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  TM 3-6665-302-34
(7) Install retaining ring (33).
c. Alinement.
(8) Install voltage regulator (para 32b).
(1) Connect end play gage block and gage
block assembly from M74 test set as shown in
4-4. Gear Assembly Ball Bearings
(2) Position gear assembly (2) and pillow
housing (5) so that surfaces contact end play
a. Removal.
gage block (4) and gage block assembly (1).
(1) Remove pump assembly (para 3-24).
(3) Tighten screws (22, fig. 3-18) and re-
move end play gage block and gage block as-
(2) Remove cover (para 3-26a).
sembly.
(3) Remove terminal lugs (para 3-30a).
(4) Complete installation (b(7) through
(4) Remove pins (23).
(12) above).
(5) Remove screws (22) and lockwashers
(21).
4-5. Pump Unit Subassembly
(6) Remove pillow housing (20) and bear-
a. Disassembly.
ing (19).
(1) Remove gear assembly ball bearings
(7) Remove retaining ring (33) and washer
(para 4-4a).
(34).
(2) Remove motor (para 4-3a).
(8) Remove screws (8) and slide motor
partially from pump unit subassembly (29).
(3) Remove connecting rod assembly (para
(9) Remove gear assembly (17).
(4) Remove roller (para 3-34a).
(10) Pry ball bearing (16) from pump unit
subassembly (29).
(5) Remove catches (para 3-33a).
(6) Remove voltage regulator (para 3-32a).
b. Installation.
(7) Remove tubing, coupling, and pin (para
(1) Press ball bearing (16) into pump unit
subassembly (29).
(8) Remove screws (22, fig. 3-18), lock-
(2) Press ball bearing (19) into pillow
washers (21), and guide (18).
housing (20).
b. Reassembly.
(3) Insert gear assembly (17) into ball
bearing (16).
(1) Install gear assembly ball bearings
(4) Install pillow housing (20) so that ball
bearing (19) slips over shaft end of gear as-
(2) Insert violet lead from electrical con-
sembly (17).
nector (A1P1 (fig. 318)) through access hole in
top of pump unit subassembly (29).
(5) Install two screws (22) and lockwash-
ers (21). Do not tighten.
(3) Install and tighten two screws (5)
through electrical connector A1P1 to pump unit
(6) Perform alinement procedures (c be-
low).
subassembly (29).
(4) Install four rollers (31) on shafts and
(7) Position tube guide (18) over two
mounting holes in bottom of pump unit subas-
secure with retaining rings (32).
sembly (29). Screw pins (23) into bottom of
(5) Hold violet lead clear of motor (7).
tube guide (18).
Slide motor (7) into pump unit subassembly
(8) Tighten screws (8).
(29). Pull red and green leads through oval
slot.
(9) Install washer (34) and retaining ring
(33).
(6) Using detail A as a guide, solder red
and green leads from motor (7) to terminals
(10) Replace springs (14) on tube guide
on bottom of voltage regulator (6).
(18).
(7) Secure voltage regulator (6) to pump
(11) Test springs (para 3-27a).
unit subassembly (29) with screws (3) and
(12) Test pump assembly (fig. 3-7).
lockwashers (4).
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