Viking pump 224A-CHC1 Series Operating manual

MODEL NUMBER CHART
JACKETED O-RING SEAL BUSHING
GROOVED CASING STANDARD CASING
H224A-CHC1 H224A-CHC2
HL224A-CHC1 HL224A-CHC2
K224A-CHC1 K224A-CHC2
KK224A-CHC1 KK224A-CHC2
LQ224A-CHC1 LQ224A-CHC2
LL224A-CHC1 LL224A-CHC2
LS224A-CHC1 LS224A-CHC2
Q224A-CHC1 Q224A-CHC2
QS224A-CHC1 QS224A-CHC2
INTRODUCTION
The illustrations used in this manual are for identication
purposes only and cannot be used for ordering parts.
Obtain a parts list from a Viking Pump representative. Always
give a complete name of part, part number and material with
the model number and serial number of pump when ordering
repair parts. The unmounted pump or pump unit model
number and serial number are on the nameplate. This manual
only applies to the pump models specied in the "Model
Number Chart" on page 1. Pump specications and
recommendations are listed in AD-23, which is available at
vikingpump.com.
Viking Pump® 224A-CHC1 & 224A-CHC2 Pump Series
designed specically for handling chocolate and related
confectionary processes. Viking Chocolate Series Pumps
are suitable for low hazard foods like chocolate according to
each facility’s HACCP plan. They are not a hygienic design
according to 3A or FDA, and are not suitable for services
requiring CIP or COP.
FIGURE 1: HL FIGURE 3: LSFIGURE 2: K FIGURE 4: QS
TABLE OF CONTENTS
Model Number Chart..................................................................1
Introduction ................................................................................1
Safety Information & Instructions...............................................2
Special Information .................................................................... 3
Rotation ..................................................................................3
Circulation Lines.....................................................................3
Jacketed Ports........................................................................ 3
EC1935 Certication ..............................................................3
Maintenance...............................................................................3
Lubrication..............................................................................3
Cleaning Pump.......................................................................3
Storage ...................................................................................3
Suggested Repair Tools ......................................................... 3
Removal: O-Ring Seal Bushing.................................................5
Installation: O-Ring Seal Bushing ..............................................5
Pump Disassembly .................................................................... 6
Pump Assembly .........................................................................7
Thrust Bearing Adjustment ........................................................8
Installation: Hardened Iron Idler Bushing ..................................9
Spacer Coupling Lengths ..........................................................9
APPENDIX (Formerly TSM 000) ........................................................9
General Installation Notes..........................................................9
Foundation ............................................................................... 11
Component & Unit Lifting Features ......................................... 11
Alignment .................................................................................12
Piping .......................................................................................13
Start Up ....................................................................................14
Troubleshooting .......................................................................14
Vacuum Gauge - Suction Port .............................................14
Pressure Gauge - Discharge Port........................................15
Rapid Wear .............................................................................16
Preventative Maintenance .......................................................16
Do’s & Don’ts ...........................................................................17
Operation..............................................................................17
Maintenance.........................................................................17
Declaration of Conformity ........................................................18
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Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018
TSM 1462
Page 1 of 18
Issue A
TECHNICAL SERVICE MANUAL
INSTALLATION, OPERATION & MAINTENANCE
CHOCOLATE PUMP: CAST IRON
SERIES: 224A-CHC1, 224A-CHC2
SIZES: H, HL, K, KK, LQ, LL, LS, Q, QS

SAFETY INFORMATION & INSTRUCTIONS
IMPROPER INSTALLATION, OPERATION OR MAINTENANCE
OF PUMP MAY CAUSE SERIOUS INJURY OR DEATH AND/OR
RESULT IN DAMAGE TO PUMP AND/OR OTHER EQUIPMENT.
VIKING’S WARRANTY DOES NOT COVER FAILURE DUE TO
IMPROPER INSTALLATION, OPERATION OR MAINTENANCE.
THIS INFORMATION MUST BE FULLY READ BEFORE
BEGINNING INSTALLATION, OPERATION OR MAINTENANCE
OF PUMP AND MUST BE KEPT WITH PUMP. PUMP MUST BE
INSTALLED, OPERATED AND MAINTAINED ONLY BY SUITABLY
TRAINED AND QUALIFIED PERSONS.
THE FOLLOWING SAFETY INSTRUCTIONS MUST BE FOLLOWED AND ADHERED TO AT ALL TIMES.
⚠DANGER = FAILURE TO FOLLOW THE INDICATED
INSTRUCTION MAY RESULT IN SERIOUS INJURY
OR DEATH.
⚠
WARNING = IN ADDITION TO SERIOUS INJURY OR DEATH,
FAILURE TO FOLLOW THE INDICATED INSTRUCTION MAY
CAUSE DAMAGE TO PUMP AND/OR OTHER EQUIPMENT
⚠WARNING
INSTALL pressure gauges/sensors next to the pump suction
and discharge connections to monitor pressures.
⚠WARNING
USE extreme caution when lifting the pump. Suitable lifting
devices should be used when appropriate. Lifting eyes
installed on the pump must be used only to lift the pump, not
the pump with drive and/or base plate. If the pump is mounted
on a base plate, the base plate must be used for all lifting
purposes. If slings are used for lifting, they must be safely and
securely attached. For weight of the pump alone (which does
not include the drive and/or base plate) refer to the Viking
Pump product catalog.
⚠DANGER
DO NOT attempt to dismantle a pressure relief valve that has
not had the spring pressure relieved or is mounted on a pump
that is operating.
⚠DANGER
AVOID contact with hot areas of the pump and/or drive.
Certain operating conditions, temperature control devices
(jackets, heat-tracing, etc.), improper installation, improper
operation, and improper maintenance can all cause high
temperatures on the pump and/or drive.
⚠WARNING
THE PUMP must be provided with pressure protection. This
may be provided through a relief valve mounted directly on
the pump, an in-line pressure relief valve, a torque limiting
device, or a rupture disk. If pump rotation may be reversed
during operation, pressure protection must be provided on
both sides of pump. Relief valve adjusting screw caps must
always point towards suction side of the pump. If pump
rotation is reversed, position of the relief valve must be
changed. Pressure relief valves cannot be used to control
pump ow or regulate discharge pressure. For additional
information, refer to Appendix, General Installation Notes,
item 5 on Pressure Protection or contact your Viking Pump
representative for Engineering Service Bulletin ESB-31.
⚠WARNING
THE PUMP must be installed in a manner that allows safe
access for routine maintenance and for inspection during
operation to check for leakage and monitor pump operation.
⚠DANGER
BEFORE opening any liquid chamber (pumping chamber,
reservoir, relief valve adjusting cap tting, etc.) be sure that:
• Any pressure in the chamber has been completely vented
through the suction or discharge lines or other appropriate
openings or connections.
• The pump drive system means (motor, turbine, engine,
etc.) has been “locked out” or otherwise been made non-
operational so that it cannot be started while work is being
done on the pump.
• You know what material the pump has been handling,
have obtained a material safety data sheet (MSDS) for
the material, and understand and follow all precautions
appropriate for the safe handling of the material.
⚠DANGER
BEFORE operating the pump, be sure all drive guards are in
place.
⚠DANGER
DO NOT operate pump if the suction or discharge piping is
not connected.
⚠DANGER
DO NOT place ngers into the pumping chamber or its
connection ports or into any part of the drive train if there is
any possibility of the pump shafts being rotated.
⚠WARNING
DO NOT exceed the pumps rated pressure, speed, and
temperature, or change the system/duty parameters from
those the pump was originally supplied, without conrming its
suitability for the new service.
⚠WARNING
BEFORE operating the pump, be sure that:
• It is clean and free from debris
• All valves in the suction and discharge pipelines are fully
opened.
• All piping connected to the pump is fully supported and
correctly aligned with the pump.
• Pump rotation is correct for the desired direction of ow.
TSM 1462 |Issue A |Page 2 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

SPECIAL INFORMATION
ROTATION
Viking pumps operate equally well in a clockwise or
counter-clockwise rotation. Some constructions may require
modications, consult Viking Pump representative if unsure.
Shaft rotation determines which port is suction and which is
discharge. Suction port is where pumping elements (gear
teeth) come out of mesh.
If pump rotation is reversed during operation, pressure
protection must be provided on both sides of pump.
Relief valve adjusting screw cap must always point towards
suction side of pump. If pump rotation is reversed, remove
pressure relief valve and turn end for end.
CIRCULATION LINES
This equipment (not utilized on all pumps) must be connected
properly. Packed pumps typically have a ush line from
packing chamber to discharge port. Mechanical seal
pumps typically have a suckback line from seal chamber to
suction port. If pump rotation is reversed, be sure circulation
connections are connected to the suction or discharge port as
noted above to avoid excessive leakage or damage to pump.
If pump is handling heated product, be sure circulation line is
insulated to assure continued ow.
JACKETED PORTS
Jackets are utilized to heat (or cool) the pump and liquid in the
pump prior to startup. Not all pumps have ports for jacketing.
Jacketing port locations vary by model.
EC1935 CERTIFICATION
EC1935/2004 is a European standard covering
materials that come into contact with foods.
It requires that food contact materials may not
transfer substances to foods in quantities which represent a
health risk to people, lead to an unacceptable change in the
composition of the food, or adversely a󰀨ect the organoleptic
properties of the food. Viking 224A-CHC1 and -CHC2 pumps
comply with this standard, and the EC1935 cup and fork logo
is visible on the pump nameplate.
See back page for Declaration of Conformity.
MAINTENANCE
These pumps are designed for long, trouble-free service life
under a wide variety of application conditions with a minimum
of maintenance. The points listed below will help provide long
service life.
LUBRICATION
External lubrication must be applied slowly with a hand gun
to the bearing houseing lubrication tting every 500 hours
of operation with food grade grease, NLGI # 2. Contact your
Viking Pump representative with specic lubrication questions
or to obtain a copy of Engineering Service Bulletin ESB-515.
The O-Ring Seal Bushing used in the 224A-CHC1 &
224A-CHC2 pumps require external food grade grease
lubrication applied slowly with a grease gun every two weeks
of operation. Approximate grease capacity is 1.5 oz. on H-LS
and 3 oz. on the Q and QS.
CLEANING PUMP
Keep pump as clean as possible. This will facilitate inspection,
adjustment and repair work and help prevent overlooking a
dirt covered grease tting.
STORAGE
If pump is to be stored, or not used for six months or more,
pump must be drained and a light coat of non-detergent light
food grade oil must be applied to all internal pump parts.
Lubricate ttings and apply food grade grease to pump shaft
extension. Viking suggests rotating pump shaft by hand one
complete revolution every 30 days to circulate the oil. Tighten
all pump assembly bolts before putting pump in service after
being stored.
SUGGESTED REPAIR TOOLS
The following tools must be available to properly repair these
pumps. These tools are in addition to standard mechanics’ tools
such as open-end wrenches, pliers, screwdrivers, etc. Most of
the items can be obtained from an industrial supply house.
1. Soft Headed hammer
2. Allen wrenches (some mechanical seals and set collars)
3. O-Ring seal bushing installation sleeve
2-751-002-730 for 1.125 inch seal; H-HL pumps
2-751-003-730 for 1.4375 inch seal; K-LL pumps
2-751-005-630 for 2.4375 inch seal; Q-QS pumps
No sleeve needed for LS pumps
4. Bearing locknut spanner wrench
Source: #471 J. H. Williams & Co. or equal; H-LL pumps
Source: #472 J. H. Williams & Co. or equal; LS-QS pumps
5. Spanner wrench, adjustable pin type for use on bearing
housing
Source: #482 J. H. Williams & Co. or equal; H-QS pumps
Supplied with pump; N-RS pumps
6. Brass or hardwood bar
7. Arbor press
TSM 1462 |Issue A |Page 3 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

13468
5
5
2
716
19
18C
18A 18B 18A
17
28 12
30A
27
12B 26A
26
30A 29
30
31
51 34 52
36
37 35
40
39
43 44
1356716
18B 19
18C
248
5
11
18A
18A
17
28 27
12B 26A
26 29 36
31 35 37 38 39 40 41 42 43
30
30
12
FIGURE 5: EXPLODED VIEW (H, HL, K, KK, LQ, LL, LS SIZES)
FIGURE 6: EXPLODED VIEW (Q, QS SIZES)
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1Locknut 16 O-Ring Seal Bushing Nut 30 Pipe Plug
2Lockwasher 17 O-Ring Seal Bushing Capscrew 31 Casing
3End Cap for Bearing Housing 18A Dynamic O-Ring 35 Head Gasket
4Bearing Spacer Collar (Outer) 18B Inner Static O-Ring 36 Rotor and Shaft Assembly
5Lip Seal for Bearing Housing 18C Outer Static O-Ring 37 Idler and Bushing Assembly
6Ball Bearing 19 O-Ring Seal Bushing 38 Bushing (part of 37)
7Bearing Housing 26 Pressure Relief Fitting 39 Idler Pin (part of 40)
8Bearing Spacer Collar (Inner) 26A Reducer Bushing (Not H, HL) 40 Head and Idler Pin Assembly
11 Half Round Ring (Not H, HL) 27 Bracket 41 Jacketed Head Plate Gasket
12 Grease Fitting 28 Capscrew for Bracket 42 Jacketed Head Plate
12B Grease Fitting 29 Bracket Gasket 43 Head Capscrews
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1Locknut 18A Dynamic O-Ring 34 Pipe Flange Gasket
2Lockwasher 18B Inner Static O-Ring 35 Head Gasket
3End Cap for Bearing Housing 18C Outer Static O-Ring 36 Rotor and Shaft Assembly
4Bearing Spacer Collar (Outer) 19 O-Ring Seal Bushing 37 Idler and Bushing Assembly
5Lip Seal for Bearing Housing 26 Pressure Relief Fitting 39 Idler Pin (part of 40)
6Ball Bearing 26A Reducer Bushing 40 Head and Idler Pin Assembly
7Bearing Housing 27 Bracket 41 Jacketed Head Plate Gasket (not shown)
8Bearing Spacer Collar (Inner) 28 Capscrew for Bracket 42 Jacketed Head Plate (not shown)
12 Grease Fitting 29 Bracket Gasket 43 Head Capscrews
12B Grease Fitting 30 Pipe Plug 44 Nut for Head
16 O-Ring Seal Bushing Nut 30A Pipe Plug 51 Stud for Flanges
17 O-Ring Seal Bushing Capscrew 31 Casing 52 Nut for Flanges
Contact your Viking stocking distributor for available seal and rebuild kits
Contact your Viking stocking distributor for available seal and rebuild kits
TSM 1462 |Issue A |Page 4 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

FIGURE 7:
FIGURE 8:
NOTE: Coat rotor shaft, tapered installation
sleeve and inner diameter of O-ring seal bushing
with P-80®or equivalent before assembly.
⚠DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve adjusting cap
tting, etc.) Be sure:
1. That any pressure in the chamber has been
completely vented through the suction or discharge
lines or other appropriate openings or connections.
2. That the driving means (motor, turbine, engine, etc.)
has been “locked out” or made non-operational so that
it cannot be started while work is being done on pump.
3. That you know what liquid the pump has been handling
and the precautions necessary to safely handle the
liquid. Obtain a material safety data sheet (MSDS) for
the liquid to be sure these precautions are understood.
Failure to follow above listed precautionary measures
may result in serious injury or death.
Tapered Installation Sleeve
Shaft
REMOVAL: O-RING SEAL
BUSHING
The O-Ring Seal Bushing (OSB) was specially designed to
that it could be removed and the food grade O-Rings replaced
with minimal pump disassembly.
1. Insert length of hardwood or brass through port opening
between rotor teeth to keep shaft from turning. Bend up
tang of lockwasher and with a spanner wrench, remove
locknut and lockwasher from shaft.
2. Loosen two set screws in the face of the bearing housing
and remove the bearing housing assembly from the
bracket. In order to remove the bearing housing and
O-Ring Seal Bushing with the pump in place, Viking
recommends using Spacer Couplings with at least a 4.75”
gap for the H/HL size pumps, 6.25” gap for the K-LL size
pumps, and a 7.75” gap for the Q/QS size pumps.
INSTALLATION: O-RING SEAL
BUSHING
1. Lubricate the O-Rings and OSB thoroughly with food
grade O-Ring lubricant or grease.
2. Install the inner dynamic O-Rings and the outer static
O-Rings in the O-Ring grooves in the OSB.
3. Leaving the Rotor Shaft out of the pump, install the O-Ring
Seal Bushing into the bracket. Make sure the gland dimple
is downward. This positions the lubrication groove at the
opposite end in the 6 o’clock position.
4. You will encounter resistance as the first outer static
O-Ring enters the bushing bore area in the bracket. Rotate
the OSB as needed, but do not hammer it or damage to
the O-Rings may occur.
5. Once the OSB is far enough into the bracket bore, you can
use the gland bolts to gently pull the OSB the rest of the
way into the bracket bore.
6. Tighten both nuts on the gland bolts completely.
7. NOTE: Burrs left on the shaft can damage the inner
dynamic O-Rings in the O-Ring Seal Bushing during
installation. Inspect the shaft for burrs and remove any
found with a fine grade of emery cloth.
8. Place tapered seal installation sleeve on shaft (H, HL, K,
KK, LQ, LL, Q, and QS, no sleeve required for LS size).
Coat the rotor shaft & installation sleeve with a generous
amount of food grade grease.
9. Carefully insert the rotor shaft into the pump casing.
Prevent the shaft keyway or threads from contacting the
inner dynamic O-Rings. The shaft threads and keyway
may be taped to ensure the O-Rings aren’t nicked by the
shaft edges.
10.Remove the seal installation sleeve.
11. Reinstall the head with idler gear, using a new head
gasket. Ensure that the crescent is opposite the sealing
area between the ports.
12.Place pair of half round rings in groove on shaft (K, KK,
LQ, LL, and LS sizes only) and turn bearing housing
assembly into bracket.
13.Put lockwasher and locknut on shaft. Tighten locknut and
bend one tang of lockwasher into slot of locknut.
14.Adjust pump end clearance, refer to "Thrust Bearing
Adjustment" on page 8.
3. Remove the pair of half round rings (K, KK, L, LQ, LL, and
LS sizes only) under the inner spacer collar from the shaft.
4. Loosen the gland nuts securing the O-Ring Seal Bushing
into the bracket and remove the T-bolts.
5. Thread the jack bolts into the tapped holes at the 6 and 12
o’clock position on the face of the O-Ring Seal Bushing.
Remove the OSB through the bearing housing opening.
6. Clean as much old grease and product out of the area
between the pump bracket bore and shaft as possible,
taking care not to nick the finished surfaces.
If the pump is to be disassembled further, refer to "Pump
Disassembly" on page 6.
TSM 1462 |Issue A |Page 5 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

PUMP DISASSEMBLY
1. Mark head and casing before disassembly to insure proper
reassembly. The idler pin, which is offset in pump head,
must be positioned toward and equal distance between
port connections to allow for proper flow of liquid through
the pump.
Remove nuts and capscrews from head. The use of a
hoist to support head will facilitate its removal
Avoid damaging head gasket. Back head slightly away
from casing. Do not allow idler to fall from idler pin. To
prevent this, tilt top of head back when removing. Remove
head from pump. If a hoist is not available, cribbing or
blocking can be used to support head. This will eliminate
having to lift head into position when reassembling pump.
The pump has jacketed head plate; it will separate from
head when it is removed. The gasket between head and
jacket head plate must be totally removed. Use new
gasket when assembling pump.
2. Remove head gasket, idler and bushing assembly.
3. Insert a length of hardwood or brass through port opening
between rotor teeth or lock coupling end of shaft to keep
shaft from turning. Bend up tang of lockwasher and with
a spanner wrench; remove locknut and lockwasher from
shaft. Remove length of hardwood or brass from port
opening.
4. Loosen the two setscrews in the face of the bearing
housing and remove the bearing housing assembly from
the bracket. See "Figure 9" on page 6.
5. Remove pair of half round rings under the inner spacer
collar from the shaft for K, KK, LQ, LL, LS sizes only.
6. Remove pipe plug from drain hole in casing or bracket,
breaking vacuum behind rotor.
NOTE: Refer to "Removal: O-Ring Seal Bushing" on page
5.
7. Carefully remove rotor and shaft and examine for shaft
and rotor wear. Excessive wear at the O-Ring locations
may require replacement of the rotor shaft to ensure a
good seal.
8. Loosen two radial setscrews in flange of bearing housing
and with a spanner wrench remove the outer end cap with
lipseal and outer bearing spacer collar.
9. Remove the double row ball bearing, (2 tapered roller
bearings on Q, QS, N, R, RS sizes), lipseal and inner
bearing spacer collar from the bearing housing.
10.Clean all parts thoroughly and examine for wear and
damage. Check lipseals, bearings, bushings, and idler
pin and replace if necessary. Check all other parts for
nicks, burrs, excessive wear and replace if necessary.
Consult applicable Inspection Reports, available from
your distributor. Wash bearings in clean solvent. Blow out
bearings with compressed air. Do not allow bearings to spin;
turn them slowly by hand. Spinning bearings will damage
bearing components. Make sure bearings are clean, then
lubricate with light oil and check for roughness. Roughness
can be determined by turning outer race by hand.
FIGURE 10: BEARING HOUSING ASSEMBLY
(K, KK, LQ, LL, LS)
LIP SEALS
LIP SEALS
END CAP
SPACER COLLAR
SPACER COLLAR
SETSCREWS
SHAFT
SHAFT
BEARING HOUSING
LOCKNUT & LOCKWASHER
LOCKNUT & LOCKWASHER
BALL BEARING
⚠CAUTION !
Do not intermix inner and outer races of tapered roller
bearing (Q, QS, N, R, RS sizes)
11. Casing can be checked for wear or damage while
mounted on bracket.
12.Inspect bracket bushing for wear and remove if damaged
or worn.
FIGURE 9: BEARING HOUSING ASSEMBLY (H, HL)
END CAP
HALF ROUND RINGS
SETSCREW
BEARING HOUSING
BALL BEARING
TSM 1462 |Issue A |Page 6 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

FIGURE 11: BEARING HOUSING ASSEMBLY
(Q, QS)
END CAP
LIP SEALS
SPACER COLLAR
SETSCREW
SHAFT
SETSCREW
BEARING HOUSING
LOCKNUT & LOCKWASHER
ROLLER BEARINGS
PUMP ASSEMBLY
1. Install bracket on the casing if separated during assembly.
Be sure gasket is placed between bracket and casing.
2. Coat shaft of rotor / shaft assembly with light oil. Start end
of shaft in bracket bushing turning from right to left, slowly
pushing rotor in casing.
3. Coat idler pin with light oil and place idler and bushing on
idler pin in head. If replacing with drilled hardened iron
idler bushing, Refer to "Installation: Hardened Iron Idler
Bushing" on page 9.
4. Using a .010 to .015 inch thick head gasket, install head
and idler assembly on pump. Pump head and casing should
have been marked before disassembly to ensure proper
reassembly. If not, be sure idler pin, which is offset in pump
head, is positioned toward the equal distance between port
connections to allow for proper flow of liquid through pump.
Refer to "Figure 5" on page 4 or "Figure 6" on page
4for bearing housing assembly.
5. Install the lipseal in the bearing housing (See "Figure 8"
on page 5, "Figure 9" on page 6 or "Figure 10"
on page 6 for lip orientation).
6. H, HL Sizes: Pack the ball bearing with grease and push
or press the bearing into the bearing housing. See "Figure
8" on page 5.
Q, QS Sizes: Pack tapered roller bearings with grease
and press or push bearings into housing with large end
of inner races together. It is possible to install bearings
incorrectly. For proper assembly see "Figure 10" on page
6.
7. Install the lipseal in the end cap (see appropriate figure
for lip orientation). Thread the end cap into the bearing
housing along with outer bearing spacer collar and tighten
against the bearing.
Q, QS Sizes ONLY: Tapered roller bearings require
preload to operate properly. To set preload tighten end
cap so that inner races of bearings cannot be rotated by
hand. Make a mark on the outside diameter of the bearing
housing and a corresponding mark on the bearing housing
end cap. Rotate the bearing housing end cap in a counter
clockwise direction until the mark on the outside diameter
of the bearing housing is past the mark on the bearing
housing end cap by 0.375 in. (9.52mm) for the N bearing
housing or 0.422 in. (10.72mm) for the R & RS bearing
housings. This will provide the correct end play for the
bearings.
Lock end cap in place with two setscrews in the ange of
the bearing housing.
NOTE: Refer to "Installation: O-Ring Seal Bushing" on
page 5.
8. Slide inner spacer collar over shaft with recessed end facing
rotor. H, HL, Q, QS bearing spacer collars are not recessed.
K, KK, LQ, LL, LS Sizes ONLY: Place pair of half round
rings on shaft and slide inner bearing spacer collar over
half round rings to lock them in place.
9. Thread the bearing housing with lipseals; end cap, outer
bearing spacer collar and bearings installed into bracket.
TSM 1462 |Issue A |Page 7 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

THRUST BEARING ADJUSTMENT
1. Loosen the two set screws in the outer face of the bearing
housing and rotate the bearing housing in a clockwise
direction until it cannot be turned any more. This ensures
the rotor is all the way forward and is touching the head. It
will not be possible to turn the rotor by hand in this location.
2. Make a mark on the outside diameter of the bearing
housing and a corresponding mark on the bearing bracket.
3. Rotate the bearing housing in a counter clockwise
direction until the mark on the outside diameter of the
bearing housing is past the mark on the bearing bracket
per "Table 2" on page 9. This will provide the
standard end clearance for the pump. If possible, check
end clearance with feeler gauge between idler and rotor
faces. Operating the pump at higher temperatures or
viscosities may require additional end clearance. Contact
your local Viking representative for those clearances.
"Table 2" on page 9 shows the additional bearing
housing adjustment required for .001” increase in end
clearance.
4. Tighten setscrews in the outer face of the bearing housing.
5. Rotate the rotor shaft by hand to make sure it turns freely.
TABLE 2: END CLEARANCE CHART
Size Series
Standard
End
Clearance
(Inches)
Turn Bearing
Housing CCW
Length on OD
(Inches)
Additional Length
on OD bearing
House for .001"
End Clearance
(Inches)
H, HL CHC1 0.011" 2.50" 0.22"
CHC2 0.011" 2.50" 0.22"
K, KK CHC1 0.020" 5.00" 0.25"
CHC2 0.015" 3.75" 0.25"
LQ, LL,
LS
CHC1 0.020" 5.00" 0.25"
CHC2 0.013" 3.25" 0.25"
Q, QS CHC1 0.025" 7.75" 0.31"
CHC2 0.015" 4.65" 0.31"
⚠DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve adjusting cap
tting, etc.) Be sure:
1. That any pressure in the chamber has been
completely vented through the suction or discharge
lines or other appropriate openings or connections.
2. That the driving means (motor, turbine, engine, etc.)
has been “locked out” or made non-operational so that
it cannot be started while work is being done on pump.
3. That you know what liquid the pump has been handling
and the precautions necessary to safely handle the
liquid. Obtain a material safety data sheet (MSDS) for
the liquid to be sure these precautions are understood.
Failure to follow above listed precautionary measures
may result in serious injury or death.
10.Put lockwasher and locknut on shaft. Insert length of
hardwood or brass through port opening between rotor
teeth to keep shaft from turning. Tighten locknut as per
"Table 1" on page 8. If tang does not line up with
slot, tighten locknut until it does. Failure to tighten locknut
or engage lockwasher tang could result in early bearing
failure and cause damage to rest of pump. Remove length
of hardwood or brass from port opening.
TABLE 1: LOCKNUT TORQUE
Pump Size Torque (Ft.-Lbs.)
H, HL 50-70
K, KK, LQ, LL 100-130
LS 120-150
Q, QS 170-190
11. Adjust pump end clearance, see "Thrust Bearing
Adjustment" on page 8.
12.Reinstall drain plug in casing / bracket.
13.Lubricate all grease fittings with multi-purpose grease,
NLGI #2. The factory uses polyurea type grease.
Thoroughly clean out grease of using another grease
chemistry.
⚠DANGER !
Before starting pump, be sure all drive equipment guards
are in place.
Failure to properly mount guards may result in serious
injury or death.
TSM 1462 |Issue A |Page 8 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

INSTALLATION: HARDENED IRON
IDLER BUSHING
The 224A-CHC1 and 224A-CHC2 Pumps come with cross-
drilled idler and idler bushing assemblies. Viking recommends
buying replacement idler & bushing assemblies, which are
part of the Viking Rebuild Kits - see "Table 3" on page 9.
However, if the bushing is just being replaced and the existing
idler gear re-used, the steps listed below will need to be
followed.
1. Lubricate bushing outer diameter and/or idler gear bore
with food grade grease.
2. A press must be used for installation
3. Be certain bushing is started straight.
4. Press in bushing, do not stop pressing operation until
bushing is in proper position.
5. The new hardened iron bushing will need to be drilled
using the existing guide holes in the drilled idler gear.
Using carbide bit, slowly drill through holes into the
bushing. Use light pressure when breaking through the
bushing ID.
6. Remove any burrs with a fine grade of emery cloth.
TABLE 3:
CHC CHOCOLATE PUMP O-RING & REBUILD KITS
Pump Size O-Ring Kit Rebuild Kit
H224A CHC1 & CHC2 3-464-ORG-877-H1 3-464-REBUILD-K467
HL224A CHC1 & CHC2 3-464-ORG-877-H1 3-464-REBUILD-K468
K224A CHC1 & CHC2 3-464-ORG-877-K1 3-464-REBUILD-K469
KK224A CHC1 & CHC2 3-464-ORG-877-K1 3-464-REBUILD-K470
LQ224A CHC1 & CHC2 3-464-ORG-877-L2 3-464-REBUILD-K471
LL224A CHC1 & CHC2 3-464-ORG-877-L2 3-464-REBUILD-K472
LS224A CHC1 & CHC2 3-464-ORG-877-L1 3-464-REBUILD-K473
Q224A CHC1 & CHC2 3-464-ORG-877-Q1 3-464-REBUILD-K474
QS224A CHC1 & CHC2 3-464-ORG-877-Q1 3-464-REBUILD-K475
SPACER COUPLING LENGTHS
The O-Ring Seal Bushing (OSB) was specially designed to
that it could be removed and the food grade O-Rings replaced
with minimal pump disassembly. In order to remove the
bearing housing and O-Ring Seal Bushing with ease, Viking
recommends using the following Spacer Coupling gaps:
TABLE 4: SPACER COUPLING LENGTHS
Pump Size Gap (Inches)
H, HL 4.75"
K, KK, LQ, LL, LS 6.25"
Q, QS 7.75"
APPENDIX (FORMERLY TSM 000)
NOTE: This Appendix section is for reference only. Not
all pump construction features apply to pumps within this
Technical Service Manual.
GENERAL INSTALLATION NOTES
Before installation is started, a few items of a general nature
should be considered.
1. Location - always locate the pump as close as possible
to the supply of liquid to be pumped. Locate it below
the liquid supply if at all practical. Viking pumps are self
priming but the better the suction conditions the better the
performance.
2. Accessibility - the pump should be located where it is
accessible for inspection, maintenance, and repair. For
large pumps, allow room to remove the rotor and shaft
without removing the pump from the base.
3. Port Arrangement - since the pumps have different port
arrangements depending on the model, port location
should be checked before starting the installation. The
ports may be upright, opposite or at right angles to each
other, see Figure A1. The right angle ports are normally
right-hand, see Figure A2; some models are available
with left-hand arrangements; still other models are
available with the right angle ports located in any one of
eight positions including right-hand and left-hand.
4. Suction/Discharge - shaft rotation will determine which
port is suction and which is discharge. A look at Figure
A3 will show how rotation determines which port is which;
as the pumping elements (gears) come out of mesh,
point “A” on Figure A3, liquid is drawn into the suction
port; as the gears come into mesh, point “B”, the liquid
is forced out the discharge port. Reversing the rotation
reverses the flow through the pump. When determining
shaft rotation, always look from the shaft end of the pump.
Unless otherwise specified, rotation is assumed to be
clockwise (CW), which makes the suction port on the right
side of the pump. The idler pin, which is offset in the pump
head, should be properly positioned toward and an equal
distance between the port connections.
Left-Hand
Pump
Right-Hand
Pump
FIGURE A1
FIGURE A2
TSM 1462 |Issue A |Page 9 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

⚠CAUTION !
Internal type relief valves mounted on Viking pumps
should always have the cap or bonnet pointed toward
the suction side of the pump. Return-to-tank type relief
valves should always be mounted on the discharge side
of the pump. If pump rotation is reversed, change the
relief valve. Turn the internal type end for end; move the
return-to-tank type to the other port. If on a particular
installation rotation is reversed, e.g., using one pump
to ll a tank and then by use of a reversing switch or
other means of changing the rotation to permit the same
pump to circulate the liquid through a heater or to load
out, then pressure protection must be provided on both
sides of the pump for both rotations. This may be a
combination of relief valves, torque limiting devices or
rupture disks.
⚠CAUTION !
Pumps or systems without relief valves should have
some form of pressure protection, e.g. torque limiting
devices or rupture disks.
5. Pressure Protection - Viking pumps are positive
displacement. This means that when the pump is rotated,
liquid will be delivered to the discharge side of the pump.
If there is no place for this liquid to go - discharge line is
blocked or closed - pressure can build up until the motor
stalls, the drive equipment fails, a pump part breaks or
ruptures, or the piping bursts. Because of this, some
form of pressure protection must be used with a positive
displacement pump. This may be a relief valve mounted
directly on the pump, an inline relief valve, a torque limiting
device or a rupture disk.
The pressure relief valve mounted on most Viking pumps
and most in-line valves are of the spring loaded poppet
design. See Figure A4. The spring (a) holds poppet
(b) against the seat in the valve body (c) with a given
force determined by the spring size and by how tightly
it is compressed by the adjusting screw (d). The pump
discharge pressure pushes against the underside of the
poppet at point (e). When the force exerted by the liquid
under the poppet exceeds that exerted by the spring, the
poppet lifts and liquid starts to ow through the valve.
FIGURE A4:
CUTAWAY OF VIKING INTERNAL
PRESSURE RELIEF VALVE
Cap
Spring (a)
Valve Body (c)
Poppet (b)
Liquid OutletLiquid Inlet
Point (e)
Adjusting Screw (d)
(Should Always
Point Toward
Suction Port)
FIGURE A5-A:
INTERNAL PRESSURE RELIEF VALVE
FIGURE A5-B:
RETURN-TO-TANK PRESSURE RELIEF VALVE
FIGURE A3:
Discharge
Suction
Pump Head
Discharge
Suction
Pump Head
Valve Always Mounts
on Discharge Side of
Pump
Relief Valve Adjusting Screw
Cap (Should Always Point
Toward Suction Port)
Discharge
Idler Pin
Suction
AB
TSM 1462 |Issue A |Page 10 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

FIGURE A6:
EXAMPLE OF PROPER LIFTING METHOD
NOTE: Units should be lifted by the base lifting features using
two or more lifting slings.
FIGURE A7:
EXAMPLES OF PROPER LIFTING METHOD
NOTE: Use two or more lifting slings around the pump and
the motor when the base does not have lifting features. Make
sure the slings are secure and the load is balanced before
attempting to lift.
FIGURE A8:
EXAMPLE OF IMPROPER LIFTING METHOD
NOTE: NEVER lift the unit with slings unsecured under the
base. The slings can slide, allowing the unit to tip and/or fall.
Improper lifts can result in personal injury and/or damage to
the unit.
As the discharge pressure builds up, more and more of the
liquid ows through until a pressure is reached at which all
of the liquid being pumped is going through the valve. This
pressure is the relief valve setting.
Viking pumps can be furnished with either an internal
pressure relief valve - one which directs the ow from the
valve back to the suction side of the pump - or a return-
to-tank valve - which directs the ow through piping back
to the supply tank. See Figure A5-A and Figure A5-B.
An inline relief valve mounted in the discharge piping also
directs the ow back to the supply tank. This type of valve
should be mounted close to the pump so that the pressure
drop through the piping between the pump and the valve
is at a minimum. Be sure there are no shuto󰀨 valves
between the pump and relief valve. Piping from a return-
to-tank or an in-line valve to the supply tank should also
be as short and as large as possible.
NOTE: On some models, the relief valve is mounted on
the pump casing instead of the pump head.
The spring loaded poppet-type valve is strictly a di󰀨erential
valve, sensing only those pressures on each side of the
poppet. It should not be used as a pressure or ow control
device. It is intended strictly as a relief valve.
The pressure at which either the return-to-tank or internal
relief valve bypasses can be changed by turning the
adjusting screw. Do not back the adjusting screw all the
way out. Stop when spring tension is o󰀨 the screw (the
screw starts to turn easily). For details on maintenance of
the relief valve, see Technical Service Manual covering
your model series.
6. Motor - follow local electrical codes when hooking up
motors.
FOUNDATION
Every pump should have a solid foundation. It may be any
structure su󰀩ciently strong to hold the pump rigid and to
absorb any strain or shock that may be encountered.
A certied print of the pumping unit should be used in
preparing the foundation. If a separate foundation is provided,
make it at least four inches wider and longer than the base of
the unit.
When the unit is placed on the foundation, it should be leveled
and checked for position against the piping layout and then
fastened down.
COMPONENT & UNIT LIFTING
FEATURES
Removable lifting features, such as threaded eye bolts
and hoist rings, installed in components (pumps, reducers,
motors, etc.) and baseplates will be left on the components.
These features are used to safely lift and move the individual
components. Following are general guidelines for lifting Viking
Pump units.
TSM 1462 |Issue A |Page 11 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

ALIGNMENT
CHECK ALIGNMENT AFTER MOUNTING
For detailed coupling alignment procedures see coupling
manufacturers’ recommendations.
The pump, drive, and motor were properly aligned at the
time they were assembled. During shipping and mounting
the alignment is often disturbed. BE SURE TO RECHECK
ALIGNMENT AFTER THE PUMP UNIT IS INSTALLED!
1. Check pump ports to be sure they are square and in the
proper position; shim or move the pump as required. Do
not force piping to line up with the ports.
2. If the pump is driven by a flexible coupling(s) either direct
connected to the motor or through a reducer, remove any
coupling guards or covers and check alignment of the
coupling halves. As a minimum, a straightedge (a piece
of key stock works nicely) across the coupling must rest
evenly on both rims at the top, bottom, and sides. See
Figure A10-A.
3. If the pump is driven by V-belts, check the alignment by
using a long straightedge or tightly drawn string across the
face of the sheaves. See Figure A10-B.
4. Make a final check on alignment after piping is hooked up.
Refer to item 13 in Piping section.
Figure A11 and Figure A12 show typical units - direct
drive and gear reducer drive.
5. For high temperature applications (those above 300°F)
allow the pump to reach operating temperature, then
recheck alignment.
FIGURE A9
EXAMPLE OF IMPROPER LIFTING METHOD
NOTE: NEVER lift the unit with slings connected to the
component lifting features. The lifting features are designed
for the individual component and are not rated to lift the entire
unit. Improper lifts can result in personal injury and/or damage
to the unit.
FIGURE A10-B
Driver
Sheave Driven
Sheave String
or
Straightedge
ABCD
When sheaves are properly aligned,
all points A, B, C, D will touch string or straightedge.
FIGURE A10-A
Check width between these surfaces with inside calipers to
be certain the faces are equal distance apart and parallel.
Use a straightedge. These
surfaces must be parallel.
FIGURE A11: DIRECT DRIVE
FIGURE A12: REDUCER DRIVE
TSM 1462 |Issue A |Page 12 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

PIPING
The cause of many pumping problems can be traced to
suction piping. It should always be as large and short as
practical. For help in selecting the proper size piping, both
suction and discharge, refer to Viking General Catalog
Section 510.
Before starting the layout and installation of your piping
system, consider the following points:
1. Never use piping smaller than the pump port connections.
2. Be sure the inside of the pipe is clean before hooking it up.
3. FOOT VALVE - When pumping a light liquid with a suction
lift, a foot valve at the end of the suction piping or a check
valve in the first horizontal run will hold the liquid in the
line and make it easier for the pump to prime. Be sure the
foot or check valve is big enough so that it doesn’t cause
excessive line loss.
4. When approaching an obstacle in the suction or discharge
line, go around the obstacle instead of over it. Going over
it creates an air pocket. See Figure A13.
5. Where practical, slope the piping so no air or liquid
pockets will be formed. Air pockets in the suction line
make it hard for the pump to prime.
6. For a suction line with a long horizontal run, keep the
horizontal portion below the liquid level if possible. This
keeps the pipe full so the pump does not have to remove
so much air when starting; this is most helpful when there
is no foot valve. See Figure A14.
7. When piping a hot or cold system (liquid being handled is at
a temperature different from the air surrounding the pump),
be sure allowance is made for expansion and contraction of
the piping. Loops, expansion joints, or unsecured (this does
not mean unsupported) runs should be used so the pump
casing is not distorted or put into a bind.
8. STRAINER - It is always good practice to consider a
strainer on the suction side of a positive displacement
pump. The strainer will keep foreign objects from going
into the pump; without a strainer some would go through;
others would cause a jammed pump, a broken part, or
a torn up drive. The strainer basket mesh or perforation
size should be big enough so that it does not cause
excessive pressure drop, but it should be fine enough to
protect the pump. When in doubt as to the proper size,
check with the manufacturer, giving pipe size, flow rate,
and viscosity involved. Provision should be made for
cleaning the strainer. If the pump operates continuously, a
bypass should be built around the strainer or two strainers
should be put in parallel with proper valving so they can
be isolated for cleaning. Use of a strainer is particularly
important at start up to help clean the system of weld
beads, pipe scale, and other foreign objects. For additional
information, refer to TSM 640.
9. If the pump is not equipped with a relief valve,
consideration should be given to mounting one in the
discharge line. Refer to discussion on pressure protection
in item 5 in General Comments section.
10.The pump should not be used to support the piping.
The weight of the piping should be carried by hangers,
supports, stands, etc.
11. When fastening the piping to the pump it should not be
necessary to impose any strain on the pump casing.
“Springing” or “drawing” the piping up to the pump will
cause distortion, possible misalignment, and probable
rapid wear of the pump. Do not use the pump to correct
errors in piping layout or assembly.
12.All joints of the piping system should be tight; pipe sealer
will help assure leak-free threaded joints. Leaks in the
suction line permitting air to be drawn in may cause a
noisy pump or a reduction in capacity.
13.ALIGNMENT - Check the alignment of the drive after the
piping is hooked up. As a final check on pump alignment,
remove the head of the pump and with a feeler gauge
determine if there is clearance all the way around between
the rotor and casing. Because of manufacturing tolerances,
bushing clearances, etc., the rotor may not be centered
in the casing, but it should not drag; dragging would
indicate unit misalignment or casing distortion from piping
strain. Making this check is most desirable on installations
involving Q, M and N size general purpose pumps.
14.The auxiliary piping hooked to jackets, glands, etc. for
heating, cooling, quenching, or for other purposes should
receive the same attention as the piping handling the
pumped liquid.
15.Provide a pressure relief device in any part of a pump and
piping system that can be valved off and, thus, completely
isolated. This is particularly important:
a. When handling a cold liquid such as refrigeration
ammonia that can warm up to ambient temperatures
when the pump is shut off or
b. When handling a liquid such as asphalt or molasses
that has to be heated before it can be pumped.
The rise in temperature causes the liquid to expand; if
there is no provision for pressure relief in the closed o󰀨
section, there is a chance that the pump or piping will
rupture.
FIGURE A13
Go around the
obstruction on
the horizontal
Obstruction
DO THIS NOT THIS
Obstruction
FIGURE A14
Keep Long Horizontal
Line Below Liquid Level
DO THIS
NOT THIS
TSM 1462 |Issue A |Page 13 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

If the pump still does not deliver ow, the cause may be one
or more of the following:
1. Suction line air leaks; vacuum gauge reading should help
determine if this is the problem.
2. End of suction pipe not submerged deep enough in liquid.
3. Suction lift is too great or the suction piping is too small.
4. Liquid is vaporizing in the suction line before it gets to the
pump.
If after consideration of these points it still does not pump,
suggest you review again all points given under START UP;
read through Troubleshooting in this manual and try again. If it
still does not pump, contact your Viking representative.
TROUBLESHOOTING
A Viking pump that is properly installed and maintained will
give long and satisfactory performance.
NOTE: Before making any pump adjustment or opening the
pump liquid chamber in any manner, make sure that:
1. any pressure in the pumping chamber has been vented
through the suction or discharge lines or other openings
provided for this purpose,
2. the driver has been “locked out” so that it cannot
inadvertently be started while work is being done on the
pump and
3. the pump has been allowed to cool down to the point
where there is no chance of anyone being burned.
If trouble does develop, one of the rst steps toward nding
the di󰀩culty is to install a vacuum gauge in the suction port
and a pressure gauge in the discharge port. Readings on
these gauges often will give a clue as to where to start looking
for the trouble.
VACUUM GAUGE - SUCTION PORT
1. High reading would indicate -
a. Suction line blocked - foot valve stuck, gate valve
closed, strainer plugged.
b. Liquid too viscous to flow through the piping.
c. Lift too high.
d. Line too small.
2. Low reading would indicate -
a. Air leak in suction line.
b. End of pipe not in liquid.
c. Pump is worn.
d. Pump is dry - should be primed.
3. Fluttering, jumping, or erratic reading -
a. Liquid vaporizing.
b. Liquid coming to pump in slugs, possibly an air leak,
insufficient liquid above the end of the suction pipe.
c. Vibrating from cavitation, misalignment, or damage
parts.
START UP
Before pushing the “start” button, check the following:
1. Are there vacuum and pressure gauges on or near the
pump? These gauges are the quickest and most accurate
way of nding out what is happening in the pump.
2. Check alignment - See suggestions in the Alignment
section of this manual.
3. Check piping to be sure there is no strain on the pump
casing.
4. Rotate the pump shaft by hand to be sure it turns freely.
MAKE SURE THE PUMP DRIVER IS LOCKED OUT OR
CANNOT BE ENERGIZED BEFORE DOING THIS.
5. Jog motor to be sure it is turning in the right direction;
refer to discussion on pump rotation in item 4 in General
Comments section.
6. Check any relief valves to be sure they are installed
correctly. Refer to discussion on relief valves in General
Comments section.
7. Check suction piping to be sure:
a. it is all connected and tight
b. valves are open, and
c. end of pipe is below liquid level
8. Check discharge piping to be sure (a) it is connected and
tight, (b) valves are open, and (c) there is a place for the
liquid to go.
9. Lubricate any grease fitting on the pump using a #2 NLGI
polyurea grease. Check any gear reducer, motor, coupling,
etc. for instructions and lubricate as recommended.
Contact your Viking Pump representative for Engineering
Service Bulletin ESB-515.
10.For packed pumps, loosen packing gland nuts so gland
can be moved slightly by hand. Adjust gland to reduce
leakage only after pump has run long enough to reach
constant temperature. Packing should weep a little to keep
it cool and lubricated.
11. Do not use the Viking pump to flush, pressure test or
prove the system with water. Either remove the pump or
run piping around it while flushing or testing. Pumping
water, dirty or otherwise, can do more damage in a few
minutes than months of normal service.
12.Check to be sure all guards are in place.
13.Check the pump to be sure it is heated to operating
temperature (if jacketed or heat traced).
14.Now you are ready to push the “start” button - gently.
If the pump begins to deliver liquid within 60 seconds, you’re
in business. If it does not, push the “stop” button. Do not run
the pump longer than one minute without liquid in it; you may
damage it. Review the steps just outlined, consider what the
suction and discharge gauges indicate, see Troubleshooting
section; if everything appears to be in order, put some liquid in
the pump, a lubricating liquid is best. This will help it prime.
Push the “start” button again. If nothing is owing within two
minutes, stop the pump. The pump is not a compressor; it will
not build up much air pressure; it may be necessary to vent
the discharge line until liquid begins to ow.
TSM 1462 |Issue A |Page 14 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

PRESSURE GAUGE - DISCHARGE PORT
1. High reading would indicate -
a. High viscosity and small and/or long discharge line.
b. Gate valve partially closed.
c. Filter plugged.
d. Vertical head did not consider a high specific gravity
liquid.
e. Line partially plugged from build up on inside of pipe.
f. Liquid in pipe not up to temperature.
g. Liquid in pipe has undergone a chemical reaction and
has solidified.
h. Relief valve set too high.
2. Low reading would indicate -
a. Relief valve set too low.
b. Relief valve poppet not seating properly.
c. Bypass around the pump partially open.
d. Too much extra clearance.
e. Pump worn.
3. Fluttering, jumping, or erratic reading -
a. Cavitation.
b. Liquid coming to pump in slugs.
c. Air leak in suction line.
d. Vibrating from misalignment or mechanical problems.
Some of the following may also help pinpoint the
problem:
A. Pump does not pump.
1. Lost its prime - air leak, low level in tank, foot valve
stuck.
2. Suction lift too high.
3. Rotating in wrong direction.
4. Motor does not come up to speed.
5. Suction and discharge valves not open.
6. Strainer clogged.
7. Bypass valve open, relief valve set too low, relief valve
poppet stuck open.
8. Pump worn out.
9. Any changes in the liquid system or operation that
would help explain the trouble, e.g. new source of
supply, added more lines, inexperienced operators, etc.
10.Too much end clearance.
11. Head position incorrect. See Figure A3.
B. Pump starts, then loses its prime.
1. Supply tank empty.
2. Liquid vaporizing in the suction line.
3. Air leaks or air pockets in the suction line; leaking air
through packing or mechanical seal.
4. Worn out.
C. Pump is noisy.
1. Pump is being starved (heavy liquid cannot get to
pump fast enough). Increase suction pipe size or
reduce length.
2. Pump is cavitating (liquid vaporizing in the suction
line). Increase suction pipe size or reduce length; if
pump is above the liquid, raise the liquid level closer to
the pump; if the liquid is above the pump, increase the
head of liquid.
3. Check alignment.
4. May have a bent shaft or rotor tooth. Straighten or
replace.
5. Relief valve chatter; increase pressure setting.
6. May have to anchor base or piping to eliminate or
reduce vibration.
7. May be a foreign object trying to get into the pump
through the suction port.
D. Pump not up to capacity.
1. Starving or cavitating - increase suction pipe size or
reduce length.
2. Strainer partially clogged.
3. Air leak in suction piping or along pump shaft.
4. Running too slowly; is motor the correct speed and is it
wired up correctly.
5. Bypass line around pump partially open.
6. Relief valve set too low or stuck open.
7. Pump worn out.
8. Too much end clearance.
9. Head position incorrect. See Figure A3.
E. Pump takes too much power.
1. Running too fast - Is correct motor speed, reducer
ratio, sheave size, etc. being used?
2. Is liquid more viscous than unit sized to handle; heat
the liquid, increase the pipe size, slow the pump down,
or get a bigger motor.
3. Discharge pressure higher than calculated, check with
pressure gauge. Increase size or reduce length of pipe,
reduce speed (capacity), or get bigger motor.
4. Packing gland drawn down too tight.
5. Pump misaligned.
6. Extra clearance on pumping elements may not be
sufficient for operating conditions. Check parts for
evidence of drag or contact in pump and increase
clearance where necessary.
F. Rapid Wear.
On most applications the pump will operate for many
months or years before it gradually loses its ability to
deliver capacity or pressure. Examination of such a pump
would show a smooth wear pattern on all parts. Rapid
wear, occurring in a few minutes, hours or days, shows
up as heavy grooving, galling, twisting, breaking or similar
severe signs of trouble. See Rapid Wear Table.
TSM 1462 |Issue A |Page 15 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

PREVENTATIVE MAINTENANCE
Performing a few preventative maintenance procedures will
extend the life of your pump and reduce the overall cost of
ownership.
A. Lubrication - Grease all grease ttings after every 2000
hours of operation. If service is severe, grease more often.
Do it gently with a hand gun until the grease exiting the lip
seal or relief plug is similar in consistency and color to the
new grease.
Use a NLGI #2 polyurea grease for normal applications.
For hot or cold applications, use appropriate grease.
B. Packing Adjustment - Occasional packing adjustment
may be required to keep leakage to a slight weep; if
impossible to reduce leakage by gentle tightening, replace
packing or use di󰀨erent type. Refer to Technical Service
Manual on particular model series for details on repacking.
C. End Clearance Adjustment - After long service, the
running clearance between the end of the rotor teeth and
the head may have increased through wear to the point
where the pump is losing capacity or pressure. Resetting
end clearance will normally improve pump performance.
Refer to TSM on particular model series for procedure on
adjusting end clearance for pump involved.
D. Examine Internal Parts - Periodically remove the head,
examine idler and bushing and head and pin for wear.
Replacing a relatively inexpensive idler bushing and idler
pin after only moderate wear will eliminate the need to
replace more expensive parts at a later date. Refer to TSM
on particular model series for procedure in removing head
of the pump. Be sure idler does not slide o󰀨 idler pin as
head is removed and drop and hurt someone or damage
the part.
E. Cleaning the Pump - A clean pump is easier to inspect,
lubricate, adjust, and runs cooler; plus, it looks better.
F. Storage - If pump is to be stored or not used for six
months or more, pump must be drained, and a light coat
of non-detergent SAE 30 weight oil must be applied to all
internal pump parts. Lubricate ttings and apply grease
to pump shaft extension. Viking suggests rotating pump
shaft by hand one complete revolution every 30 days to
circulate the oil. Retighten all gasketed joints before using
the pump.
RAPID WEAR
RAPID WEAR TABLE
CAUSE EVIDENCE POSSIBLE SOLUTION
1
ABRASIVES
Gouges or marks made
by large, hard particles;
a rapid wearing away
of bushings from very
small abrasives similar
to pumice; or anything
in between.
Flush the system with the pump
removed. Install strainer in suction
line. Oftentimes after a system
has run for a few cycles or a few
days, the dirt is pretty well cleaned
out, and if the pump is rebuilt into
good condition, it will then last for
a long time.
2
CORROSION
Rust, pitting or metal
appears to be “eaten”
away.
Check the Viking General
Catalog Liquid List for materials
of construction recommendation.
Consider whether all of the
materials used in pump
construction were attacked;
consider other materials used in
the system to determine how they
resisted the liquid. Check to see
whether or not the liquid has been
contaminated to make it more
corrosive than anticipated.
3
EXCEEDING
OPERATING
LIMITS
Noisy operation,
broken bushings,
twisted shaft, parts
show evidence of high
heat (discoloration).
Review General Catalog for
operating limits on particular model
involved.
4
INSUFFICIENT
EXTRA
CLEARANCE
Pump may stall.
Evidence of heavy
contact between end of
rotor teeth and head or
other parts.
Increase end clearance and/
or contact your Viking Pump
representative with details of the
application so that information
regarding proper extra clearance
may be provided.
5
LACK OF
LUBRICATION
Noisy bearings,
localized heating at
bearings or lip seal,
smoke, rapid bushing
wear.
Be sure all grease ttings are
greased before starting and
instructions for lubrication of
drive equipment are followed;
consider use of auxiliary lubricating
equipment.
6
MISALIGNMENT
Wear on only one part
of a surface, e.g., one
side of the casing, one
side of the packing
gland, only a portion of
the face of the head.
Double check alignment of drive
equipment and piping. Check the
alignment under conditions as
close to operating conditions as
possible.
7
RUN DRY
Pump stalls because
parts have uneven
expansion caused by
frictional heat; galling
between surfaces
having relative motion;
seal seats and idler
pins changing color
because of high heat.
Be sure there is liquid in the
system at the time of start up.
Provide some kind of automatic
alarm or shut-off if supply tank
runs dry.
TSM 1462 |Issue A |Page 16 of 18 Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

DO’S & DON’TS
Do’s and Don’ts for installation, operation, and maintenance
of Viking pumps to assure safe, long, trouble-free operation.
INSTALLATION
1. DO install pump as close to supply tank as possible.
2. DO leave working space around the pumping unit.
3. DO use large, short, and straight suction piping.
4. DO install a strainer in the suction line.
5. DO double check alignment after the unit is mounted and
piping is hooked up.
6. DO provide a pressure relief valve for the discharge side
of the pump.
7. DO cut out the center of gaskets used as port covers on
flanged port pumps.
8. DO record pump model number and serial number and file
for future reference.
OPERATION
1. DON’T run pump at speeds faster than shown in the
catalog for your model.
2. DON’T require pump to develop pressures higher than
those shown in the catalog for your model.
3. DON’T operate pumps at temperatures above or below
limits shown in the catalog for your pump.
4. DON’T operate pumps without all guards being in place.
5. DON’T operate pump without a relief valve on the pump or
in the discharge piping; be sure valve is mounted and set
correctly.
6. DON’T exceed catalog limits for temperature and
pressures of fluids in jacketed areas of pump.
7. DON’T use the pump in a system which includes a steam
blow or an air or vapor blow or purge without provision for
over-speed shutdown in case the pump starts to act as a
turbine and over-speeds the drive.
8. DON’T operate the pump with all of the liquid bypassing
through a pump mounted internal type relief valve or
without any flow of liquid going through the pump for more
than a couple of minutes. Operation under either of these
conditions may result in a heat build-up in the pump, which
could cause hazardous conditions or happenings.
MAINTENANCE
1. DO make sure any pump that has residual system
pressure in it or that has handled high vapor pressure
liquids, e.g., LP-gas, ammonia, Freons, etc. has been
vented through the suction or discharge lines or other
openings provided for this purpose.
2. DO make sure that if the pump is still hooked to the driver
while maintenance is being performed that the driver has
been “locked out” so that it cannot be inadvertently started
while work is being done on the pump.
3. DO make sure any pump that has handled a corrosive,
flammable, hot, or toxic liquid has been drained, flushed,
vented and/or cooled before it is disassembled.
4. DON’T drop parts during disassembly, e.g., idler can slip
from the pin as the head is removed from the pump; it may
drop on your foot, plus, it may get nicked or gouged.
5. DON’T stick fingers in the ports of a pump! Serious injury
may result.
6. DON’T spin the idler on the idler pin! Fingers may be
jammed between teeth and crescent.
7. DO remember that a few simple preventative maintenance
procedures such as periodic lubrication, adjustment of end
clearance, examination of internal parts, etc., will extend
the service life of your pump.
8. DO obtain, read and keep maintenance instructions
furnished with your pump.
9. DO have spare parts, pumps or standby units available,
particularly if the pump is an essential part of a key
operation or process.
TSM 1462 |Issue A |Page 17 of 18
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018

DECLARATION OF CONFORMITY
© 7/2018 Viking Pump Inc. All rights reserved.
WARRANTY
Viking pumps, strainers and reducers are warranted to be
free of defects in material and workmanship under normal
conditions of use and service. The warranty period varies by
type of product. A Viking product that fails during its warranty
period under normal conditions of use and service due to a
defect in material or workmanship will be repaired or replaced
by Viking. At Viking’s sole option, Viking may refund (in cash
or by credit) the purchase price paid to it for a Viking product
(less a reasonable allowance for the period of use) in lieu of
repair or replacement of such Viking product. Viking’s warranty
is subject to certain restrictions, limitations, exclusions and
exceptions. A complete copy of Viking’s warranty, including
warranty periods and applicable restrictions, limitations,
exclusions and exceptions, is posted on Viking’s website
(www.vikingpump.com/warranty/warranty-info). A complete
copy of the warranty may also be obtained by contacting
Viking through regular mail at Viking Pump, Inc., 406 State
Street, Cedar Falls, Iowa 50613, USA.
THIS WARRANTY IS AND SHALL BE VIKING’S SOLE
AND EXCLUSIVE WARRANTY AND IS IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ALL WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NON-INFRINGMENT, ALL OF WHICH
OTHER WARRANTIES ARE EXPRESSLY EXCLUDED.
THE RIGHTS AND REMEDIES UNDER THIS WARRANTY
ARE AND SHALL BE THE SOLE AND EXCLUSIVE RIGHTS
AND REMEDIES AGAINST VIKING. EXCEPT FOR THE
SPECIFIC LIABILITIES AND OBLIGATIONS PROVIDED
UNDER THIS WARRANTY, VIKING SHALL HAVE NO
LIABILITY OR OBLIGATION WITH RESPECT TO ANY
PRODUCT CLAIMED TO BE DEFECTIVE IN ANY MANNER.
UNDER NO CIRCUMSTANCES SHALL VIKING BE
LIABLE UNDER THIS WARRANTY OR OTHERWISE FOR
SPECIAL, INCIDENTAL, INDIRECT, CONSEQUENTIAL OR
PUNITIVE DAMAGES OF ANY KIND, INCLUDING, BUT NOT
LIMITED TO, LOST OR UNREALIZED SALES, REVENUES,
PROFITS, INCOME, COST SAVINGS OR BUSINESS, LOST
OR UNREALIZED CONTRACTS, LOSS OF GOODWILL,
DAMAGE TO REPUTATION, LOSS OF PROPERTY, LOSS
OF INFORMATION OR DATA, LOSS OF PRODUCTION,
DOWNTIME, OR INCREASED COSTS, IN CONNECTION
WITH ANY PRODUCT, EVEN IF VIKING HAS BEEN ADVISED
OR PLACED ON NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES AND NOTWITHSTANDING THE FAILURE OF
ANY ESSENTIAL PURPOSE OF ANY PRODUCT.
Declaration of Conformity for Viking Pump Chocolate
Pumps according to EC Directives 1935/2004 and 2023/2006
for Food Contact Applications
This is to certify that Viking 224A-CHC1 & 224A-CHC2 cast iron
chocolate pumps are designed specically for the chocolate industry.
All materials associated with these models are suitable for this type of
application according to Regulation (EC) Directive No 1935/2004 for
good contact materials.
As manufacturer and rst marketer, we declare that 224A-CHC1 &
224A-CHC2 pump series comply with the provisions of:
• the Directive 1935/2004/EC and 2023/2006
for food contact materials
• the foodstu󰀨s, Consumer Goods and Animal Feed Codes
(German LGFB)
• the Consumer Goods Ordinance (German BedGgstV)
It is certied that we manufacture our products on the basis of Good
Manufacturing Practice according to Ordinance (EC) 2023/2006
(GMP Directive) and that our products are marketable within the
European community.
Mike Strei
Engineering Director
May 3, 2018
VIKING PUMP, INC.
A Unit of IDEX Corporation
406 State Street
Cedar Falls, Iowa 50613 U.S.A.
Phone: [phone]
Fax: [phone]
Web: vikingpump.com
VISIT VIKINGPUMP.COM FOR PDF OF CURRENT TSM ISSUE & TO VIEW REPAIR VIDEOS
Viking Pump, Inc. • A Unit of IDEX Corporation • Cedar Falls, IA ©2018
TSM 1462
Page 18 of 18
Issue A
TECHNICAL SERVICE MANUAL
INSTALLATION, OPERATION & MAINTENANCE
CHOCOLATE PUMP: CAST IRON
SERIES: 224A-CHC1, 224A-CHC2
SIZES: H, HL, K, KK, LQ, LL, LS, Q, QS