Knife Is Down Before Operation - Horizon Fitness APC-61 Manual

2-12 Knife Is Down before Operation

After finishing operation of the day before and
turning off hydraulic pressure, the oil in
hydraulic circuit return to the tank because of
slight leak of oil from valves. Therefore knife
lowers depending on the amount of leak
through the night. As a result, when turning
on the power on the next day and pressing
hydraulic pressure switch, knife lifts a little to
return to the upper limit position. If knife is
not lower than clamp before turning on hy-
draulic pressure switch, there is no problem
for safety and operation.
When knife is lower than clamp, a large oil
leak is occurring in hydraulic system.
Remove the cover of the machine and check
hydraulic system by the following procedure.
WARNING
Turn power switch off before checking
hydraulic system.
Oil is leaking at hydraulic hose joint.
Touch the joint between hydraulic hose and
each hydraulic parts. If oil clings to your
finger, the connection of joint is not tight. Fix
the parts side by turning the pipe side.
Oil is leaking from hydraulic cylinder.
When oil is leaking from this part pointed by
an arrow, the problem with the cylinder pack-
ing can be considered. Replace cylinder or
disassemble the cylinder and replace rod
packing.
When replacing rod packing, replace
also dust wiper.If knife still lowers,
there is problem with interior
packing inside. Replace the whole
cylinder.
2-21
C spring to return the knife is cut.
C spring
When C spring is cut or loose, the force to
return the knife to upper limit position weak-
ens and knife lowers even by a slight oil leak.
When spring is cut, replace it.
I Bolt
Hydraulic Cylinder