PUMP GP-GEAR 4452672 - Caterpillar

Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.
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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns.To prevent possible personal injury, release the pressure in the work tool hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch.
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release" in this manual.
Illustration 1 g00622196
Fasten a suitable lifting device to the rod end of the bucket cylinder. Put a wood block (3) under the link assemblies as a support.
Remove the two nuts and retaining bolt (1) .
Illustration 2 g00564329
Put a wood block under the bucket cylinder. Use Tool (A) to remove pin (2) . The weight of the pin is 40 kg (90 lb).
Illustration 3 g00622206
Raise bucket cylinder (4) until the bucket cylinder is level. Fasten a lifting sling and a hoist to the head end of the bucket cylinder, as shown. Disconnect two hoses (7) from the bucket cylinder. A small amount of oil will drain from the hoses when the hoses are disconnected from the bucket cylinder. Drain the oil into a suitable container for disposal. Put plugs into the ends of the disconnected hoses in order to prevent oil loss and keep contaminants out of the hydraulic system.
Remove retaining bolt (5) , the washer, pin assembly (6) and the spacer. Remove the bucket cylinder. The weight of the bucket cylinder is 500 kg (1100 lb).Note: The machine may be equipped with shims between the stick and the bucket cylinder at the pin joint. Place identification marks on the shims in order to show the location of the shims for assembly purposes.
Remove the shims (if equipped) at the stick pin joint for the bucket cylinder.