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 49 of 153
TM 9-2520-246-34
NOTE
During installation, place rear bearing on
the mainshaft and aline the bearing with
the transmission opening. Use wooden
block and mallet to drive the bearing into
place.
i. Fourth- and Fifth-Speed Synchronizer.
Firmly
apply downward pressure to the rear of the mainshaft
while sliding the fourth- and fifth-speed synchronizer
from the mainshaft. (See fig. 3-27.)
j. Mainshaft Assembly.
Hold the mainshaft in the
rear position as illustrated in figure 3-28, and tilt the
front of the shaft upward. Slide the mainshaft from
the first and reverse gear, leaving the gear in the case.
NOTE
During installation, slide the mainshaft into
the first and reverse gear and through the
transmission case bearing opening.
Figure 3-25. Removal of Input Shaft Bearing Cap.
k. Idler Gear Assembly.
Screw adapter (item 3,
table 2-1) into idler gear shaft. Thread slide handle
puller into adapter and pull idler gear shaft from
housing. (See fig. 3-29.) Tilt idler gear.
NOTE
During installation, insert the idler gear
shaft in the outer transmission case opening
and through the idler gear assembly. Aline
the shaft with the bracket opening and,
using a soft hammer, drive the shaft into
position. The indentation of the shaft must
be alined with the outer case housing and
cutaway section of the countershaft rear
bearing cap.
3-14
Figure 3-26. Removal of Mainshaft Rear Bearing.
l. Countershaft Rear Bearing.
Hold the
countershaft gears in locked position by using a wood
wedge block between the gears and the transmission
case. Remove the cotter pin from the countershaft
assembly, the retaining nut, and the washer. (See fig.
3-30.)
Figure 3-27. Removal of Fourth- and Fifth-Speed
Synchronizer.
NOTE
When installing the retaining nut, tighten
to 120-150 lb-ft torque.
m. Countershaft.
Slide the shaft rearward out of
the front bearing. Extend the shaft out of the front
bearing and extend the shaft through the rear bearing
bore, then remove the countershaft assembly from the
transmission case. (See fig. 3-31.)
n. Countershaft Front Bearing.
Using a soft drift
pin and mallet, working from inside the transmission
case assembly, drive the front bearing retainer from
the transmission case. (See fig. 3-32.) Remove bearing
from transmission case.
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