TM 5-4210-233-14&P-2
6-6. FIRE PUMP - Continued
d. Assembly of Transmission.
(1)
Keep reusable bearings covered and new bearings wrapped until they are to be installed. Before
pressing a ball bearing on a shaft, coat bearing bore with Dexron II oil (Item 12, Appendix E).
Apply Dexron II oil (Item 12, Appendix E) to the outside of needle bearings. Always apply force to
the inner race of a ball bearing when pressing it on a shaft, and to the outer race if pressing into a
bore. Press on evenly with a piece of pipe or tube which just clears the shaft. Apply force to the
cup of a needle bearing when pressing it into the bore with a pipe or tube which just clears the bore.
Be sure shafts, bores, and pipe or tube used for pressing out bearings are clean before installing
bearings.
(2)
Before installing an oil seal in its housing, coat seal OD evenly with silicone grease (Item 11,
Appendix E). Be sure that seal, shaft, and housing are clean. Always install a seal with the seal lip
facing in. Apply force to the outer edge of a seal, and press in evenly.
(3)
If a gasket is awkward to hold in place while assembling a component, coat one of the mating
flanges with silicone grease (Item 11, Appendix E) and press the gasket into position against the
flange. The grease will hold the gasket in place during reassembly.
(4)
Press new oil seal (77) into oil seal housing (71).
(5)
Press inner bearing (74) up against shoulder on driven shaft (67). Slide spacer (75) on the shaft up
against the bearing (74).
(6)
Install key (68) in the keyway in the shaft up against the. spacer (75).
(7)
With the cap (42) resting on its base, position the driven sprocket (26) inside of the cap (42) and at
the same time take the driven shaft (67), bearing (74), spacer (75) and key (68) assembled
previously and from the face of the cap (42) that fastens to the pump body, slide the driven shaft
through the bore in the cap (42) into the bore in the driven sprocket (26) lining up the key (68) in
the shaft with the keyway in the sprocket. Tap bearing (74) into the bore in the cap (42). If the key
(68) moves axially in its keyway, tap the key back into full engagement with the driven sprocket
(26). Install spacer (76) on the driven shaft (67) up against the sprocket (26).
(8)
Place cap (42) and driven shaft assembly (67) under a press with the face of the cap supported on
blocking allowing the internal spline end of the driven shaft (67) to contact and rest on the table of
the press. Position outer bearing (73) on shaft and press the bearing (73) on the shaft tight up
against spacer (76).
(9)
Remove cap (42) and driven shaft assembly (67) from the press and install the bearing lockwasher
(64) and locknut (65). Make sure the tang of the washer is in the keyway in the shaft. Tighten nut
(65) and bend one of the locking tangs on the washer (64) into one of the slots in the locknut (65).
(10)
Position new gasket (72) on housing (71) and install housing (71) on cap (42). Fasten in place with
cap screws (69) and lockwashers (70).
6-20
