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 56 of 153
TM 9-2520-246-34
Section IV. REPAIR (MODEL 3053A)
3-12. General.
Disassembly and assembly
procedures for transmission model 3053A are almost
identical to those of transmission model 3052 with the
exception of the positions of fourth and fifth gears.
Therefore, the repeating of these procedures is not
necessary. During the disassembly and assembly
procedures for the transmission, keep in mind that in
transmission model 3053A the fourth and fifth speed
gears are just the reverse of those in transmission
model 3052, both on the main drive shaft and on the
countershaft. For disassembly and assembly
procedures, refer to paragraphs 3-8, 3-9, 3-10, and 3-
11.
NOTE
The input shaft is removed from the inside
of case or towards the rear of the
transmission.
Section V. TEST AND ADJUSTMENT
(MODELS 3052 AND 3053A)
3-13. General.
change in gear noise between each shift.
a. Lubrication.
Remove transmission lubricant filler
3-15. Power Test.
plug and make sure transmission is filled to the proper
level with correct lubricant before testing. Refer to
a. Operation Analysis.
Operate transmission in each
lubrication order LO 9-2520-209-12/1 for lubrication
shift position with varying torque on input shaft and
specifications.
listen for unusual gear noises that would indicate
gears not fully in mesh or more than normal clearance
b. Preparation for Test.
Assemble transmission to
between the gear teeth. Pay particular attention to any
an engine installed on the dynamometer.
tendency to slip into neutral.
3-14. Shift Test.
Shift transmission through the
b. Leakage Check.
During power test, check
entire gear range while in operation. Shift lever should
outside of transmission case and cover for lubricant
shift transmission easily, without binding, and snap in
leakage at gasket joints and shaft seals. Check
and out of gear with no tendency to slip out of gear
thoroughly all over the transmission assembly for any
or slide into neutral. There should be a definite
leakage or malfunction.
Section VI. REPAIR AND REPLACEMENT STANDARDS
(MODELS 3052 AND 3053A)
3-16. General.
a.
The wear limits are the same for transmission
model 3052 and transmission model 3053A.
b.
The repair and replacement standards included
herein give the minimum, maximum, and key
clearances of new parts. They also give wear limits
which indicate the point to which a part or parts may
be worn before replacement, in order to receive
maximum service with minimum replacement.
Normally, all parts which have not been worn beyond
the dimensions shown in the “Wear Limits” column or
damaged by corrosion will be approved for service.
An asterisk (*) in the "Wear Limits" column indicates
that the part or parts should be replaced when worn
beyond the limits given in the “Size and Fit of New
Parts” column. In the “Size and Fit of New Parts”
column, the letter "L" indicates a loose fit (clearance)
and the letter "T" indicates a tight fit (interference). A
double asterisk (**) in the “Wear Limits” column
indicates that the part may be used by selective fitting
as long as the resulting fit is within the tolerance
specified. The letters GA in the “Size and Fit of New
Parts” column mean gage.
3-17. Repair and Replacement Standard
Points
of Measurement. Figures 3-37, 3-48, 3-49, and 3-50 and
corresponding tables 3-1, 3-2, 3-3, and 3-4 provide the
repair and replacement points of measurement for
transmission models 3052 and 3053A.
3-21
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