FlowMaster Rotary Driven Hydraulic Pump
Page Number - 4
7.5A-18110-G00
Form 403142
3. Remove six self-threading Screws (29) and remove the
Housing Cover (30) and the Cover Gasket (31).
4. Remove Retaining Ring (51) and pull the Shovel Plug
(50) from the Housing Tube (49).
5. Remove two Socket Head Screws (38) and separate the
Hydraulic Motor (36) from the Pump Housing (40).
6. Remove two Outlet Pin Nuts (44) from the Pump Housing
(40).
7. Remove the Pump Subassembly (1 through 28) from
the Pump Housing (40). Pushing the subassembly up
with a wooden or plastic rod 3/4 O.D. against the Check
Seat Housing (28) is helpful.
8. Remove the Housing Tube (49) from the Pump Housing
(40) by inserting a 3/8 rod through the inlet holes at the
bottom of the Housing Tube (49) and unscrewing it.
9. Remove the Bronze Bearing (45), the O-Ring (46), and
the Backup Washer (47) from the Housing Tube (49).
10. Remove the Crankrod Assembly (1 through 8) from the
pump by unscrewing the Button Head Screws (12) and
then pulling out the Wrist Pin Bushings (13).
11. Remove the Check Seat Housing (28) from the
Reciprocating Tube (21). There is a 3/8 Allen Head
socket in the throat of the Check Seat Housing (28) to
facilitate removal.
12. Unscrew the Wrist Pin Anchor (14) from the
Reciprocating Tube (21) and pull the Plunger Assembly
(9 through 20) from the tube.
13. Using a 1/2 dia. wooden or plastic rod, push the Cup
Seal (22) and the Pump Cylinder (24) from the
Reciprocating Tube (21).
14. Remove the Pump Plunger (20) from the Plunger Link
Rod (17). A spanner wrench, which uses the holes in
the Pump Plunger, is required.
15. Unscrew the Plunger Link Rod (17) from the Plunger
Tube (11) and slide off the Cup Seal (16), the Backup
Washer (15) and the Wrist Pin Anchor (14).
16. Unscrew the Plunger Tube (11) from the Outlet Pin (9).
17. To dismantle the Crankrod Assembly (1 through 8),
remove Flat Head Screws (1) and the Counter
Weights (2)©.
18. Remove the Retaining Rings (6) and press the Ball
Bearing Assembly (6, 7, 8) out of the Crank Rod (5). Be
sure to press the Ball Bearing (8) on the outer race.
Pump Assembly Procedure
1. When the pump is dissembled, it is recommended to
replace all seals and gaskets, which are included in the
repair kit.
2. In the process of disassembly, examine the following
components and replace if excessive wear is indicated:
Ball Bearing (8), Crank Eccentric (7), Crankrod (5), Wrist
Pin Bushings (13), Plunger Tube (11), Pump Plunger and
Upper Check Parts (20, 19 and 18), Pump Cylinder (24),
Check Seat Housing and Lower Check Ball and seat (28
and 26), upper Bronze Bushing (45), Housing Tube (49),
Shovel Plug (50), and Reciprocating Tube (21).
3. Assembly Procedure is the reverse of the Disassembly
Procedure except for the following:
Disassembly Procedure (See illustration #1)
Tools Required:
- Hex Bit Socket Wrenches (3/8 square drive) with 3/8 hex,
5/32 hex, 1/4 hex.
- 3/8 O.D. Steel Rod, 8 long
- 12 Crescent Wrench
- Spanner Wrench (for 3/8 diameter tube, 1/8 pin)
- 1/2 to 3/8 square drive adapter
- Torque wrench (1/2 square drive, 0 - 50 ft-lb capacity)
- Torque wrench (3/8 square drive, 0 - 120 in-lb capacity)
- 1/4 nut driver
- Screwdriver (flat blade, 1/8 blade width)
1. Remove the four Socket Head Screws (32) and separate
Connection Manifold (33) from the Hydraulic Motor (36).
2. Remove Pipe Plug (39) and drain the crankcase oil from
the Pump Housing (40).
Do not exceed 450 PSIG (32 bar) working hydraulic pressure.
Use high pressure components to reduce risk of serious in-
jury including fluid injection and splashing in the eyes or on
the skin. All accessories connected to the pump outlet must
have a working pressure rating of at least 5,000 PSIG (345
bar).
Operation
Connect one port of the pump to a hydraulic power supply
and the other to the tank line. The pump motor will run in
either direction, so it makes no difference which port
connects to the power supply.
1. Slowly turn on the hydraulic flow until the pump begins to
run.
2. Prime the pump by slowly operating the pump until
lubricant begins to flow. Make sure that all air has been
expelled from the pump and even lubricant flow is achieved.
3. Adjust the pump pressure to the desired application
requirements. Do not exceed pump operating pressure of
450 PSIG (32 bar).
4. Always use the lowest pump output pressure to obtain the
desired results. This will reduce the pump wear.
Do not exceed maximum operating temperture of the hydrau-
lic fluid (200° F (93° C)). Recommended minimum hydraulic
fluid viscosity is 50 SUS. Never allow the pump to run dry of
lubricant. A dry pump quickly speeds up,creating friction heat,
which can damage the seals. Monitor the supply lubricant
level and refill when necessary.
Maintenance & Repair
Relieve pressure from the pump and supply lines before
serviceing or repairing the pump, to reduce the risk of an
injury from injection, splashing fluid or moving parts.
Always use Lincoln Industrial parts for service and repair.
© indicates change.
