TM 9-2320-289-34
5-15.
TRANSMISSION OIL PUMP MAINTENANCE (Con’t).
c. CLEANING AND INSPECTION
1.
2.
3 .
4 .
WARNING
l Dry cleaning solvent P-D-680 is toxic and flammable, Always wear
protective goggles and gloves and use only in a well-ventilated 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 personnel protective
equipment (goggles/shield, gloves, etc.). Failure to follow this warning
may result in injury to personnel.
Clean pump cover and pump body and all removed components with dry cleaning solvent.
Remove all traces of RTV sealant from mating surfaces of oil pump seal and oil pump body.
Use compressed air to dry and open up any blocked oil passages.
Inspect pump body gear pockets and crescent for damage. Inspect oil passages to ensure that
they are open. Inspect for damaged bolt hole threads. Inspect face of pump body for scores or
nicks and for overall flatness. Inspect drive and driven gear and pump gear face for damage.
Replace oil pump assembly if any of these conditions exist.
Place drive and driven gears (26 and
27) in pump body (13) and check for
pump
body
face-to-gear
face
clearance.
Place a straightedge
across pump and gear face surfaces.
Use a feeler gage and measure
clearance between straightedge and
gears. Clearance should be between
0.0008 in. and 0.0035 in. (0,02 mm
and 0.09 mm). If gear clearance is
not within this tolerance, replace oil
pump assembly.
Inspect operation and meshing of
pump gears with gears installed as
marked,
Inspect for binding or
roughness. If gears bind or operate
roughly, replace oil pump assembly.
TA50257
5-76
