TM 5-2420-230-24-1
TROUBLESHOOTING GUIDE
This section is designed to give you causes and possible remedies for the most common problems. Three (3)
columns which give you the Symptom, Possible Cause and Remedy are listed.
Symptom
Possible cause
Remedy
Damaged sector shaft seal
Replace sector shaft seal
Oil leaking at output shaft
of steering gear.
Worn or damaged oil seal
Replace actuating shaft seal
Oil leaking at actuating
shaft of steering gear
Damaged oil seal
Replace oil seal
Oil leaking at supply pump
Oil seal heat damaged
Check operating temperature
drive shaft
Loose or damaged bushing
Repair pump per pump ser-
on pump drive shaft
vice instruction
Water entry through reser-
Clean vent system or
Lubricant milky or white in
voir venting system
replace cap assembly
appearance
Clogged oil filter
Change oil and oil filter
Oil forced out of reservoir
Change more often
or foaming
Air in system
Bleed air from system
Check for air leak on suc-
tion side of supply pump
Relief plungers of steering
Adjust relief plungers (See
gear not adjusted properly
Common Procedures)
creating high operating
temperatures
Air leak in suction side of
Refer to pump servicing
supply pump
instructions
Pump cavitating
Check for restriction in
pump supply
Oil overheating
Check for restriction in
steering gear return
Faulty seal at pump drive
Repair pump
Engine oil in power steer-
shaft
ing reservoir (Gear driven
pump)
Faulty seal at accessory
Repair accessory drive
shaft driving supply pump
Operating temperatures too
Check and correct cause of
Lubrication oil discolored
high
overheating
Change intervals too long
Change oil more often
Incorrect lubricant used
Drain, flush and refill with
recommended fluid
Oil flow restriction
Check back pressure
High operating
temperatures
Oil flow too high
Check maximum oil flow
K-22
