Section V. TEST AND ADJUSTMENT (MODELS 3052 AND 3053A)

TM 9-2520-246-34

Section IV. REPAIR (MODEL 3053A)

model 3052, both on the main drive shaft and on the

3-12. General. Disassembly and assembly

countershaft. For disassembly and assembly

procedures for transmission model 3053A are almost

procedures, refer to paragraphs 3-8, 3-9, 3-10, and 3-

identical to those of transmission model 3052 with the

11.

exception of the positions of fourth and fifth gears.

Therefore, the repeating of these procedures is not

NOTE

necessary. During the disassembly and assembly

procedures for the transmission, keep in mind that in

The input shaft is removed from the inside

transmission model 3053A the fourth and fifth speed

of case or towards the rear of the

gears are just the reverse of those in transmission

transmission.

Section V. TEST AND ADJUSTMENT

(MODELS 3052 AND 3053A)

3-13. General.

change in gear noise between each shift.

3-15. Power Test.

a. Lubrication. Remove transmission lubricant filler

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.

that the part or parts should be replaced when worn

beyond the limits given in the "Size and Fit of New

a. The wear limits are the same for transmission

Parts" column. In the "Size and Fit of New Parts"

model 3052 and transmission model 3053A.

column, the letter "L" indicates a loose fit (clearance)

and the letter "T" indicates a tight fit (interference). A

b. The repair and replacement standards included

double asterisk (**) in the "Wear Limits" column

herein give the minimum, maximum, and key

indicates that the part may be used by selective fitting

clearances of new parts. They also give wear limits

as long as the resulting fit is within the tolerance

which indicate the point to which a part or parts may

specified. The letters GA in the "Size and Fit of New

be worn before replacement, in order to receive

Parts" column mean gage.

maximum service with minimum replacement.

3-17. Repair and Replacement Standard Points

Normally, all parts which have not been worn beyond

the dimensions shown in the "Wear Limits" column or

of Measurement. Figures 3-37, 3-48, 3-49, and 3-50 and

damaged by corrosion will be approved for service.

corresponding tables 3-1, 3-2, 3-3, and 3-4 provide the

An asterisk (*) in the "Wear Limits" column indicates

repair and replacement points of measurement for

transmission models 3052 and 3053A.

3-21