b. Disconnect the head side hose (A) and drain oil from
the piping. Insert a plug (2) into the hose just discon-
nected.
c.
Operate the bucket to raise the machine body. If
oil leaks from the cylinder piping the hose was dis-
connected
from while the boom cylinder rod is ex-
tended, the cylinder is leaking inter
nally.
If there is no oil leak from the cylinder piping but the
boom cylinder rod is extended, the control valve is
leaking internally.
If the cylinder is damaged internally, the system
must be flushed out to remove any debris.
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