YATO YT-55580, Instruction Manual, Page: 12 / 44

12
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O R I G I N A L I N S T R U C T I O N S
Solution of problems
The lower beam
lifts during work
The lower beam
cannot be
lowered
The lower beam
cannot be
lowered fully
The pump of
the hydraulic
cylinder springs
during lifting
The piston of
the hydraulic
cylinder does
not fully open
Oil leakage from
under the plug
X X X
There may be insufficient quantity of oil in the
hydraulic cylinder. Fill the oil tank.
X X X X
Air in the hydraulic system. Purge the hydraulic
system.
X
There may be excessive quantity of oil in the press.
Remove the excess of oil
X X
The valves may not close completely. Lift the arm
of the device a couple of times without any load
and then lower it.
X
Moving elements are not lubricated. Distorted
elements of the transmission system of the arm.
X X
The release valve is not completely closed.
Close the release valve.