jcb JS300 Service Manual page 855

Typical Dipper Ram
Removal
!M
WARNING
Hydraulic Pressure
Hydraulic fluid at system pressure can injure you.
Before connecting or removing any hydraulic hose,
residual hydraulic pressure trapped in the service
hose line must be vented. Make sure the hose service
line has been vented before connecting or removing
hoses. Make sure the engine cannot be started while
the hoses are open.
INT-3-1-11_2
!M
WARNING
Lifting Equipment
You can be injured if you use faulty lifting equipment.
Make sure that lifting equipment is in good condition.
Make sure that lifting tackle complies with all local
regulations and is suitable for the job. Make sure that
lifting equipment is strong enough for the job.
INT-1-3-7
1 Lower the attachment to the ground, as shown.
Fig 31.
2 Place a wooden block under the dipper ram.
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P11-E003_1
3 Stop the engine, remove the key.
Release the tank pressure, see Releasing the Tank
Pressure
709670 4 Remove the nuts and bolts from the rod end of the
ram.
9813/5100-1
Section E - Hydraulics
Hydraulic Rams
Removal and Replacement
Fig 32.
Fig 33.
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709600
E-194