jcb JS300 Service Manual page 845

a If parts other than genuine JCB parts are used,
the desired results may not be obtained. Use only
genuine JCB parts.
3 Caution during dismantling and reassembly.
a Dismantling the ram while it is still installed on the
machine can be dangerous as unexpected
movements of the machine can occur. Remove
the ram from the machine and then dismantle.
b If reassembled with dirty hands, foreign matter
can enter the ram causing a shorter life span and
also the other hydraulic equipment may be
damaged. Reassemble in a clean state.
c Follow the instructions in the diagrams regarding
torque tightening for screwed parts. If the torque is
too high or too low, it can cause damage.
E-184 9813/5100-1
Section E - Hydraulics
Hydraulic Rams
Precautions During Use
E-184