Troubleshooting Guide
Hydraulic Problems
Troubleshooting Guide
HDSdoc030722
4-9
4
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.
