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 14 of 153
TM 9-2520-246-34
(2) Although transmission models 3052 and
3053A appear outwardly identical, the internal
mechanism is different. Transmission 3052 is equipped
with five forward speeds and fifth speed is a direct
drive. Transmission model 3053A also is a five-speed
transmission, but fourth speed is a direct drive and
fifth speed is overdrive. The different shift patterns for
each transmission are shown in figures 1-3 and 1-4.
(3) Transmission model 3052 is installed on all
M44, 2½-ton, 6x6 series trucks equipped with a
gasoline engine. Transmission model 3053A is
installed on all M44A1 and M44A2, 2½-ton, 6x6
series trucks equipped with a multifuel engine.
c. Transfers.
(1) Transfer models T-136-21 and T-136-27 are
two-speed synchromesh units driven from the
transmission through a propeller shaft. The transfers
distribute power to front and rear axles through
propeller shafts.
(2) Positive locking transfer, model T-136-27,
shown in figures 1-5 and 1-6 is a two-speed
synchromesh unit driven by the transmission propeller
shaft. This transfer is equipped with an air selector
valve that enables the air locking assembly to engage
the front output shaft to the rear output shaft for
driving the front axle. Selection of the high or low
ranges of the transfer provides the truck operator with
a total of ten forward speeds and two reverse speeds.
(3) Transfer model T-136-21, figures 1-7 and 1-8,
is designed to drive the front axle slightly slower than
the rear axles and this difference in speed is taken up
by an overrunning sprag unit on the front output
shaft during normal operation. When the rear wheels
lose traction, the sprag unit automatically engages and
the front wheels also drive the vehicle. Refer to
Chapter 4 for a detailed description and operation of
transfers T-136-27 and T-136-21.
(4) Vehicle model application.
(a) Transfer model T-136-21 can be used on all
M44 and M44A1, 2½-ton, 6x6 series trucks.
Figure 1-5. Positive Locking Transfer Model T-136-27 (Front View).
1-3
Back to Top
