Operations Instructions
Form No. 102561
PROBLEM
CAUSE
SOLUTION
Cylinder(s) will not retract
(1) Check the system pressure; if
the pressure is zero, the control
valve is releasing pressure and the
problem may be in the cylinders,
(mechanical linkage connected to
cylinders), or quick-disconnect
couplings.
(2) Defective valve
(3) Inadequate air pressure
(1) Check the cylinders for broken
return springs and check couplers to
insure that they are completely
coupled. Occasionally couplers have
to be replaced because one check
does not stay open in the coupled
position.
(2) Check valve operation and
instpect parts. Replace if necessary.
(3) Increase air pressure.
Pump delivers excess oil pressure
(1) Check pressure gauge
(2) Relief valve not properly set
(1) Calibrate gauge
(2) Reseat the relief valve
Sheet No.
4 of 4
Rev. 3 Date: 25 May 2012
