TM-9-2520-246-34
TRANSMISSION MODEL 3052, NSN 2520-00-347-4520
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL
MAY 1978
TM-9-2520-246-34 - Page 91 of 153
TM 9-2520-246-34
4-25. Assembly of Transfer (Sequence).
g.
Idler shaft driving gear (fig. 4-31).
a.
Idler shaft rear bearing cover (fig. 4-35).
h.
Input shaft front bearing cover (fig. 4-31).
b.
Rear output shaft rear bearing cover (fig. 4-35).
i.
Front output shaft and reverse shift shaft
assembly (fig. 4-32).
c.
Input shaft assembly, fork assembly, and idler shaft
assembly (fig. 4-33).
j.
Front output shaft cover assembly (fig. 4-29, 4-
32).
d.
Transfer top cover and shifter shaft (fig. 4-34).
k.
Companion flanges (fig. 4-30).
e.
Rear output shaft assembly (fig. 4-33).
l.
Handbrake drum and shoe assembly (fig. 4-27, 4-
f.
Case cover (fig. 4-31).
28).
Section VII. TEST AND ADJUSTMENT (MODEL T-136-21)
4-26. General.
This section provides for the tests
and adjustments of model T-136-21 transfer.
4-27. Lubrication.
Tighten drain plug (fig. 4-27). Lay
transfer on side with filler plug up (fig. 4-26). Remove
filler plug and pour ½ pint of universal gear lubricant
(GO), MIL-L-2105, through the plug opening. Install
and tighten plug. Lubrication of complete unit should be
accomplished after installation. Attach tag to filler plug
giving instructions for filling before transfer is placed in
service. Refer to paragraph 4-20 and lubrication order
(LO 92320-209-12/1) for lubrication specifications.
Tighten filler plug to 40-55 lb-ft torque.
4-28. Shift Test.
a. Neutral.
Place shifter shaft in neutral position
(between “low” (shifter shaft out) and “high” (shifter
shaft in)). Turn input shaft by hand. Front and rear
output shafts should not turn.
b. High.
Push shifter shaft in to shift to high
position. Turn input shaft in clockwise direction. Rear
output shaft should revolve in same direction. Front
output shaft should not turn.
c. Low.
Pull shifter shaft out to shift to low
position. Turn input shaft by hand and note if rear-
output shaft turns approximately one-half as fast as
when in high (b above).
d. Sprag Unit Test.
With shifter shaft in either low
or high position, front output shaft should turn freely
in a clockwise direction but should not turn
counterclockwise when input shaft is held stationary.
With reverse shift shaft held in, front output shaft
should turn freely in counterclockwise direction but
should not turn clockwise when input shaft is held
stationary.
4-29. Handbrake Test.
Pull handbrake lever (fig. 4-
27) to engage brake shoes with handbrake drum.
Release lever and note if shoe return spring pulls free
of drum. For vehicle test refer to TM 9-2320-209-
20/1.
4-30. Handbrake Shoe Adjustment.
If shoes do
not clear drum (4-29 above), check adjustment of shoe
anchor pin. If outer shoe is free on anchor pin, tighten
bolt in shoe stop to increase shoe-to-drum clearance.
For in-vehicle adjustment refer to TM 9-2320-209-
20/1.
4-31. Adjustment of Rear Output Shaft Bearing.
a. Test Bearing Adjustment.
Reach inside of case
and turn rear output shaft assembly. Shaft should
drag slightly when turned by hand. If tests indicate
bearings are too tight or too loose, shims must be
added or removed as directed in b below.
b. Add or Remove Shims.
Remove six capscrews
and lockwashers holding the rear output shaft-rear
bearing cover (fig. 4-35) to case, and remove cover.
Add or remove shims as required to obtain a slight
drag when shaft assembly is turned by hand from
inside the case. Place cover on case, making sure pin
in cover enters hole in case. Install six capscrews and
lockwashers and tighten to 60-77 lb-ft torque.
c. Add Shim.
When slight drag adjustment has
been obtained, remove rear output shaft rear bearing
cover and add one 0.003-inch shim. Install cover (b.
above). This will provide and ensure the proper end
play.
4-32. Adjustment of Idler Shaft Bearing.
a. Test Bearing Adjustment.
Reach inside of case
and turn idler shaft assembly. Shaft should have slight
4-30
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