TM 9-2320-289-34
8-4.
POWER STEERING GEAR REPAIR (Con’t).
b. CLEANING AND INSPECTION
WARNING
1.
2.
3 .
4 .
5.
6.
7 .
8 .
l Dry cleaning solvent P-D-680 is toxic and flammable. Always
protective goggles and gloves and use only in a well-ventilated
wear
area.
Avoid contact with skin, eyes, and clothes and DO NOT breathe vapors.
DO NOT use near open flame or excessive heat, The solvent’s flash
point is 100°F-138°F (38°C-59°C). If you become dizzy while using
cleaning solvent, immediately get fresh air and medical help. If solvent
contacts eyes, immediately wash your eyes with water and get medical
aid.
. Compressed air used for cleaning purposes should never exceed 30 psi
(207 kPa). Use only effective chip guarding and personal protective
equipment (goggIes/shield, gloves, etc.), Failure to follow this warning
may result in injury to personnel.
Clean all parts with dry cleaning solvent, Dry with compressed air.
Inspect upper pitman shaft bearing and side cover. Replace bearing if needles do not rotate
freely. Replace side cover if bearing surfaces are scored,
Inspect pitman shaft and adjuster screw for excessive wear or damage. Replace if worn or
damaged or if adjuster screw is not free to turn.
Inspect worm gear, rack piston, and all balls for wear or damage, Replace worm gear, rack
piston, and balls as an assembly if worn or damaged.
Inspect rack piston ball return guide halves for wear or damage, Replace if worn or damaged.
Inspect adjuster plug threads, spacer, races, and bearings for wear or damage. Replace if
worn or damaged.
Inspect stub shaft, spool valve, and
valve assembly for wear or damage.
Replace valve assembly, spool valve,
and stub shaft as an assembly if worn
or damaged.
Inspect housing
Replace if worn
c .
ASSEMBLY
for wear or damage.
or damaged.
1 .
Place housing (7) in a soft-jawed vise
with side cover opening facing up.
2 .
Using a 3/8 in. drift punch and small
hammer, carefully tap new check
valve (46) into housing (7).
TA50491
8-22
