jcb JS300 Service Manual page 860

Typical Triple Articulated Boom (TAB)
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 incorrect or faulty lifting
equipment. You must identify the weight of the item to
be lifted then choose lifting equipment that is strong
enough and suitable for the job. Make sure that lifting
equipment is in good condition and complies with all
local regulations.
INT-1-3-7_2
1 Park the machine on level ground and, with the
bucket and dipper rams fully retracted and the TAB
ram partially extended, lower the attachment to the
ground.
Fig 46.
Stop the engine and remove the key.
2 Attach suitable lifting gear to the TAB ram and just
take up the slack.
E-199
P11-E004
3 Release the tank pressure, see Releasing the Tank
Pressure.
4 Remove the pivot pin retaining nuts and bolt from the
rod end of the ram.
9813/5100-1
Section E - Hydraulics
Hydraulic Rams
Removal and Replacement
Fig 47.
Fig 48.
JS07250-C1
Fig 49.
JS07240-C1
E-199