7. TROUBLESHOOTING B. HYDRAULIC SYSTEM...
’ B. HYDRAULIC SYSTEM TROUBLESHOOTING
; Loss of available engine horsepower to the saw may
) be caused by a wide variety of factors. The specific
engine problem is to be corrected before any
hydraulic components are replaced.
Power Pack, Pressure Testing
1. Open (n) the flow control and disconnect the 3.
Check that pressure reaches 125 bar (1850
hoses.
PSI). Make sure engine speed remains at 3400-
3500 RPM’s
2. Start the Power Pack, run engine RPM’s to
3400-3500 and close (n) the flow control.
4.
If pressure is insufficient, adjust relief valve.
NOTE: For more in depth troubleshooting, consult Parter Industrial Products.
SYMPTOM POSSIBLE CAUSE
REMEDY
Loss of hydraulic power or
hydraulic pressure
Valve lever not traveling full
distance.
Stretched throttle valve cable.
Clean debris from valve lever.
_-
Relief valve set too low.
Inspect throttle cable for
damage.
Replace if
necessary.
Pressure check relief valve
setting. Adjust or replace
valve.
Relief valve spring broken.
Chip under relief valve or
damaged seat.
Replace spring and readjust.
Remove valve, clean and
flush manifold body.
Reassemble and readjust.
Oil level too low.
Improper engine speed.
Add oil.
Check speed with tacho-
meter. Readjust if necessary.
Loss of pump efficiency.
Test, using flow meter, and
replace if necessary.
Excessive internal leakage in
Test, using flow meter and
control valve or motor.
replace or rebuild.
Pump drive connection to
engine defective.
Check for loose set screws,
sheared keys, broken or worn
drive coupling.
Replace as
needed.
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