Troubleshooting Guide
Hydraulic Problems
Troubleshooting Guide
HDdoc012020
4-8
4
PROBLEM CAUSE
SOLUTION
Pump Motor Runs With Little
Or No Response From The
Cylinders
Low battery
Test battery. Recharge or replace as necessary
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)
Pump Motor Runs Continu-
ously When Power Contact Is
Made
Solenoid is stuck closed
Tapping the solenoid may solve this problem
temporarily. Replace solenoid
Fluid Leaks From Around Cyl-
inder 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, giv-
ing the appearance that fluid is leaking from the
pump