Troubleshooting Guide
Hydraulic Problems
4
4-8
HDSdoc041118
Troubleshooting Guide
PROBLEM
CAUSE
SOLUTION
Pump Motor Runs With Little
Or No Response From The
Cylinders
Low fluid level
Check fluid level. Add an
all-season hydraulic fluid such as
Amoco Rycon Oil MV or Mobil
Multipurpose ATF (automatic
transmission fluid) until level is
4 - 4 1/2" from bottom of reservoir
with all cylinders retracted.
Pressure relief valve moved
from proper setting
Adjust pressure relief valve.
Low air temperature causing
fluid to thicken
Allow fluid to warm up. Synthetic
fluids are available that allow for
hydraulic operation in cold
weather conditions (Mobil SHC
526).
Fluid Leaks From Around
Cylinder Piston Ram
Worn seals
Replace seals in cylinder. Check
piston ram for abrasive weld that
may be causing premature seal
failure.
Fluid Leak Around Pump Box
Loose seal or fitting
Wipe pump off completely to
locate cause of lead. You may
have to unbolt the pump to wipe
behind it.
NOTE:
Movement of the
sawmill can cause fluid to slosh up
into the foam filter in the reservoir
cap, and subsequently spray out,
giving the appearance that fluid is
leaking from the pump.
