Dover PSG Blackmer LGL154A Manual

BLACKMER LIQUEFIED GAS PUMPS 960437
INSTRUCTIONS NO. 501-K00
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
MODELS: LGL154A, LGL156A, LGL158B
Section
Effective
Replaces
501
Jan 2014
July 2013
And Discontinued LGL158A
Patent Protected by U.S. Patent 6030191 and Related Foreign Patents.
TABLE OF CONTENTS Page
SAFETY DATA 1
PUMP DATA 2
Technical Data 2
Initial Start Up Information 2
INSTALLATION AND OPERATION 2
Pre-Installation Cleaning 3
Location and Piping 3
Pump Mounting 3
Coupling Alignment 4
Internal Pump Relief Valve and Bypass Valve 4
Pump Rotation 4
To Reverse Pump Rotation 4
Underground Tank Applications 5
Pre-Start Up Check List 6
Start Up Procedures 6
MAINTENANCE 7
Torque Table 7
Strainers 7
Lubrication 7
Vane Replacement 7
Pump Disassembly 8
Parts Replacement 8
Pump Assembly 9
TROUBLESHOOTING 11
NOTE: Numbers in parentheses following individual parts
indicate reference numbers on Blackmer Parts List 501-K01.
Blackmer pump manuals and parts lists may be obtained from
Blackmer's website (www.blackmer.com) or by contacting
Blackmer Customer Service.
SAFETY DATA
This is a SAFETY ALERT SYMBOL.
When you see this symbol on the product, or in the
manual, look for one of the following signal words and be
alert to the potential for personal injury, death or major
property damage
Warns of hazards that WILL cause serious personal
injury, death or major property damage.
Warns of hazards that CAN cause serious personal
injury, death or major property damage.
Warns of hazards that CAN cause personal injury
or property damage.
NOTICE:
Indicates special instructions which are very
important and must be followed.
NOTICE:
Blackmer liquefied gas pumps MUST only be installed in
systems which have been designed by qualified
engineering personnel. The system MUST conform to all
applicable local and national regulations and safety
standards.
This manual is intended to assist in the installation and
operation of the Blackmer liquefied gas pumps, and
MUST be kept with the pump.
Blackmer liquefied gas pump service shall be performed
by qualified technicians ONLY. Service shall conform to
all applicable local and national regulations and safety
standards.
Thoroughly review this manual, all Instructions and
hazard warnings, BEFORE performing any work on the
Blackmer liquefied gas pumps.
Maintain ALL system and Blackmer liquefied gas pump
operation and hazard warning decals.
Discontinued Models - Parts availability may be limited (July 2014)
_1401

501-K00 Page 2/12
SAFETY DATA
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
severe personal injury or death
Failure to disconnect and lockout
electrical power before attempting
maintenance can cause shock, burns or
death
Hazardous
machinery can
cause serious
personal injury.
Hazardous voltage.
Can shock, burn or
cause death.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury or property damage.
Failure to relieve system pressure prior
to performing pump service can cause
serious personal injury or property
damage. Systems with meters will still
be pressurized even after the hose is
emptied
Hazardous pressure
can cause serious
personal injury or
property damage
Hazardous pressure
can cause serious
personal injury or
property damage
If pumping hazardous or toxic fluids,
system must be flushed and
decontaminated, inside and out, prior to
performing service or maintenance
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Hazardous or toxic
fluids can cause
serious injury.
Do not operate
without guard
in place
PUMP DATA
PUMP IDENTIFICATION
A pump Identification tag, containing the pump serial number, I.D. number, and model designation, is attached to each pump. It is
recommended that the data from this tag be recorded and filed for future reference. If replacement parts are needed, or if
information pertaining to the pump is required, this data must be furnished to a Blackmer representative.
TECHNICAL DATA
Maximum Pump Speed 1750 RPM
Maximum Operating Temperature 240°F
(115°C)
Maximum Differential Pressure
LGL158: 200 PSI (13.8 Bar)
LGL156: 160 PSI (11.0 Bar)
LGL154: 140 PSI (9.6 Bar)
Maximum Working Pressure 425 PSI
(29.3 Bar)
 Technical Data is for standard materials of
construction. Consult Blackmer Material Specs for
optional materials of construction.
 These pumps are listed by Underwriters’ Laboratories
for liquefied petroleum gas (LPG) service
INITIAL PUMP START UP INFORMATION
Model No.: ____________________________________
Serial No.: ____________________________________
ID No.: _______________________________________
Date of Installation: _____________________________
Inlet Gauge Reading: ____________________________
Discharge Gauge Reading: _______________________
Flow Rate: _____________________________________

501-K00 Page 3/12
INSTALLATION
NOTICE:
Blackmer pumps must only be installed in systems
designed by qualified engineering personnel. System
design must conform with all applicable regulations and
codes and provide warning of all system hazards.
NOTICE:
This pump shall be installed in accordance with the
requirements of NFPA 58 all applicable local, state and
national regulations.
Install, ground and wire to local and
National Electrical Code requirements.
Install an all-leg disconnect switch near
the unit motor.
Disconnect and lockout electrical power
before installation or service
Electrical supply MUST match motor
nameplate specifications.
Hazardous voltage.
Can shock, burn or
cause death.
Motors equipped with thermal protection automatically
disconnect motor electrical circuit when overload exists.
Motor can start unexpectedly and without warning.
PRE-INSTALLATION CLEANING
NOTICE:
New pumps contain residual test fluid and rust inhibitor.
If necessary, flush pump prior to use.
Foreign matter entering the pump WILL cause extensive
damage. The supply tank and intake piping MUST be
cleaned and flushed prior to pump installation and operation.
LOCATION AND PIPING
Pump life and performance will be significantly reduced when
installed in an improperly designed system. Before starting
the layout and installation of the piping system, review the
following suggestions:
1. Locate the pump as near as possible to the source of
supply to avoid excessive inlet pipe friction.
2. The inlet piping and fittings should be at least as large as
the intake port on the pump. It should slope downward to
the pump, and should not contain any upward loops.
Minimize the number of intake line fittings and eliminate
restrictions such as sharp bends; globe valves,
unnecessary elbows, and undersized strainers.
3. A strainer must be installed in the inlet line to protect the
pump from foreign matter. The strainer should be located
at least 24" (0.6m) from the pump, and have a net open
area of at least four times the area of the intake piping.
Strainers must be cleaned regularly to avoid pump
starvation. (Strainers are optional when pumping from
underground tanks.)
4. The intake and discharge piping system must be free of
all leaks.
5. Expansion joints, placed at least 36" (0.9m) from the
pump, will compensate for expansion and contraction of
the pipes. Contact the flexible connector/hose
manufacturer for required maintenance/care and design
assistance in their use.
6. ALL piping and fittings MUST be properly supported to
prevent any piping loads from being placed on the pump.
7. Check alignment of pipes to pump to avoid strains which
might later cause misalignment. See Figure 1. Unbolt
flanges or break union joints. Pipes should not spring
away or drop down. After pump has been in operation
for a week or two, completely recheck alignment.
Figure 1
8. Install pressure gauges in the NPT ports provided in the
pump casing to check pump performance at start up.
9. The use of a 1.5” or 2” vapor return line will speed
delivery by preventing pressure build up at the receiving
tank and pressure reduction in the supply tank.
10. Keeping the liquefied gas systems full of liquid, even
when idle, will keep the O-rings from changing shape,
shrinking or super cooling. Evaporation of liquefied gas
leaves an abrasive powder on the surface which can
cause wear to the pump, meter, and seals.
PUMP MOUNTING
Permanently mount the unit by securing the base plate with
adequately sized anchor bolts to a level concrete floor
following recommended industry standards (See Figure 2). A
solid foundation will reduce system noise and vibration, and
will improve pump performance. Refer to ANSI/HI standards
or a suitable pump handbook for information on typical pump
mounting and foundations. Check coupling alignment after
pump and base assembly is secured to the foundation.
BOLT
BASE
STANDARD
PIPE
WASHER
Figure 2. Foundation Anchor
When installing units built on channel or structural steel type
bases, use care to avoid twisting the base out of shape when
anchor bolts are tightened. Shims should be used under the
edges of the base prior to tightening of the anchor bolts to
prevent distortion.

501-K00 Page 4/12
INSTALLATION
COUPLING ALIGNMENT
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard
in place
The pump must be directly coupled to a gear reducer and/or
driver with a flexible coupling. Verify coupling alignment after
installation of new or rebuilt pumps. Both angular and parallel
coupling alignment MUST be maintained between the pump,
gear, motor, etc. in accordance with manufacturer’s
instructions. See Figure 3.
1. Parallel alignment: The use of a laser alignment tool or
dial indicator is preferred. If a laser alignment tool or dial
indicator is not available, use a straightedge. Turn both
shafts by hand, checking the reading through one
complete revolution. Maximum offset should be less
than .0005" (0.127 mm).
2. Angular alignment: Insert a feeler gauge between the
coupling halves. Check the spacing at 90° increments
around the coupling (four checkpoints). Maximum
variation should not exceed 0.005" (0.127 mm). Some
laser alignment tools will check angular alignment as
well.
3. Replace the coupling guards after setting alignment.
Figure 3 – Coupling Alignment
INTERNAL PUMP RELIEF VALVE AND
EXTERNAL BYPASS VALVE
NOTICE:
The pump internal relief valve is designed to protect
the pump from excessive pressure and must not be
used as a system pressure control valve.
For ALL liquefied gas applications, install an external bypass
valve, and any necessary piping, back to the storage tank.
DO NOT pipe the bypass valve back to the intake line.
The setting on the external bypass valve should be at least
25 PSI (1.7 bar) lower than the internal pump relief valve
setting. The valve and piping must be of adequate size to
accommodate the full flow from the pump when the discharge
line is closed.
The non-adjustable pump internal relief valve is factory set at
approximately 225 PSI (15.5 bar).
A Blackmer Model BV bypass valve can be mounted as
shown in Figure 4 for bulk plant installation. Refer to
Blackmer Bypass Valve Installation and Maintenance
Instructions for bypass valve settings and adjustments.
Figure 4. Bypass Valve Installation
CHECK VALVES
The use of check valves or foot valves in the supply tank is
not recommended with self-priming, positive displacement
pumps.
If the possibility of liquid backflow exists when the pump is off,
a check valve in the pump discharge piping is recommended
because the pump can motor in the reverse rotation and
create undue stress on all attached components. Never start
a pump when it is rotating in the reverse rotation as the
added starting torque can damage the pump and related
equipment.
PUMP ROTATION
When viewed from the driven end:
a right-hand pump (clockwise rotation) will have the
intake flange (2”, 8 bolts) on the right side.
a left -hand pump (counter-clockwise rotation) will have
the intake flange (2”, 8 bolts) on the left side.
NOTICE:
Confirm correct pump rotation by checking the pump
flow / rotation arrows respective to pump driver rotation.
TO REVERSE PUMP ROTATION
To reverse rotation, the pump must be disassembled then
reassembled with the shaft on the opposite side of the pump.
See the ‘Maintenance’ section for instructions.

501-K00 Page 5/12
INSTALLATION
GUIDE TO UNDERGROUND TANK
APPLICATIONS
PUMP
VAPOR
BV
TANK
3 "
15 %
MIN.
LEVEL
3
2
1
4
5
6
78
9
10
Fig. 5 – Underground Tank Schematic
No. Description LGL150 Series Pumps
1 Dip Tube 2"
2 Excess Flow Valve Fisher F190, Rego A2137A,
or equivalent
3 Control Valve - Full
Flow Ball 2"
4 Strainer (Optional) 2"
5 Inlet Piping 2"
6 Pump Speeds 1150, 1450, & 1750 RPM
7 Back Check Valve Fisher G200-16, Rego A7794
(sight glass) or equivalent
8 Control Valve - Full
Flow Ball 1.5"
9 Bypass Valve BV1.5"
10 Priming Valve Fisher F138* or equivalent
11 Minimum Tank Size 2,000 Gal (7570 liters)
* Blackmer PN: 455750
When pumping from an underground tank, the change in
elevation from the fluid level in the tank to the inlet of the
pump will cause significant vaporization of the fluid in the inlet
piping. For this reason alone, it is impossible to prevent
vaporization at the inlet of the pump for an underground tank
installation. However, there are many things that can be
done to minimize these effects. Refer to figure 5. See
Bulletin 500-002 “Underground Tank Application Guide” for
more detailed information.
For an underground tank installation, the piping between the
pump and the tank is filled with vapor when the pump is at
rest. This vapor must be removed before the pump can
prime. Reducing the amount of vapor during startup and
operation will greatly enhance the pump’s performance.
Inlet Piping Length
Keep the inlet piping as short as possible. Install the pump
directly over the tank and as close to the ground as possible.
Minimize the Number of Fittings
Every fitting, valve, and piece of straight piping causes a
pressure drop and adds to the startup vapor volume. Use a
minimum number of fittings on the inlet side of the pump.
Eliminate all possible elbows in the inlet piping by moving the
pump so that they will not be necessary. Size the inlet piping
per the table.
Strainers (4)
Suction strainers should not normally be used on
underground tank installations. The end of the dip tube
should be placed 2 – 3” (5 – 8 cm) above the bottom of the
tank. In applications with known high levels of contaminates,
install a strainer that is one or two sizes larger than the pump.
Vapor Priming Valve (10)
Install a vapor priming (excess flow) valve on the discharge
side of the pump, between the soft seat back check valve and
the pump. Refer to figures 5 and 6. The vapor excess flow
valve provides a path to return the vapors to the tank during
startup. When liquid flow is established, the vapor excess
flow valve will close. When piping the return line from the
vapor excess flow valve to the tank, ensure that there are no
low spots where liquid can collect. Pipe the vapor return line
to the vapor space in the tank, NOT to the liquid space of the
tank or to the inlet of the pump.
Soft Seat Back Check Valve (7)
Install a soft seat back check valve on the discharge side of
the pump as close as possible. A swing valve is preferred.
Refer to figure 6.
BACKCHECK
V
ALVE
P
U
MP
VAPOR PRIMING VALVE
BACK TO VAPOR SPACE OF TANK.
SLOPE HORIZONTAL PIPING
DOWNWARD TOWARD TANK.
Fig. 6 – Vapor Priming Valve and Back Check Valve

501-K00 Page 6/12
OPERATION
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard
in place
Failure to relieve system pressure prior
to performing pump service can cause
serious personal injury or property
damage. Systems with meters will still
be pressurized even after the hose is
emptied
Hazardous pressure
can cause serious
personal injury or
property damage
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury or property damage.
Hazardous pressure
can cause serious
personal injury or
property damage
Pumps operating against a closed valve
can cause system failure, personal
injury and property damage
Hazardous pressure
can cause personal
injury or property
damage
PRE-START UP CHECK LIST
1. Inspect complete piping system and supports to ensure
that no piping loads are being placed on the pump.
2. Verify proper coupling alignment.
3. Install pressure gauges in the 1/4" NPT intake and
discharge ports located on the pump casing to check
pump performance after start-up.
4. Ensure all valves and fittings in piping system are in the
start-up or operating positions.
5. Jog the pump motor to verify proper pump rotation. If
rotation is incorrect, reverse rotation of motor.
START UP PROCEDURES
NOTICE
Consult the "Troubleshooting" section of this manual if
difficulties during start up are experienced.
1. Start the motor. Priming should occur within one minute.
2. Check the pressure gauges to ensure the system is
operating within expected parameters. Record the
gauge readings in the "Initial Start Up Information"
section of this manual for future reference.
3. Inspect piping, fittings, and associated system equipment
for leaks, noise, vibration and overheating.
4. Check the flow rate to ensure the pump is operating
within the expected parameters. Record flow rate in the
“Initial Start Up” section of this manual.
5. Close the discharge valve and check the differential
pressure across the pump. It should not exceed the
pressure setting of the external bypass valve.
6. With the discharge valve still closed, momentarily close
the manual shut-off valve in the bypass return line to
check the pump relief valve. The pressure should be at
least 25 PSI (1.7 bar) higher than the maximum system
operating pressure or the system pressure control valve
setting.
7. The external bypass valve must always be set at least 25
PSI (1.7 bar) lower than the internal pump relief valve.
NOTE - The normal operating pressure should be at
least 5 - 15 PSI (0.3 -1.0 bar) less than the external
bypass setting. Pump speeds which result in higher
pressures (nearing the valve setting) forces the liquid to
be recirculated, creating excessive wear on the pump
and equipment.

501-K00 Page 7/12
MAINTENANCE
Failure to disconnect and lockout
electrical power or engine drive before
attempting maintenance can cause
severe personal injury or death
Hazardous
machinery can
cause serious
personal injury.
Disconnecting fluid or pressure
containment components during pump
operation can cause serious personal
injury or property damage.
Hazardous pressure
can cause serious
personal injury or
property damage
If pumping hazardous or toxic fluids,
system must be flushed and
decontaminated, inside and out, prior to
performing service or maintenance
Hazardous or toxic
fluids can cause
serious injury.
Failure to disconnect and lockout
electrical power before attempting
maintenance can cause shock, burns or
death
Hazardous voltage.
Can shock, burn or
cause death.
Failure to relieve system pressure prior
to performing pump service can cause
serious personal injury or property
damage. Systems with meters will still
be pressurized even after the hose is
emptied
Hazardous pressure
can cause serious
personal injury or
property damage
NOTICE:
Maintenance shall be performed by qualified technicians
only, following the appropriate procedures and warnings
as presented in this manual.
Torque Table 1
Head / Casing Capscrews (21) Ft-lbs 30
N-m 40.7
Relief Valve Cover Capscrews Ft-lbs 20
N-m 27
Bearing Cap Capcrews (28) Ft-lbs 20
N-m 27
STRAINERS
Strainers must be cleaned regularly to avoid pump starvation.
Schedule will depend upon the application and conditions.
LUBRICATION
NOTICE:
To avoid possible entanglement in moving parts do not
lubricate pump bearings, hydraulic adapter coupling or
any other parts while pump is running
NOTICE:
If pumps are repainted in the field, ensure that the grease
relief fittings (76A) are functioning properly after painting.
Do NOT paint them closed. Remove any excess paint
from the fittings.
Pump bearings and hydraulic motor couplings (if equipped)
must be lubricated every three months at a minimum. More
frequent lubrication may be required, depending on the
application and the operating conditions.
Recommended Grease:
Mobil® - Mobilgrease XHP222,
Exxon® - Ronnex MP Grease
or equivalent Lithium grease.
Greasing Procedure:
1. Remove the grease relief fittings (76A) from the bearing
covers (27) or hydraulic motor adapter (135).
2. SLOWLY apply grease with a hand gun until grease
begins to escape from the grease relief fitting port. Discard
excess grease in accordance with the proper codes and
regulations.
3. Replace the grease relief fittings (76A).
DO NOT over grease pump bearings. While it is normal for
some grease to escape from the grease tell-tale hole after
lubrication, excessive grease can cause mechanical seal
failure. The tell-tale hole is located in the head (20) between
the bearing (24) and the mechanical seal (153).

501-K00 Page 8/12
MAINTENANCE
VANE REPLACEMENT
NOTICE:
Maintenance shall be performed by qualified technicians
only, following the appropriate procedures and warnings
as presented in this manual.
1. Drain and relieve pressure from the pump and system as
required.
2. Remove the head assembly from the outboard (non-
driven) side of the pump according to steps 1 through 6
in the "Pump Disassembly" section of this manual.
3. Turn the shaft by hand until a vane (14) comes to the
bottom (6 o'clock) position of the rotor. Remove the
vane.
4. Install a new vane (14), ensuring that the rounded edge
is DOWN, and the relief grooves are facing towards the
discharge port. See Figure 7.
5. Repeat steps 3 and 4 until all vanes have been replaced.
6. Reassemble the pump according to the "Pump
Assembly." section of this manual.
Figure 7. Vane Installation
PUMP DISASSEMBLY
NOTICE:
Follow all hazard warnings and instructions provided in
the “Pump Maintenance” section of this manual.
1. Drain and relieve pressure from the pump and system as
required.
2. Remove the outboard head capscrews (21) and slide the
outboard head (23) off the shaft. The bearing (24),
grease seal (104A), mechanical seal stationary seat and
stationary O-ring (153A & 153D) will come off with the
head assembly.
3. To disassemble the outboard head:
a. Remove the bearing cover capscrews (28), bearing
cover (27A) and shims (26) from the outboard head.
b. Evenly tap bearing outer race with a soft-faced drift
punch to remove the mechanical seal stationary seat
(153A), grease seal (104A), and bearing outer race.
4. Carefully pull the rotating seal assembly, consisting of
seal jacket (153C), rotating seal face and rotating O-ring
(153B & 153E) from the shaft. Remove and discard the
rotating O-ring (153E).
5. Carefully remove the disc (71).
6. If present, remove seal spacer ring (159) from shaft.
7. Clean inboard end of pump shaft thoroughly, making
sure the shaft is free of nicks and burrs. This will prevent
damage to the mechanical seal and grease seals when
the rotor and shaft assembly is removed.
8. Pull the rotor and shaft assembly (13) from the casing
(12). While one hand is pulling the shaft, the other hand
should be cupped underneath the rotor to prevent the
vanes (14) from falling out.
9. Remove vanes (14) and inboard spacer ring (159, if
present) and inboard rotating mechanical seal parts from
rotor and shaft assembly.
10. Remove the head capscrews (21) and inboard head (20)
from casing (12). The bearing (24), grease seal (104A),
mechanical seal stationary seat and stationary O-ring
(153A & 153D) will come off with the head assembly.
11. To remove the mechanical seal stationary seat (153A),
grease seal (104A), bearing outer race, and bearing
spring, evenly tap bearing outer race with a soft-faced
drift punch.
12. Carefully remove the disc (71).
13. If necessary, remove the liner (41) by tapping around the
outside diameter of the liner with a hard wood block and
a hammer until it is driven from the casing (12).
14. Remove liner key (74).
PARTS REPLACEMENT
1. Any O-rings removed or disturbed during disassembly
must be replaced with new O-rings.
2. Excessive or continuous leakage from the tell-tale hole in
the bearing cover may be an indication of a damaged
mechanical seal. If a mechanical seal has been leaking, it
is recommended the entire seal be replaced. Refer to
"Troubleshooting" for possible causes of seal leakage.

501-K00 Page 9/12
MAINTENANCE
PUMP ASSEMBLY
Before reassembling the pump, inspect all component parts
for wear or damage, and replace as required. Wash out the
bearing/seal recess of the head and remove any burrs or
nicks from the rotor and shaft. Remove any burrs from the
liner.
1. Install liner key (74) in casing (12).
2. Align the liner (41) keyway with the key (74) in the pump
casing (12) and start the liner into the casing. The word
“INTAKE” cast on the liner must face the intake port of
the pump casing.
3. Uniformly tap the outer edge of the liner with a rubber
mallet to fully insert into the casing.
4. Reassemble the INBOARD (driven) side of the pump
first.
For a right-hand (clockwise) rotation pump, position the
pump case with the intake flange (2”, 8 bolts) to the right.
For a left-hand (counterclockwise) rotation pump,
position the pump case with the intake flange (2”, 8 bolts)
to the left.
5. Place the inboard disc (71) against the liner (41) on the
inboard side of pump with the seal cavity outward and
disc relief hole located as shown in Figure 8.
Figure 8. Disc Installation
6. Apply a light coat of grease to the grease seal journal in
the inboard head (20).
7. Install new small grease seal (104) into inboard head
(20). Flat side of grease seal must face outside of head,
with spring and lip side facing inside of head.
8. Install bearing spring (24C) in inboard head (20).
9. Install outer race of bearing (24) into bearing pocket in
inboard head (20).
10. Install grease seal (104A) into bearing pocket of head
with open side toward bearing and flat side facing
outward. Gently push or tap the grease seal until flat
face of grease seal is about 1/8” (4 mm) past the larger
diameter flat face in head. Refer to Figure 9.
Figure 9. Grease Seal Installation
Figure 10. Stationary Seat Installation
11. Place new stationary seat O-ring (153D) in groove of
stationary seat (153A).
12. Lubricate the stationary seat journal in the inboard head
(20) with a light coating of grease.
13. Align stationary seat (153A) into inboard head (20) with
raised face outward and location pin on opposite side
aligned with the anti-rotation slot in the head. Refer to
Figure 10.
14. Gently push stationary seat into head. Be careful not to
nick the raised face on the stationary seat. Clean the
polished face with a clean tissue and alcohol.
15. Without installing the head O-ring (72) or rotating
mechanical seal components, temporarily attach the
inboard head (20) to the casing (12). Install and hand-
tighten two head capscrews (21), 180 degrees apart.
16. Grease the inboard end of the shaft of the rotor and shaft
assembly (13).
17. Gently slide rotor and shaft assembly (13) into the casing
(12) and through the grease seals (104 & 104A) and
bearing (24) in the inboard head (20).

501-K00 Page 10/12
MAINTENANCE
18. Turn the shaft by hand until a vane slot is at the bottom
(6 o'clock) position of the rotor.
19. Install a new vane (14), ensuring that the rounded edge
is DOWN, and the relief grooves are facing towards the
discharge port. See Figure 7. Repeat for all eight vanes.
20. Install disc (71) on the outboard side of the pump with
the seal cavity facing outward and the disc relief hole
towards the inlet side. Refer to Figure 8.
21. If used, install seal spacer ring (159) on shaft with
outward tangs of spacer ring engaged with drive holes in
rotor.
22. Slide the seal jacket assembly (153C) over the shaft and
into the disc cavity with the drive tangs of the jacket
towards the rotor. Rotate the jacket assembly to engage
the drive tangs in the rotor slots.
23. Apply a small amount of grease to the shaft and the inner
ring of the bearing (24).
24. Install a new rotating O-ring (153E) in the rotating seal
face (153B). With the raised face outward, gently push
the seal face and O-ring over the bearing inner race and
onto the shaft.
25. Align the notches of the seal face (153B) with the tangs
on the seal jacket assembly (153C). Clean the polished
face with a clean tissue and alcohol.
26. Install outer race of bearing (24), grease seal (104A) and
stationary seat (153A) into outboard head according to
steps 8 and 10 above.
27. Install new head O-ring (72) into O-ring groove in
outboard head (23).
28. Apply a small amount of grease to the shaft and the inner
ring of the bearing (24).
29. Carefully install the outboard head assembly (23) over
the shaft. Do not contact the end of the shaft with the
polished face of the stationary seat. Center the head on
the pump casing (12). Install and uniformly tighten all six
head capscrews (21) and torque per Torque Table 1.
30. Turn the pump casing around and remove the inboard
head (20) previously installed.
31. If used, install the seal spacer (159), mechanical seal
(153), O ring (72), and inboard head (20) as instructed in
steps 21 through 29.
32. Install bearing cap (27) in outboard head (23) without
capscrews. Press bearing cap into head by hand.
Measure gap between bearing cap (27) and outboard
head surface. Refer to Figure 11.
Figure 11. Bearing Cap Installation
33. Remove bearing cap and install shims (26) with total
thickness equal to measurement of gap between bearing
cap and head. Reinstall bearing cap, and torque the
capscrews (28) per Torque Table 1.
34. Rotate the shaft by hand to test for binding. If the rotor
does not turn freely, remove bearing cap (27) and install
another 0.005” shim between bearing cap and head.
Check for free rotation of rotor and shaft. Repeat this
procedure, adding more shims until rotor spins freely.
35. If a motor adaptor is being used, mount with the four
mounting bolts (28A) to the head of the pump. Ensure
that the adaptor support ribs are in the 12:00 and 6:00
position with respect to the ground.
36. RELIEF VALVE ASSEMBLY
a. Insert the valve (9) into the relief valve bore of the
casing with the fluted end inward.
b. Install the relief valve spring (8) against the valve.
c. Attach a new relief valve O-ring (10) and the valve
cover (4) on the casing. Torque the capscrews (28)
per Torque Table 1.
37. Reinstall coupling, shaft key, and coupling guards.
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard
in place
38. Refer to “Pre-Start Up Check List” and “Start Up
Procedures” sections of this manual prior to restarting
pump operation.