Viking pump 124A Series Operating manual

TECHNICAL SERVICE MANUAL
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
SECTION TSM 630.2
PAGE 1 OF 12
ISSUE K
TECHNICAL SERVICE MANUAL
CONTENTS
INTRODUCTION
The illustrations used in this manual are for identification
purposes only and cannot be used for ordering parts. Obtain
a parts list from a Viking 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.
In the Viking model number system, basic size letters are
combined with series number (124A, 4124A, 4124AE, 126A,
4126A, 124AE, 124E, 123A, 4123A, 127A, 4127A, 224A,
4224A, 224AE, 4224AE, 226A, 4226A, 223A, 4223A, 227A,
4227A) indicating basic pump construction and material.
A = Universal Seal Pump
AE = Universal Seal Pump with larger rotor shaft (L, LQ, LL only)
E = Universal Seal with electric heating
FIGURE 3
Size QS illustrated
(Non-Jacketed)
Special Information . . . . . . . . . . . . . . . . . . . 3
Maintenance . . . . . . . . . . . . . . . . . . . . . . 3
Disassembly . . . . . . . . . . . . . . . . . . . . . . 4
Assembly . . . . . . . . . . . . . . . . . . . . . . . . 5
Mechanical Seal Replacement . . . . . . . . . . . . . 6
Seal Removal. . . . . . . . . . . . . . . . . . . . . 6
Seal Installation. . . . . . . . . . . . . . . . . . . . 7
Thrust Bearing Adjustment . . . . . . . . . . . . . . . 8
Installation of Carbon Graphite Bushings . . . . . . . . 9
Pressure Relief Valve Instructions . . . . . . . . . . . 9
Disassembly . . . . . . . . . . . . . . . . . . . . .10
Assembly . . . . . . . . . . . . . . . . . . . . . . .10
Pressure Adjustment . . . . . . . . . . . . . . . . .10
Heat Cartridges . . . . . . . . . . . . . . . . . . . . .10
FIGURE 2
Size Q illustrated
(Non-Jacketed)
FIGURE 1
Size LS illustrated
(Shown with jacketed bracket and relief valve)
UNMOUNTED PUMP
UNITS
Non-Jacketed Jacketed
Packed Mech. Seal Packed Mech. Seal
LS124A
LS124E
LS126A
LS123A
LS127A
Q124A
Q124E
Q126A
Q123A
Q127A
QS124A
QS124E
QS126A
QS123A
QS127A
M124A
LS4124A
LS4126A
LS4123A
LS4127A
Q4124A
Q4126A
Q4123A
Q4127A
QS4124A
QS4126A
QS4123A
QS4127A
M4124A
LS224A
LS226A
LS223A
LS227A
Q224A
Q226A
Q223A
Q227A
QS226A
QS223A
QS227A
M224A
LS4224A
LS4226A
LS4223A
LS4227A
Q4224A
Q4226A
Q4223A
Q4227A
QS4226A
QS4223A
QS4227A
M224A
Units are designated
by the unmounted
pump model numbers
followed by a letter
indicating drive style.
V = V-Belt
D = Direct Connected
R = Viking Speed
Reducer
P = Commercial
Speed Reducer
Model Chart Number
Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com
UNIVERSAL SEAL HEAVY DUTY PUMPS
SERIES 124A/AE, 4124A/AE, 124E, 224A, & 4224A CAST IRON
SERIES 126A, 4126A, 226A & 4226A DUCTILE IRON
SERIES 123A, 4123A, 223A & 4223A STEEL
SERIES 127A, 4127A, 227A & 4227A STAINLESS STEEL
SIZES LS, Q, QS & M

SECTION TSM 630.2 ISSUE K PAGE 2 OF 12
BEFORE opening any liquid chamber (pumping
chamber, reservoir, relief valve adjusting cap fitting,
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.
BEFORE operating the pump, be sure all drive guards
are in place.
DO NOT operate pump if the suction or discharge
piping is not connected.
DO NOT place fingers 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.
DO NOT exceed the pumps rated pressure, speed, and
temperature, or change the system/duty parameters
from those the pump was originally supplied, without
confirming its suitability for the new service.
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 flow.
INSTALL pressure gauges/sensors next to the
pump suction and discharge connections to monitor
pressures.
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.
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.
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.
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
flow or regulate discharge pressure. For additional
information, refer to Viking Pump’s Technical Service
Manual TSM 000 and Engineering Service Bulletin
ESB-31.
THE PUMP must be installed in a matter that allows
safe access for routine maintenance and for inspection
during operation to check for leakage and monitor
pump operation.
WARNING
SAFETY INFORMATION AND INSTRUCTIONS
Danger - Failure to follow the indicated
instruction may result in serious injury
or death.
Warning - In addition to possible serious
injury or death, failure to follow the
indicated instruction may cause damage
to pump and/or other equipment.
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.
WARNING
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SECTION TSM 630.2 ISSUE K PAGE 3 OF 12
MAINTENANCESPECIAL INFORMATION
This manual deals only with Series 124A, 4124A, 124AE,
4124AE, 124E, 126A, 4126A, 123A, 4123A, 127A, 4127A,
224A, 4224A, 226A, 4226A, 223A, 4223A, 227A and 4227A
Heavy Duty Bracket Mounted Pumps. Refer to Figures 1
through 13 for general configuration and nomenclature used
in this manual. Pump specifications and recommendations
are listed in Catalog Section 630, Heavy Duty Bracket
Mounted Pumps, with Universal Seal Type Bracket.
ROTATION: Viking pumps operate equally well in a
clockwise or counterclockwise rotation. Shaft rotation
determines which port is suction and which is discharge.
Port in area where pumping elements (gear teeth) come out
of mesh is suction port.
PRESSURE RELIEF VALVES:
1. Viking pumps are positive displacement pumps and must
be provided with some sort of pressure protection. This
may be a relief valve mounted directly on the pump, an
inline pressure relief valve, a torque limiting device or a
rupture disk.
2. There are relief valve options available on those pump
models designed to accept a relief valve. Options may
include a return to tank relief valve and a jacketed relief
valve. Pumps equipped with a jacketed head plate are
generally not available with a relief valve.
3. If pump rotation is reversed during operation, pressure
protection must be provided on both sides of pump.
4. 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.
5. Pressure relief valves cannot be used to control pump
flow or regulate discharge pressure.
For additional information on pressure relief valves, Refer to
Technical Service Manual TSM000 and Engineering Service
Bulletin ESB-31.
SPECIAL MECHANICAL SEALS:
Extra care should be taken in repair of these pumps. Be sure
to read and follow all special instructions supplied with your
pump.
Viking 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 all lubrication fittings every 500 hours
of operation with multi-purpose grease, NLGI # 2. Refer to
Engineering Service Bulletin ESB-515. Consult factory
with specific lubrication questions. Applications involving
very high or low temperatures will require other types of
lubrication.
PACKING ADJUSTMENT: New packed pumps require
initial packing adjustment to control leakage as packing “runs
in”. Make initial adjustments carefully and do not over-tighten
packing gland. After initial adjustment, inspection will reveal
need for packing replacement. Refer to instructions under
Assembly on page 5, regarding repacking pump.
CLEANING PUMP: Keep pump as clean as possible. This
will facilitate inspection, adjustment and repair work and help
prevent overlooking a dirt covered grease fitting.
STORAGE: If pump is to be stored, or not used for six months
or more, pump must be drained and a light coat of light oil
must be applied to all internal pump parts.
Lubricate fittings and apply grease to pump shaft extension.
Viking suggests rotating pump shaft by hand one complete
revolution every 30 days to circulate the oil.
SUGGESTED REPAIR TOOLS: The following tools must be
available to properly repair Universal Seal Bracket 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. Packing hooks, flexible (packed pumps)
4. Mechanical seal installation sleeve
2-751-005-630 for 2.4375 inch seal; Q-QS pumps.
5. Bearing locknut spanner wrench
(Source: #472 J. H. Williams & Co. or equal);
LS-QS pumps.
6. Spanner wrench, adjustable pin type for use on bearing
housing (Source: #482 J. H. Williams & Co. or equal)
7. Brass bar
8. Arbor press
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve
adjusting cap fitting, 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.

SECTION TSM 630.2 ISSUE K PAGE 4 OF 12
FIGURE 4 –EXPLODED VIEW OF UNIVERSAL BRACKET PUMP (TYPICAL)
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1Locknut 17 Packing Gland Capscrew 39 Idler Pin
2Lockwasher 19 Packing 40 Head and Pin Assembly
3End Cap for Bearing Housing 25 Bracket Bushing 43 Stud for Head
4Bearing Spacer Collar (Outer) 27 Bracket and Bushing Assembly 44 Nut for Head
5Lip Seal for Bearing Housing (2 Req’d) 28 Capscrew for Bracket 45 Relief Valve Gasket
6Roller Bearing (2 Req’d) 29 Bracket Gasket 46 Capscrew for Relief Valve
7Bearing Housing 30 Pipe Plug 47 Internal Relief Valve
8Bearing Spacer Collar (Inner) 31 Casing 48 Heater Cartridges for Bracket (124E Pumps Only)
12 Grease Fitting 34 Pipe Flange Gasket 49* Heater Cartridges for Head (124E Pumps Only)
13 Mechanical Seal 35 Head Gasket 50 Packing Gland Washer (2 Req'd) (Q, QS, M Only)
13B Cartridge Mechanical Seal 36 Rotor and Shaft Assembly 51 Stud for Flanges
15 Packing Gland 37 Idler and Bushing Assembly 52 Nut for Flanges
16 Packing Gland Nut 38 Idler Bushing Not Illus. Cover Plate, Relief Valve
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.
* The number of Heater Cartridges for Head varies by pump size. See Table 2 on Page 13 for the number required by pump size.
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve
adjusting cap fitting, 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.
Remove head from pump. Do not allow idler to fall from
idler pin. Tilt top of head back when removing to prevent
this. Avoid damaging head gasket. If pump is furnished
with pressure relief valve, it need not be removed from
head or disassembled at this point. Refer to Pressure
Relief Valve Instructions, page 9.
If 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 idler and bushing assembly.
3. Insert 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.
4. Loosen two setscrews in the face of the bearing housing
and remove the bearing housing assembly from the
bracket. Refer to Figure 5 or 6, page 5.
5. Remove pair of half round rings under the inner spacer
collar from the shaft. NOTE: There are no half round rings
on Q, QS and M size pumps.
6. Remove packing gland capscrews, slide packing gland
out of stuffing box, and remove packing.
NOTE: Reference Mechanical Seal Replacement
beginning on page 6 when disassembling seal pump with
mechanical seal.
7. Carefully remove rotor and shaft to avoid damaging
bracket bushing.

SECTION TSM 630.2 ISSUE K PAGE 5 OF 12
FIGURE 5
LS BEARING HOUSING ASSEMBLY
FIGURE 6
Q-M BEARING HOUSING ASSEMBLY
8. Loosen two radial setscrews in flange of bearing housing
and with a spanner wrench remove the outer end cap with
closure and outer bearing spacer collar.
9. Remove the double row ball bearing, (2 tapered roller
bearings on Q, QS and M sizes), closure and inner
bearing spacer collar from the bearing housing.
10.Clean all parts thoroughly and examine for wear and
damage. Check lip seals, bearings, bushings, and idler
pin and replace if necessary. Check all other parts for
nicks, burrs, excessive wear and replace if necessary.
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.
CAUTION: Do not intermix inner and outer races of tapered
roller bearing (Q, QS and M 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.
1. Install bracket bushing. If bracket bushing has an inner
lubrication groove, install bushing with groove at six
o’clock position in bracket. If carbon graphite, Refer to
Installation of Carbon Graphite Bushings, page 9.
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.
ASSEMBLY
3. Coat idler pin with light oil and place idler and bushing on
idler pin in head. If replacing with carbon graphite bushing,
Refer to Installation of Carbon Graphite Bushings,
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 and 6 for bearing housing assembly.
5. Install the lipseal in the bearing housing (See the
appropriate figure for lip orientation).
6. “LS” Pumps: Pack the ball bearing with grease and push
or press the bearing into the bearing housing. Refer to
Figure 5.
Q, QS and M Size Pumps: 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 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 & M SIZE PUMPS 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. Back the end cap off to allow inner races to
rotate with slight resistance.
Lock end cap in place with two setscrews in the flange of
the bearing housing.
TAPERED ROLLER BEARING
BALL BEARING BEARING HOUSING
SETSCREW
SPACER COLLAR
SHAFT
LIPSEAL
END CAP
HALF ROUND RINGS
BRACKET
SETSCREW
BEARING HOUSING
SPACER COLLAR
SHAFT
LIPSEAL
END CAP
LIPSEAL
SETSCREW
SPACER
COLLAR
SETSCREW

SECTION TSM 630.2 ISSUE K PAGE 6 OF 12
This manual deals with the three standard types of mechanical
seals supplied on Universal Bracket models 4124A, 4126A,
4123A, 4127A, 4224A, 4224AH, 4226A, 4223A, 4227A.
1. Cartridge (Figure 7)
2. Elastomeric Bellows (Figure 9, page 7)
3. PTFE Wedge (Figure 10, page 7)
Identification of seal type is an important step towards proper
maintenance. For mechanical seal types not shown, see the
Seal Instruction Drawing (SID) furnished with the pump or
contact a Viking representative.
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.
MECHANICAL SEAL REPLACEMENT
SEAL REMOVAL
FIGURE 7
CARTRIDGE MECHANICAL SEAL
8. When assembling packed pump, use packing suitable
for liquid being pumped. Install packing, staggering the
joints from one side of shaft to other. Lubricate packing
rings with oil, grease, or graphite to aid assembly. Install
packing, capscrews, washers (Q, QS, M only) and nuts.
Make sure gland is installed square and nuts are tightened
evenly. Tighten nuts until packing gland is snug against
packing.
NOTE: See Seal Installation, page 7 when reassembling
a pump with mechanical seal.
9. Slide inner spacer collar over shaft with recessed end
facing rotor. Q, QS and M bearing spacer collars are not
recessed.
Place pair of half round rings on shaft and slide inner
bearing spacer collar over half round rings to lock them in
place. There is no pair of half round rings on Q, QS and M
size pumps.
10. Thread the bearing housing with lipseals; end cap, outer
bearing spacer collar and bearings installed into bracket.
11. 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 to 120-
150 - ft.lbs. torque (LS) or 170-190 - ft.lbs. torque (Q,
QS and M) . 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.
12.Adjust pump end clearance as in Thrust Bearing
Adjustment page 8.
13.Lubricate all grease fittings with multi-purpose grease,
NLGI #2.
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve
adjusting cap fitting, 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.
VENT CONNECTION CARTRIDGE
MECHANICAL
SEAL
CENTER
CLIPS
SEAL
COLLAR
NUT
CAPSCREW

SECTION TSM 630.2 ISSUE K PAGE 7 OF 12
Cartridge mechanical seals are designed so that they may
be replaced with minimal pump and piping disassembly. The
seal may be accessed by removing the bearing housing.
(See Disassembly, Steps 3-5, page 4).
1. Remove any flush or barrier fluid tubes connected to the
seal gland.
2. Loosen setscrews on the seal collar to free the cartridge
seal from the shaft.
3. Remove the two gland capscrews and slide the cartridge
seal out through the bearing housing opening.
If the pump is to be disassembled further, refer to
Disassembly, page 4.
Elastomeric bellows and PTFE wedge seals generally require
pump disassembly to be replaced (See Disassembly, steps
1-5, page 4).
1. Loosen nuts and remove seal plate, seal plate holder,
seal seat and seal gasket(s).
2. Loosen setscrew in set collar (bellows) or mechanical
seal rotary member (wedge). NOTE: Piping and/or plugs
will need to be removed to access setscrews.
3. The remainder of the mechanical seal may be removed in
conjunction with Step 7 of Disassembly, page 4.
ELASTOMERIC BELLOWS
AND PTFE WEDGE TYPE
CARTRIDGE TYPE
SEAL INSTALLATION
COAT ROTOR SHAFT, TAPERED INSTALLATION
SLEEVEAND INNER DIAMETER OF MECHANICAL
SEAL WITH LIGHT OIL BEFORE ASSEMBLY.
FIGURE 8
1. NOTE: Burrs left on shaft can damage O-ring on seal
sleeve during installation. Inspect shaft for burrs and
remove any found with a fine grade of emery cloth.
2. Clean rotor shaft and face of seal chamber.
3. Slide cartridge seal on shaft until it contacts the seal
chamber face.
4. Follow steps 9-12 on page 6 under Assembly.
5. Insert gland capscrews and secure gland to bracket face.
NOTE: Turn shaft several turns while gland is loose to
center seal; then tighten gland tight enough to compress
gasket. Tighten only enough to contain leakage and not to
distort gland.
6. Lock cartridge seal drive collar to shaft and remove or
turn centering clips out of the way so as to clear the drive
collar.
7. Turn shaft by hand or jog motor to check drive collar for
runout.
8. Connect circulation line or vent stuffing box seals without
line until liquid is present on start up.
NOTE: For maximum seal life, circulation line should
be used.
CARTRIDGE TYPE
FIGURE 9
ELASTOMERIC BELLOWS SEAL
CIRCULATION LINE
CONNECTION
SEAL ACCESS
HOLE
MECHANICAL SEAL
(ROTARY MEMBER)
SEAT GASKET
SEAL HOLDER
(NOT USED ON LS)
SEAL PLATE
(PACKING GLAND
ON LS)
NUT
CAPSCREW
SEAL SEAT
SET COLLAR
ASSEMBLY
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.
TAPERED INSTALLATION SLEEVE
Q, QS & M SIZES
SHAFT

SECTION TSM 630.2 ISSUE K PAGE 8 OF 12
For complete pump assembly instructions, see Assembly,
page 5.
1. Clean rotor shaft and seal housing bore. Make sure they
are free of dirt, grit and scratches. Gently radius leading
edge of shaft diameter over which seal is to be placed.
NOTE: Never touch mechanical seal faces with anything
except clean hands or clean cloth. Minute particles can
scratch the seal faces and cause leakage.
2. Place tapered installation sleeve on the shaft (See Figure
11). Q, QS & M sizes only.
3. Coat outside of tapered installation sleeve and inside of
rotary member of the seal with a generous quantity of light
oil. Grease is not recommended.
4. Start rotary member on shaft (including seat collar and
screws on bellows seal) and ease over tapered sleeve
(See Figure 11).
ELASTOMERIC BELLOWS & PTFE
WEDGE TYPE - Q, QS & M SIZES
FIGURE 11
FIGURE 10
PTFE WEDGE SEAL
NOTE: Some PTFE wedge seals are equipped with
holding clips, which compress the seal springs. Remove
holding clips to release springs after seal is installed on
shaft.
5. Move rotary member so set screws are directly below seal
access holes on side of bracket (See Figure 9, page 7
and Figure 10). Tighten all setscrews securely to shaft.
NOTE: Be sure that the rotor and shaft are positioned
against the head before tightening set screws.
6. FOR “O-RING” GASKET TYPE MECHANICAL SEAL
SEAT (BELLOWS SEAL): Lubricate outer diameter of
O-ring seal gasket with oil. Flush sealing faces of both
rotary member and seal seat with oil and press seal seat
into bore until back, unlapped face, is flush with bore.
Install seal holder, seal plate, capscrews, and nuts and
tighten securely.
FOR “CLAMPED-IN” TYPE MECHANICAL SEAL SEAT
(WEDGE SEAT): Flush sealing faces of both rotary
member and seal seat with oil and install seal seat and
seat gasket over end of shaft against machined bracket
face. Install other seal gasket, seal holder, seal plate,
capscrews and nuts and fasten securely.
7. Remove tapered installation sleeve.
8. Connect circulation line or vent stuffing box for seals
without flush line until liquid is present on start up.
NOTE: For maximum seal life, circulation line should
be used.
Refer to Assembly, page 5 to complete assembly.
1. Loosen the two set screws in the outer face of the bearing
housing and turn this thrust bearing assembly clockwise
until it can no longer be turned by hand. Back off counter-
clockwise until the rotor shaft can be turned by hand with
a slight noticeable drag.
2. For standard end clearance, back off the thrust bearing
assembly the required length measured on the outside
diameter of the bearing housing. See Table 1, page 9.
3. Tighten the two self-locking type “Allen” set screws, in the
outboard face of the bearing housing, with equal force
against the bracket. Your pump is now set with standard
end clearances and locked.
NOTE: Be sure the shaft can rotate freely. If not, back off
additional length on outside diameter and check again.
4. High viscosity liquids required additional end clearances.
The amount of extra end clearance depends on
the viscosity of the liquid pumped. For specific
recommendations, consult the factory. Table 1 shows the
additional bearing housing adjustment required for .001”
increase in end clearance.
THRUST BEARING ADJUSTMENT
SHAFT
MECHANICAL SEAL
ROTARY MEMBER
FLUSH CONNECTION
SEAL ACCESS HOLE
MECHANICAL SEAL
(ROTARY MEMBER)
SEAL SEAT
SEAL HOLDER
SEAL PLATE
NUT
CAPSCREW
SEAL GASKET
TAPERED INSTALLATION SLEEVE

SECTION TSM 630.2 ISSUE K PAGE 9 OF 12
PUMP
SIZE MODEL
STANDARD
END
CLEARANCE
(Inch)
TURN BRG.
HOUSING
C.C.W.
LENGTH ON
O.D.
(Inch)
ADDITIONAL
LENGTH ON
O.D. BRG.
HOUSING FOR
.001” END CL.
(Inch)
LS
124A
4124A
126A
4126A
123A
4123A
.005 1.25
.25
224A
4224A
226A
4226A
223A
4223A
124E
.010 2.50
127A
4127A .010 2.50
227A
4227A .020 5.00
Q
QS
M
124A
4124A
126A
4126A
123A
4123A
.010 3.10
.31
224A
4224A
226A
4226A
223A
4223A
124E
.015 4.65
127A
4127A .010 3.10
227A
4227A .020 6.20
TABLE 1
When installing carbon graphite bushings, extreme care
must be taken to prevent breaking. Carbon graphite is a
brittle material and easily cracked. If cracked, the bushing will
quickly disintegrate. Using a lubricant and adding a chamfer
on the bushing and the mating part will help in installation.
The additional precautions listed below must be followed for
proper installation.
1. A press must be used for installation.
2. Be certain bushing is started straight.
3. Do not stop pressing operation until bushing is in proper
position. Starting and stopping will result in a cracked
bushing.
4. Check bushing for cracks after installation.
INSTALLATION OF CARBON
GRAPHITE BUSHINGS
PRESSURE RELIEF VALVE
INSTRUCTIONS
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet 10. Bonnet Gasket
FIGURE 12
SIZE LS
Carbon graphite bushings with extra interference fits are
frequently furnished for high temperature operation. These
bushings must be installed by a shrink fit.
1. Heat bracket or idler to 750ºF.
2. Install cool bushing with a press.
3. If facilities are not available to reach 750ºF temperature,
it is possible to install with 450ºF temperature; however
the lower the temperature the greater the possibility of
cracking the bushing.
4. Consult factory with specific questions on high
temperature applications. Refer to Engineering Service
Bulletin ESB-3.
VALVE - LIST OF PARTS
1. Valve Cap 6. Valve Body
2. Adjusting Screw 7. Valve Spring
3. Lock Nut 8. Poppet
4. Spring Guide 9. Cap Gasket
5. Bonnet 10. Bonnet Gasket
FIGURE 13
SIZES Q AND QS

SECTION TSM 630.2 ISSUE K PAGE 10 OF 12
Mark valve and head before disassembly to insure proper
reassembly.
1. Remove valve cap.
2. Measure and record length of extension of adjusting
screw. Refer to “A” on Figure 12 and Figure 13, page
9.
3. Loosen locknut and back out adjusting screw until spring
pressure is released.
4. Remove bonnet, spring guide, spring and poppet from
valve body. Clean and inspect all parts for wear or damage
and replace if necessary.
Reverse procedures outlined under Disassembly. If valve
is removed for repairs be sure to replace in same position.
Relief valve adjusting screw cap must always point towards
suction side of pump. If pump rotation is reversed, remove
relief valve and turn end for end.
DISASSEMBLY
ASSEMBLY
If a new spring is installed or if pressure setting of pressure
relief valve is to be changed from that which the factory has
set, the following instructions must be carefully followed.
1. Carefully remove valve cap, which covers adjusting
screw.
2. Loosen locknut (which locks adjusting screw so pressure
setting will not change during operation of pump).
3. Install a pressure gauge in discharge line for actual
adjusting operation.
4. Turn adjusting screw in to increase pressure and out to
decrease pressure.
5. With discharge line closed at point beyond pressure
gauge and pump running, gauge will show maximum
pressure that the valve will allow (full bypass).
In ordering parts for pressure relief valve, always give
model number and serial number of pump as it appears on
nameplate and name of part wanted. When ordering springs,
be sure to give pressure setting desired.
PRESSURE ADJUSTMENT
IMPORTANT
INSTALLATION INSTRUCTIONS:
ASSEMBLY
WARNING !
The pump needs to be properly grounded
before the heat cartridges are installed.
WARNING !
Setting the set point temperature higher
than necessary will not make the pump
heat any faster and will shorten the life of
the heat cartridges.
DANGER !
• Always disconnect, lockout, and tag
out supply circuits prior to installing.
• The installation must comply with
standard and local regulations.
• All wiring should be done by a licensed
electrician to meet local codes.
• Study this manual thoroughly before
installing and using the heat cartridges.
• Pay special attention to this section
and the parts marked “WARNING!” or
“DANGER”.
• Should questions or uncertainties
arise, please contact your authorized
Viking distributor.
Failure to follow these instructions may
cause an electrical shock and/or sparks,
which may result in serious injury or
death.
1. Spacers should be installed between the foot of the pump
and the base. This will create an air gap between the
pump and base to limit heat transfer to the base.
2. Coat the threads of the heat cartridge with an anti-seize
compound prior to installation. Install heat cartridges into
the tapped ports on the head and bracket in the locations
shown in the Figure 13 below. Figure 13 also shows the
minimum clearance around the pump needed to install
and remove the heat cartridges as well as the location
for the thermocouple. The number of heaters used and
the total wattage for each pump size is given in Table
2 below. 3/8” heat cartridges should be tightened to
10 ft-lbs. ½” and ¾” heat cartridges should be tightened
to 20 ft-lbs.
3. Viking recommends installing a closed loop temperature
controller with a control algorithm that will minimize or
prevent overshooting the set point temperature. The set
point temperature needs to be slightly higher than the
melting point and significantly lower than the flash point
or boiling point of the liquid being pumped. Viking does
offer a controller for use with our heat cartridges. Ask your
local Viking distributor for details.
4. Properly insulate the pump to minimize heat loss. The
pump will not heat properly if it is not insulated.
This section applies to 124E Series only.
HEAT CARTRIDGES

SECTION TSM 630.2 ISSUE K PAGE 11 OF 12
NOTE:
1. Heat cartridges, temperature probes, and controllers must
be wired by a licensed electrician to meet local codes.
2. Heat cartridges require 240VAC, 1 Phase, 60 Hz or
220VAC, 1 Phase, 50 Hz power supply.
3. Heat cartridges are UL, CSA, & CE marked, RoHs
compliant.
4. Heat cartridges and cables are water resistant but not
water proof. They need to be installed in a protected area.
5. To make sure that the liquid within the pump is melted and
to avoid damage to the pump, do not start the pump until
the set point temperature has been reached.
6. Several factors such as the size of pump, the set point
temperature, and the insulation will affect the amount
of time it will take for the pump to reach the set point
temperature. Typically it will take 3-4 hours for the pump
to reach its set point temperature.
7. Do not use heat cartridges with different watt densities
from those supplied by Viking. Changing watt densities
may result in localized over or under heating.
8. The thermocouple or temperature probe must be installed
in the bracket location shown in Figure 13 below. Any other
location may result in localized over or under heating.
9. Please see TSM 630.4 for technical information on the
Viking supplied controller for the heat cartridges.
10.The wires for the heat cartridges can be joined together in
a junction box, and a single wire from the junction box can
be connected to the controller.
11. WARNING Heat cartridges will be hot. Do not touch pump
or heat cartridges until they have been allowed to cool.
FIGURE 13 - HEAT CARTRIDGE AND THERMOCOUPLE LOCATIONS
TABLE 2- NUMBER OF HEAT CARTRIDGES IN EACH PUMP MODEL
* The thermocouple location for the LS size is
located on the opposite side of the bracket as
shown in the drawing.
Dimensions - LS through QS Sizes – Electrically Heated – Non Jacketed
(Top View)
Wattage by Pump Size
Pump Size Number of Heaters in Head Number of Heaters in Bracket Total Wattage
LS 2 2 1250
Q 3 2 2200
QS 3 2 2200
Model
Bracket Heater to Port
Center Line (DD)
Temp Probe to Port
Center Line (CC)
Head Heater to Port
Center Line (EE)
Required to Remove Heater
(AA) (BB)
Inch mm Inch mm Inch mm Inch mm Inch mm
LS124E 6.09 154.69 6.25 158.75 6.44 163.58 7.00 177.80 6.50 165.10
Q124E 5.83 148.08 7.33 186.18 8.25 209.55 9.25 234.95 7.75 196.85
QS124E 6.33 160.78 7.83 198.88 9.25 234.95
AA
BB
EE
DD
CC
Thermocouple

TECHNICAL SERVICE MANUAL
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
© 8/2017 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.
SECTION TSM 630.2
PAGE 12 OF 12
ISSUE K
UNIVERSAL SEAL HEAVY DUTY PUMPS
SERIES 124A/AE, 4124A/AE, 124E, 224A, & 4224A CAST IRON
SERIES 126A, 4126A, 226A & 4226A DUCTILE IRON
SERIES 123A, 4123A, 223A & 4223A STEEL
SERIES 127A, 4127A, 227A & 4227A STAINLESS STEEL
SIZES LS, Q, QS & M