Usage:
NOTE: The following procedure is for the removal and the installation of the hydraulic oil filter group. For complete details regarding servicing of the hydraulic oil filter group, refer to the "Operation & Maintenance Manual".
Fluid Spillage Containment
Care must be taken to ensure that the fluids are contained during performance of the inspection, the maintenance, the testing, the adjusting and the repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to the "Tools And Shop Products Guide, NENG2500" the tools and the supplies suitable to collect and contain any of the fluids in Caterpillar machines. Dispose of the fluids according to local regulations and mandates.
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At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the hydraulic system before any of the hydraulic lines or any of the components are disconnected or removed. |
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1. Release the pressure in all of the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed, as follows:
a. Fully retract the stick cylinder rod.
b. Adjust the position of the bucket so that it will be flat on the ground when the boom is lowered.
c. Lower the boom until the bucket is flat on the ground.
d. Shut off the engine and place key in the "ON" position. Put the hydraulic activation control lever in the "UNLOCK" position.
e. Move the control levers for the boom, the stick and the swing to all full stroke positions. This will release any pressure that might be present in the pilot system.
f. Return the key to "OFF" position.
g. Slowly loosen the fill plug on the hydraulic tank and release the pressure.
h. Tighten the fill plug on the hydraulic tank. Tighten the fill plug to a torque of 68 ± 7 N*m (50 ± 5 lb ft).
i. The pressure in the hydraulic system has been released and the hydraulic lines and the components can be removed.
2. Drain the hydraulic oil tank in a suitable container for storage or disposal. The capacity of the hydraulic oil tank is 130 liters (34 U.S. gal).
3. Open left access panel door.
4. Remove two bolts (2) and the washers.
5. Oil will drain from the hose assembly connections at the hydraulic oil filter group. Place a suitable drain pan under the hydraulic oil filter group to collect drain oil.
6. Remove the manifold oil filter and base (3) from the hydraulic oil filter group (1).
7. Disconnect electrical connector (4).
8. Remove four bolts (5) to disconnect hydraulic hose (6).
9. Remove O-ring (7).
10. Remove four bolts (8) to disconnect hydraulic oil filter group (1) from hydraulic oil tank (9).
11. Remove four bolts (10) and the washers from cover (11). Remove cover (11).
12. Attach Tool (A) to hydraulic oil filter group (1). The weight of the hydraulic oil filter group is 22 kg (48 lb).
13. Support hydraulic oil filter group (1) with a hoist while removing two mounting bolts (12) and the washers.
14. Carefully lower hydraulic oil filter group (1) down and out of the machine. The weight of the hydraulic oil filter group is 22 kg (48 lb).
NOTE: The following steps are for the installation of the hydraulic oil filter group.
15. Attach Tool (A) to hydraulic oil filter group (1). The weight of the hydraulic oil filter group is 22 kg (48 lb).
16. Support hydraulic oil filter group (1) with hoist while installing two mounting bolts (12) and the washers.
17. Position cover (11), and install four bolts (10) and the washers.
18. Position hydraulic oil filter group (1) to hydraulic oil tank (9).
19. Install four bolts (8).
20. Install O-ring (7).
21. Position hydraulic hose (6) and four bolts (5).
22. Connect electrical connector (4).
23. Position hydraulic oil filter group (1), and install two bolts (2) and the washers.
NOTE: Refer to the topic "Lubricant Viscosities and Refill Capacities" in the "Operation & Maintenance Manual" for the proper filling procedure and the proper levels for the hydraulic system.
24. Fill the hydraulic oil tank with oil to the correct level.
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When the main hydraulic pump has been serviced or the hydraulic oil has been replaced, the air in the hydraulic system must be removed. No attempt should be made to start the engine until the main hydraulic pump has been filled with oil, or serious damage can be caused to the hydraulic components. To release the pressure from the main hydraulic pump, refer to the topic "Release Of Air From Main Pumps" in the appropriate "320B, 320B L and 320B N Hydraulic Excavators, Hydraulic Systems Testing & Adjusting Manual". |