Removal And Replacement - jcb JS300 Service Manual

Removal
1 Jack up the machine by pressing the boom/dipper on
the ground. Install wooden blocks under the tracks.
K Fig 2. ( T
E-172).
Fig 2.
2 Stop the engine and release hydraulic system
pressure (see Section3, Releasing Hydraulic
Pressure).
plates.K Fig 3. ( T E-172)
3 Remove the belly
Fig 3.
E-172

Removal and Replacement

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
Do not go underneath the machine with the engine
running. Switch off the engine, apply the park brake
and block both sides of all wheels before going
JS10510
underneath the machine.
TRANS-2-1
4
5
JS10520
9803/5100-1
Section E - Hydraulics
Removal and Replacement
!M
WARNING
Hydraulic Pressure
!M
WARNING
Attach identification tags to the rotary coupling hoses
for reconnection purposes. Remove the hoses and
install blind plugs and caps to prevent contamination.
Remove the three screws/washers A and lift off
locking bar B.
Rotary Coupling
E-172