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Troubleshooting Guide
Hydraulic Problems
Troubleshooting Guide
60HDdoc042607
6-7
6
PROBLEM
CAUSE
SOLUTION
PUMP MOTOR RUNS WITH
LITTLE OR NO RESPONSE
FROM THE CYLINDERS
Low hydraulic fluid level.
Check fluid level. Add an all-season
hydraulic fluid such as Amoco Rycon
Oil MV, Mobil Multipurpose ATF (auto-
matic transmission fluid) or
Exxon/Esso Univis J26
until level is .75” (19 mm) from top of
reservoir with all cylinders retracted.
Pressure relief valve moved
from proper setting.
Adjust pressure relief valve. It can be
done by Wood-Mizer Customer
Service only.
Low air temperature causing
hydraulic fluid to thicken.
Allow fluid to warm up. Synthetic fluids
are available that allow for hydraulic
operation in cold weather conditions
(Mobil SHC 526).
PUMP MOTOR RUNS CON-
TINUOUSLY WHEN POWER
CONTACT IS MADE
Solenoid is stuck closed.
Tapping the solenoid may solve this
problem temporarily. Replace solenoid.
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 leak. 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.