TM 3-6665-302-34
GENERAL SUPPORT MAINTENANCE
M43 DETECTOR UNIT PUMP ASSEMBLY (1A2A1)
Section I.
(6) Install terminal lugs (para 30b).
General
(7) Center connecting rod assembly (35)
General support maintenance personnel are au-
and diaphragm (36) in hold in pump unit sub-
thorized to replace the connecting rod assembly
assembly (29).
and motor of the M43 detector unit pump as-
(8) Install and aline head assembly (para
sembly.
(9) Install cover (para 3-26b).
NOTE
(10) Install pump assembly (para 3-25).
Refer to TB SIG 222 for instructions
regarding soldering techniques.
4-3. Motor
a. Removal.
4-2. Connecting Rod Assembly
(1) Remove pump assembly (para 3-24).
a. Removal.
(2) Remove dust cover (para 3-26a).
(3) Partially remove voltage regulator (para
(1) Remove pump assembly (para 3-24) and
cover (para 326a).
(4) Remove retaining ring (33, fig. 3-18)
(2) Remove terminal lugs (para 3-30a).
and washer (34) from motor shaft.
(3) Remove head assembly (para 3-31a).
(4) Remove retaining ring (33) and washer
(5) Remove terminal lugs (para 3-30a).
(6) Remove screws (8).
(34).
(7) Remove motor (7) from pump unit sub-
(5) Remove screws (8, fig. 3-18).
assembly (29).
(6) Pull motor (7) from pump unit sub-
assembly (29) to free connecting rod assembly
b. Installation.
(35).
(1) Hold violet wire clear of motor (7).
(7) Remove connecting rod assembly (35)
Slide motor (7) into pump unit subassembly (29)
and diaphragm (36) as an assembly.
until motor shaft passes through hole in connect-
(8) Remove screw (38), washer (37), and
ing rod assembly (35).
diaphragm (36).
(2) Pull red and green wires through oval
b. Installation.
slot in pump unit subassembly (29).
(1) Position diaphragm (36) on connecting
(3) Insure that gear on shaft of the motor
rod assembly (35) with flat side of outside edge
(27) meshes with gear assembly (17).
toward bearing.
(2) Secure washer (37) and diaphragm (36)
NOTE
to connecting rod assembly (35) with screw (38).
(3) Position connecting rod assembly (35)
Some replacement motors (7) require
in pump unit subassembly (29) so that exposed
# 4 4 0 by 0.250-inch screws (8) for
bearing end is towards motor (7). Slide motor
i n s t a l l a t i o n instead of the #4-40 by
(7) into pump unit subassembly (29) so that its
0.188-inch screws originally used.
shaft is centered in the connecting rod assembly
(4) Install and tighten screws (8) to secure
(35) bearing.
motor (7) to pump unit subassembly (29).
(4) Install screws (8).
(5) Replace terminal lugs (para 3-30b).
(5) Install washer (34) and retaining ring
(6) Slide washer (34) over motor shaft.
(33) on shaft of motor (7)
Change 1 4 - 1
