Maintenance
Hydraulic System
Check (Condition)
Hydraulic Hoses
WARNING Damaged hoses can cause fatal accidents. Examine the hoses regularly. Do not use the machine
if a hose or hose fixture is damaged.
Examine the hoses for:
• Damaged hose ends
• Worn outer covers
• Ballooned outer covers
• Kinked or crushed hoses
• Embedded armouring in the outer covers
• Displaced hose end fittings.
Replace a damaged hose before you use the machine again.
The replacement hoses must be of the same size and standard. If necessary, for more information contact
your JCB dealer.
Accumulator
1. Stop the machine on solid, level ground.
2. Raise the boom and extend the dipper.
Refer to: Operating Levers/Pedals (Page 53).
3. Stop the motor. Do not raise the controls isolation lever.
Refer to: Safety Equipment (Page 43).
4. Lower the boom. Stop the boom several metres from the ground.
5. Lower the boom to the ground.
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
139 9831/8250-4 139
JCB © Admin Pimteam - 23/06/2021 05:32.
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