PUMP GP-PISTON 1863331 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Illustration 1 g00743084
Remove four bolts (1) with the nuts. Remove cap (3) with the shims from the cylinder rod.
Move the cylinder rod into the lift cylinder and away from bulldozer blade trunnion (2).
Place cap (3) with the shims on the cylinder rod. Loosely install the four bolts with the nuts.
Illustration 2 g00627346
Remove cover (9) from the quick-drop valve.
Disconnect hoses (5) at the quick-drop valve.
Disconnect wire harness (8).
Illustration 3 g00584779
Install tool (A) on lift cylinder (4). Fasten a nylon strap to tool (A) and attach a hoist to the nylon strap. The weight of lift cylinder (4) is approximately 200 kg (440 lb).
Remove bolts (6) that hold caps (7) to the yoke. Remove caps (7).
Remove the lift cylinder (4) from the machine. Installation Procedure
Table 2
Required Tools
Tool Part Number Description Qty
A 138-7573 Link Bracket 2
B 1P-0510 Driver Group 1
Illustration 4 g00627418
If bearing (10) in cap (8) needs to be replaced, weld a bead of material around the inside diameter of the bearing. Remove bearing (10) from cap (8).
Use tool (B) and a press to install the bearing in cap (8). The inner diameter of the bearing should be 63.32 0.08 mm (2.493 0.003 inch).
Pack cap (8) with 5P-0960 Molybdenum Grease. Install caps in position on the lift cylinder trunnions.
Illustration 5 g00584779Note: The lift cylinder (4) weighs 200 kg (440 lb).
Attach tool (A) on lift cylinder (4). Attach a hoist.
Illustration 6 g00584782
Position the lift cylinder on yoke (9). Install two caps (8) and install four bolts (7) that hold the lift cylinder to the yoke. Tighten the bolts to a torque of 430 60 N m (315 45 lb ft).
Illustration 7 g00613170
Remove the cap with the shims from the cylinder rod. Position the cylinder rod for installation on the bulldozer blade trunnion (2).
Install cap (3) with the shims on the cylinder rod. Install four bolts (1) with the nuts. Tighten the nuts to a torque of 430 60 N m (315 45 lb ft).
Illustration 8 g00677458
Connect two hoses (5) to quick-drop valve (6). Tighten the eight bolts that fasten the half flanges to a torque of 50 10 N m (37 7 lb ft).
Remove the hoist and remove tool (A).
Operate the lift cylinders for several cycles in order to purge air from the system. Fill the hydraulic tank. Reference: Refer to the Operation and Maintenance