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 TM 55-1905-220-14-11
5-132. SEWAGE DISCHARGE PUMP - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENT
3. Impeller
Clearance
NOTE
The impeller face must be within .015 inch (.038 cm) of suction wear plate for
most efficient operation.
a. Screws
1. Loosen jam nuts.
and
screws
2. Tighten screws evenly
with jam
until the impeller
nuts (75)
(55) just drags on
the suction wear
plate (36) when the
shaft (84) is turned
by hand.
3. Back off the screws
and place a .015
inch (.038 cm) shim
under the head of the
screws.
4. Turn screws up against
shims.
5. Tighten screws with
jam nuts pushing the
housing up against
the adjustment screws.
6. Retighten jam nuts.
5-1428
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