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 TM 5-1940-277-20
TM 1940-20/2
NOTE
Bronze impeller will be replaced with a plastic impeller and an additional flat washer.
Impeller is keyed to motor shaft with Woodruff key (7). When impeller is removed care
should be taken to retain key.
(MK1) Discard bronze impeller.
5.
(MK2) Inspect impeller (5) for damage and replace if required.
Using wrench, separate impeller housing (8) from motor (9) by removing two bolts (10) and lockwashers (11).
6.
Remove gasket (12) and discard.
7.
Using screwdriver remove two brush caps (13) from motor housing.
8.
Lift out brushes (14) and inspect for wear. Replace if worn to 1/4 inch.
9.
INSTALL:
NOTE
Brush must be installed with curved face in line with armature.
Install brushes (14) by inserting in motor housing. Install brush caps (13) and tighten using screwdriver.
1.
Install replacement gasket (12) on impeller housing (8).
2.
Fit motor (9) to impeller housing (8).
3.
Install two bolts (10) thru lockwashers (11), impeller housing (8) and gasket (12) into motor (9).
4.
Using wrench tighten bolts (10).
5.
Install plastic impeller (5) on motor shaft (6) insuring Woodruff key (7) is alined with impeller keyway on motor shaft (6).
6.
Install flat washer (4), lockwasher (3) and nut (2) on motor shaft (6) to secure impeller (5).
7.
Tighten nut (2) with impeller nut tool.
8.
(MK1) Install aft and forward electric bilge pumps (refer to paragraph 3-143).
9.
(MK2) Install aft electric bilge pump (refer to paragraph 3-143).
(MK2) Install forward electric bilge pump (refer to paragraph 3-144).
3-307
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