BEARING 1538439 - Caterpillar

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 implement 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 hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release" in this manual.
Drain the oil from the hydraulic oil tank into a suitable container for storage or disposal. The capacity of the hydraulic oil tank is 105 L (27.7 US gal) .
Illustration 1 g00367222
Typical example
Remove two bolts (1) and the washers. Remove plate (2) .
Put identification marks on all of the hose assemblies that are connected to the main control valve. Identification marks are for installation purposes.Note: Put plugs in the ends of all hose assemblies that are disconnected. Plugs prevent oil loss. Plugs prevent contaminating the hydraulic system.
Illustration 2 g00374843
Remove eleven hydraulic hoses (3) from the top of the main control valve.Note: Not all of the hoses need to be disconnected in order to remove the main control valve. Some of the hoses are routed from one location to another location on the main control valve.
Illustration 3 g00374846
Remove four hydraulic hoses (4) from the center valve bank.
Put an identification mark on hose (5) that is connected to the swing motor for installation purposes. Remove hydraulic hose (5) from the swing motor.
Illustration 4 g00374848
Remove seven hydraulic hoses (6) from the right valve bank.
Illustration 5 g00374898
Remove six hydraulic hoses (7) from the left valve bank.
Illustration 6 g00374899
Disconnect three electrical connectors (8) .
Illustration 7 g00379852
Remove four bolts (9) and remove panel (10) .
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Remove four bolts (11) and move the check valve (12) away from the main control valve.
Illustration 9 g00374909
Remove two hydraulic hoses (13) from the back of the main control valve.
Illustration 10 g00374996
Attach an appropriate lifting device in order to support the main control valve. The weight of the main control valve is approximately 136 kg (300 lb) .
Remove four bolts (14) and the washers that hold the main control valve in position.
Carefully raise the main control valve approximately 30 cm (12 inch) .
Illustration 11 g00496085
Remove the remaining hydraulic hoses (15) from the bottom of the main control valve. Carefully inspect the main control valve for any hydraulic hoses or wiring harnesses that must be disconnected prior to removal.
Remove the main control valve from the machine. The weight of the main control valve is approximately 136 kg (300 lb) .