jcb JS300 Service Manual page 869

Assembly of Piston Seals
Before Assembly
1 Ensure that piton surface is clean and free from
damage. Ensure that slipper seal insertion tool is free
from defects. Burrs or marks may damage the seals
and cause leakage. Check the outside of the tool
carefully.
2 Fit the back up ring B into it seat on the inside of the
piston. Instal the o-ring A using the same method as
the backup ring.
Make sure the O-ring is not twisted after assembly.
Fig 77.
3 Fit the slipper back up ring by inserting it in one side
of its seat and stretching it to the other side by using
a screwdriver. ensure it sits in its seat and is not
K Fig 78. ( T E-208)
twisted
E-208
4
A
B
C030780-C1
5
9813/5100-1
Section E - Hydraulics
Dismantling and Assembly
Fig 78.
K Fig 79. ( T
Fit the first back up ring
Fig 79.
Carefully locate the slipper seal insertion jig onto the
K Fig 80. ( T
piston E-208).
Fig 80.
Hydraulic Rams
C030910
E-208).
C030920
C030930
E-208