TROUBLESHOOTING
12
effect of trouble
possible cause
fault which needs remedy
cogging load
mechanical considerations
worn relief valve
needed repairs
worn
compensator
replace
slow response in
check valves
replace or relocate
excessive de-
compression
energy rates
improve decompression control
pressure shocks
Barrel blow-off
rotating group worn, excessive case pressure
compensator
instability
excessive line
capacitance
(line volume, line
stretch,
accumulator
effects)
reduce line size or lengths
eliminate hose
recheck case drain flow and repair as required
fluid too thin
excessive pump
leakage
improper assembly, port timing
set too low (compared to load or to compensator)
relief valve
instability caused by back pressure, worn parts
set too high (compared to relief)
compensator
worn parts
pump too large
for fluid needs
select smaller pump displacement
water turned off or too little flow
water too hot
fan clogged or restricted
efficiency reduced by mud or scale deposits
heat exchanger
intermittent hydraulic fluid flow
too little fluid
improper baffles
insulating air blanket that prevents heat rejection
heating of fluid
reservoir
heat pickup from adjacent equipment
Summary of Contents for COMPAX P1 Series
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