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 37 of 153
TM 9-2520-246-34
Figure 3-2. Transmission Models 3052 and 3053A
Equipped With a Power Takeoff.
(4) Second Speed Power Flow.
Power is
transmitted by the countershaft second-speed reverse-
idler gear to the mainshaft second-speed gear, which is
coupled to the mainshaft by the second-third gear
synchronizer, and to the main shaft. (See fig. 3-12,
view C.)
(5) Third Speed Power Flow.
Power is
transmitted by the countershaft third-speed gear and
to the mainshaft third-speed gear, which is coupled to
the mainshaft by the second-third speed synchronizer,
and through the mainshaft. (See fig. 3-12, view D).
(6) Fourth Speed Power Flow.
Power is
transmitted by the countershaft fourth-speed gear
through the mainshaft fourth-speed gear, which is
coupled to the mainshaft by the fourth-fifth speed
synchronizer, and to the mainshaft. (See fig. 3-12,
view E.)
(7) Fifth Speed Power Flow.
Power is
transmitted by the input gear, which is coupled to the
mainshaft by the fourth-fifth speed synchronizer,
directly to the mainshaft. Since the interlocking action
of the synchronizer in effect makes one continuous
shaft of the input shaft and mainshaft, the drive here
is direct, i.e., a 1.00-1.00 ratio. (See fig. 3-12, view F.)
3-3. Data.
National stock number . . . . . . . . . . 2520-00-347-4520
Ordnance number . . . . . . . . . . . . . . . . . . . . . . . 7520995
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spicer
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3052
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Synchromesh
Speeds:
Forward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Gear types:
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helical
Mainshaft (except first-reverse) . . . . . . . . . Helical
Mainshaft (first-reverse) . . . . . . . . . . . . . . . . . . Spur
Countershaft (except first) . . . . . . . . . . . . . . Helical
Countershaft first . . . . . . . . . . . . . . . . . . . . . . .
Spur
Reverse idler . . . . . . . . . . . . . . . . . . . . .
Spur-helical
Bearings:
Input shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ball
Mainshaft front . . . . . . . . . . . . . . . . .
Straight roller
Mainshaft rear . . . . . . . . . . . . . . . . . . . . . . . . Ball
Countershaft front
. . . . . . . . . . . . . .
Straight roller
Countershaft rear . . . . . . . . . . . . . . . . . . . . . . . . Ball
Reverse idler
. . . . . . . . . . . . . . . . . . .
Straight roller
Lubrication capacity:
W/O pto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8½ pt
W/pt o . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
10½ pt
Input shaft size:
Spline diameter . . . . . . . . . . . . . . . . . . . . . . 1.499 in.
Number of splines . . . . . . . . . . . . . . . . . . . . . . . 10
Full length of splines
. . . . . . . . . . . . . . . . .
2.375 in.
Mainshaft (output end) size:
Spline diameter
1.499 in.
. . . . . . . . . . . . . . . . . . . . .
Number of splines . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Full length of splines . . . . . . . . . . . . . . . . . 1.906 in.
Gear ratios:
First speed
. . . . . . . . . . . . . . . . . . . . . . .
7.55 to 1.00
Second speed
. . . . . . . . . . . . . . . . . . . . .
4.18 to 1.00
Third speed . . . . . . . . . . . . . . . . . . . . . . 2.45 to 1.00
Fourth speed . . . . . . . . . . . . . . . . . . . . . 1.45 to 1.00
Fifth speed . . . . . . . . . . . . . . . . . . . . . . . 1.00 to 1.00
Reverse . . . . . . . . . . . . . . . . . . . . . . . . 7.36 to 1.00
3-2
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