TM 5-3895-373-34
2.42
REPLACE/REPAIR AUXILIARY PUMP - Continued.
D.
INSPECT Continued.
4.
INSPECT FRONT PLATE, BACKPLATE, AND
ADAPTER PLATE ASSEMBLY BEARINGS FOR WEAR.
a.
Use a telescoping gage set and slide caliper to
measure inside diameters of bearings inside
front plate assembly (19), backplate assembly
(23), and adapter plate assembly (22).
b.
If inside bearing diameter is greater than 0.691
in. (17, 55 mm) replace front plate assembly
(19), backplate assembly (23), or adapter plate
assembly (22).
c.
Check position of oil grooves in front plate
assembly (19) and backplate assembly (23)
bearings. Verify that oil groove in upper bearing
is at 12 o’clock position and that oil groove in
lower bearing is at 6 o’clock. If oil groove is out
of position, replace front plate assembly or
backplate assembly.
d.
Check that bearing faces are flush with island
faces of front plate assembly (19). Replace front
plate assembly if bearings are not flush with
islands.
5.
INSPECT PUMP BODY INNER DIAMETERS FOR
WEAR.
a.
Use a telescoping gage set and slide caliper to
measure inner diameters of pump bodies (20
and 21).
b.
If largest inside diameter of pump body (20 or
21) is greater than 1.719 in. (43, 66 mm),
replace pump body.
c.
Inspect faces of adapter plate assembly (22) and
backplate assembly (23) for scoring and material
loss due to gear wear. If depth of wear exceeds
0.0015 in. (0, 038 mm), replace worn plate
assembly.
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