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 REMEDY
PROBABLE CAUSE
TROUBLE
a. Fill reservoir
a. Low oil supply
Noisy Pump
1.
b. Change to proper
b . Oil too heavy,
(i.e. viscous)
viscosity
c. Air leak in inlet line
c. Check plumbing
d . Partly blocked inlet
d . Check for foreign object
line
and/or clean
a. See 1a, 1b, 1c, 1d
Foaming Oil
a. Pump cavitating
2.
b. Check reservoir and/or
b . Water in the oil
heat exchange
a. Drain & fill with proper
a . Oil supply too thin
Pump or oil overheating
3.
viscosity oil
b. Drain, clean filter, & fill
b. Oil supply contaminated
with clean oil
c. Pump cavitating
c. See 1a, 1b, 1c, 1d
d. Check alignment
d. Pump drive shaft exces-
sively misaligned with
pump driven shaft
e. Check for clearance at ends
e. Pump drive shaft axially
o f shafts, for shaft mis-
loaded by driving shaft
alignment or worn driving
(Prime Rover)
keys, keyways or splines.
If pulley drive check for
belt alignment
f . Check relief valve setting
f . System relief valve by-
(see 4c)
passing
a. Pump cavitating
a. See 1a, 1b, 1c, 1d
4. Low Flow
b. See 2a, 2b
b. Foaming oil
c. Check relief valve for
c . Relief valve leaks or
f o r e i g n particles
set too low
d . Speed too low
d. Check prime mover speed
e. Check temperature (see 3a,
e. Oil too hot
3 b , 3 c 3d & 3e)
a . Defective Relief valve
a. Check and reset or replace
Failure to build
5.
b. Low oil supply
b. Fill reservoir
pressure
NOTE
Always check the TROUBLE SHOOTING LIST before a pump is
removed or disassembled.
5-92H
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