TM 5-3810-300-24 & P2
TROUBLE SHOOTING.
Listed below are some troubles that may occur to the Power Steering System.
TROUBLE
PROBABLE CAUSE
REMEDY
1. Noisy pump
a. Low oil supply
a.
Fill reservoir.
b. Oil too heavy, (i.e. viscous)
b.
Change to proper viscosity.
c. Air leak in inlet line
c.
Check plumbing.
d. Partly blocked inlet line
d.
Check for foreign
object and/or clean.
2. Foaming oil
a. Pump cavitation
a.
See 1a, 1b, 1c, 1d.
b. Water in the oil
b.
Check reservoir and/
or heat exchange.
3. Pump or oil Overheating
a. Oil supply too thin
a.
Drain & fill with proper
viscosity oil.
b. Oil supply contaminated
b.
Drain, clean filter, & fill with
clean oil.
c. Pump cavitating
c.
See 1a, 1b, 1c, 1d.
d. Pump drive shaft excessively
d.
Check alignment. misaligned
with pump driven shaft.
e. Pump drive shaft axially loaded
e.
Check for clearance at ends of
by driving shaft (Prime Mover)
shafts, for shaft misalignment
or worn driving keys, keyways
or splines. If pulley drive check
for belt alignment.
f.
System relief valve bypassing
f.
Check relief valve setting
(see 4c).
4. Low flow
a. Pump cavitating
a.
See la, lb, lc, ld.
b. Foaming oil
b.
See 2a, 2b.
c. Relieve valve leaks or set too low
c.
Check relief valve for foreign
particles.
d. Speed too low
d.
Check prime mover speed.
e. Oil too hot
e.
Check temperature
(see 3a, 3b, 3c, 3d, & 3e).
5. Failure to build
a. Defective Relief Valve pressure
a.
Check and reset or replace.
b. Low oil supply
b.
Fill reservoir.
4-331
