CHAPTER 1. INTRODUCTION - TM-9-2520-246-340012

TM 9-2520-246-34

CHAPTER 1

INTRODUCTION

Section I. GENERAL

1-1. Scope.

g. Refer to TM 9-2520-246-34P for a listing of parts

and special tools for the maintenance of the

a. This manual contains the direct support and

transmissions, transfers, and power takeoffs for the

general support maintenance instructions for

2-ton, 6x6 series trucks.

transmission models 3052 and 3053A; transfer models

T-136-21 and T-136-27; power takeoff models WN-7-

1-2. Maintenance Forms and Records.

28, WND-7-28, and P-136-C. This manual also

Equipment maintenance forms and procedures for

provides descriptions of these items and procedures

their use are contained in TM 38-750, The Army

for troubleshooting, removal, disassembly, assembly,

Maintenance Management System (TAMMS).

cleaning, inspection, test, adjustment, installation,

repair, and rebuild, as directed by the maintenance

1-3. Quality Assurance/Quality Control. Repair

and replacement standards for transmissions,

allocation chart.

transfers, and power takeoffs are supplied in each

chapter. Through compliance with the engineering

b. Chapter 2 contains information on repair parts,

tolerances specified in this manual for repairs and

tools, troubleshooting. general maintenance

adjustments, maintenance of quality control is

instructions, and removal and installation of major

assured.

components.

c. Chapter 3 contains all repair and overhaul

1-4. Equipment Improvement Recommenda-

procedures pertinent to transmission models 3052 and

tions. EIR's will be prepared on DA Form 2407,

3053A.

Maintenance Request. Instructions for preparing

EIR's are provided in TM 38-750, The Army

d. Chapter 4 provides all the repair and overhaul

Maintenance Management System. EIR's should be

procedures pertinent to transfer models T-136-21 and

mailed directly to: Commander, U.S. Army Tank-

T-136-27.

Automotive Materiel Readiness Command, ATTN:

DRSTA-MP, Warren, Michigan 48090. A reply will

e. Chapter 5 contains all the repair and overhaul

be furnished directly to you.

procedures for power takeoff models WN-7-28, WND-

7-28, and P-136-C.

f. Appendix A provides a list of current and

1-5. Use of Metric Measurement Units. The

applicable references to the transmissions, transfers,

equipment described herein is nonmetric and does not

and power takeoffs used on the 2-ton, 6x6 series

require metric common or special tools; therefore,

trucks.

metric units are not supplied.

Section II. DESCRIPTION AND DATA

1-6. Description.

b. Transmissions.

a. General. A short description covering each

transmission, transfer, and power takeoff is provided.

(1) Transmission models 3051 and 3053A (fig. 1-1

The descriptions are used to familiarize direct support,

and 1-2) are manual shift, synchromesh, selective gear

general support, and depot maintenance personnel

types with five speeds forward and one reverse. The outer

with the different types and models of each unit. For

cases are made of cast iron and serve as a support for the

a more detailed description and operation of each

various bearing shafts and other parts of the transmission

assembly, refer to Chapters 3, 4, and 5. Differences

gear train. For a more detailed description and operation

between models, if pertinent, are included.

refer to Chapter 3.

1-1