Nordco Super Claws LS-2, Operation And Maintenance Manual

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Super Claws Model LS-2
TROUBLESHOOTING
MAR/2006 (4945-3500)
Section 6-9
HYDRAULIC SYSTEM
TROUBLESHOOTING GUIDE
PROBLEM
POSSIBLE
CAUSE
SOLUTION
Hydraulic pump does
not develop pressure
No hydraulic oil in tank (NOTE: if pump is
run without oil in tank, pump damage will
occur.)
Shut-off valve closed. (NOTE: if pump is
run with valve closed, pump damage will
occur.)
Main relief valve bypassing. (NOTE: oil
blowing past any relief valve can cause
oil to overheat.)
Main pump compensator setting is too
low.
Pump is defective.
Destroke valve stuck.
Pump switch turned off.
Check oil level. Refill tank.
Open valve completely.
Check and adjust pressure
setting on relief valve. (See
Pressure checks)
Adjust compensator setting.
(See Pressure Checks)
Refer to pump manual or
replace pump.
Repair or replace.
Turn on.
Hydraulic pump
excessively noisy
Cold oil.
Low oil level.
Oil viscosity too high (oil too thick)
System relief valve set too low.
Intake hose to pump restricted.
Defective pump.
Allow unit to warm up.
Check and add oil.
Drain and add correct oil as
specified under
"RECOMMENDED
LUBRICANTS".
Adjust pressure setting on relief
valve (see Pressure Checks)
Inspect and repair.
See pump manual, repair or
replace pump.
Machine will not propel
Main pump not developing pressure.
Propulsion relief setting too low.
See above.
Increase relief setting. (See
Pressure checks)
Hydraulic Oil
Overheats
Oil viscosity too high (oil too thick)
System relief valve set too low.
Oil lines damaged causing excessive
Drain and add correct oil as
specified under
"RECOMMENDED
LUBRICANTS".
Increase pressure setting on
relief valve (see Pressure
Checks)