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TM 9-2320-364-34-4
20-285
(5)
Install 5/16-18 by 2 in. screw (15) in
impeller (16).
NOTE
Limits for gear backlash are
0.001 to 0.006 in. (0.025-0.152
mm). If correct backlash cannot
be obtained, replace water
pump.
(6)
Place plunger of dial indicator against
screw (15). Rotate impeller (16) and read
backlash.
(7)
If backlash is less than 0.001 in. (0.025 mm)
or greater than 0.006 in. (0.152 mm), loosen
two screws (7) and (10) and pivot water
pump (9) to obtain proper backlash.
(8)
Remove screw (15) and dial indicator.
(9)
Tighten screws (7) and (10) 45 to 50 lb-ft
(61 to 68 N.m).
Use care when installing
retaining rings. Retaining rings
are under tension and can act as
projectiles when released
causing injury to personnel.
(10)
Apply lubricating oil to preformed
packing (17) and install with pump
cover (18) and retaining ring (19).
(11)
Using soft face hammer strike retaining
ring (19) inward two or three times until
ring fully seats in groove.
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