Maintenance
Hydraulic System
148
9821/6100-4
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There must be sufficient pressure stored in the accumulator to lower the boom to the ground in two stages. If
this is not possible, contact your JCB dealer.
Check (Leaks)
Notice:
If the fluid is cloudy, then water or air has contaminated the system. This could damage the hydraulic
pump. Contact your JCB dealer immediately.
1. Make the machine safe.
2. Open the access covers.
3. Check the hydraulic hoses for damage.
4. Close the access covers.
5. If necessary, contact your JCB dealer.
Services
Check (Operation)
Check the operation of all the hydraulic services. Check for:
•
Speed of operation
•
Strength of operation
•
Juddering
•
Abnormal noises.
Do not use the machine if one or more of these faults are found. You must make sure that the hydraulic service
is repaired immediately.
Oil
Check (Level)
1. Make the machine safe with the boom lowered.
Refer to: Maintenance Position (Excavator Arm Lowered) (Page 122).
2. Get access to the hydraulic oil level indicator and hydraulic oil filler cap.
Refer to: Service Points (Page 123).
3. Check the hydraulic oil level indicator. The hydraulic oil level must be visible in the level indicator.
4. Top up oil level if necessary:
4.1. Remove the hydraulic oil filler cap.
4.2. Add hydraulic oil.
Refer to: Fluids, Lubricants and Capacities (Page 173).
4.3. Install the filler cap.
Cylinder Rams
Check (Condition)
Extend each ram fully, one at a time and visually examine for score marks, dents, leaks or similar defects.
Make the machine safe before inspecting each ram.
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