ROD 1564503 - 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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Illustration 1 g00771809
Pump compartment (1) Connector (2) O-Ring seal (3) Case drain hose (4) Negative flow control hose
While the engine is stopped, disconnect hose (3) from connector (1) .
Remove connector (1) and O-Ring seal (2) from the pump housing.
Fill the main pumps with oil.
Inspect O-Ring seal (2). If the seal is damaged, replace the seal.
Install O-Ring seal (2) and connector (1) at the pump housing.
Connect hose (3) to connector (1). Tighten hose (3) to the specified torque.
To avoid system damage, make sure that the hydraulic pump is properly filled with hydraulic oil before start-up.
Start the engine.
Place the engine at low idle position. Raise the boom and hold the boom in this position.
Slowly loosen hose (4) until oil begins to flow around the hose connection.
Tighten hose (4) to the specified torque.
Stop the engine and slowly lower the boom until the bucket is on the ground. This pressurizes the hydraulic tank.
Illustration 2 g00771829
(5) Air Vent Plug
Slowly loosen air vent plug (5) until oil begins to flow from the opening.
Tighten the air vent plug to the specified torque.