LT3-00032-2-A - DDKS Industries, hydraulic components distributor

TROUBLESHOOTING
TROUBLESHOOTING
(continued)
effect of trouble possible cause fault which needs remedy
pressure shocks cogging load mechanical considerations
worn relief valve needed repairs
worn compen- needed repairs
sator
slow response in replace or relocate
check valves
servo pressure increase pressure and check pressure drop
too low to through servo filter
maintain firm
control
excessive de- improve decompression control
compression
energy rates
excessive line reduce line size or lengths
capacitance eliminate hose
(line volume,
line stretch,
accumulator
effects)
barrel blow-off re-check pump hold-down, rotating group, drain
pressure
heating of fluid excessive pump re-check case drain flow and repair as required
or motor leak- fluid too thin
age
improper assembly, port timing
relief valve set too low(compared to load or to compensator)
instability caused by back pressure, worn parts
compensator set too high (compared to relief)
worn parts
pump too large
for fluid needs
heat exchanger
reservoir
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
intermittent hydraulic fluid flow
too little fluid
entrained air in fluid
improper baffles
insulating air blanket that prevents heat rejection
heat pickup from adjacent equipment
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