Chapter 1. GENERAL MAINTENANCE INFORMATION

TM 9-2520-246-34-1

CHAPTER 1

GENERAL MAINTENANCE INFORMATION

1-1.

SCOPE.

a. This manual contains the direct support and general support maintenance

instructions for transmission model 3053A, transmission transfer models T 136-21 and

T-136-27, and power takeoff models WN-7-28, WND-7-28, and P-136-C. This manual

includes procedures for disassembly, cleaning, inspection, repair, test, adjustment,

and overhaul as authorized by the maintenance allocation chart.

b. Appendix A gives a list of current and applicable references to the trans-

mission, transfers, and power takeoffs used on the 2 l/2-ton, 6x6 series trucks,

equipped with multifuel engines.

c. Refer to TM 9-2520-246-34P for a listing of parts and special tools for the

maintenance of the transmission, transmission transfers, and power takeoffs for the

2 l/2-ton, 6x6 series trucks.

1-2. GENERAL MAINTENANCE. General maintenance tasks relating to inspection

care and maintenance of antifriction bearings are given in TM 9-214. Welding proce-

dures that apply to this type of equipment are given in TM 9-237. For the lubrication

of the transmission, transfers, and power takeoffs covered in this manual, refer to

LO 9-2320-209-12/1.

1-3. TROUBLESHOOTING. Troubleshooting a fault within the transmission, trans-

mission transfers, transmission power takeoff and transmission transfer power take

off is done as part of the repair procedures. Regardless of the symptom, all

replaceable parts must be inspected and/or tested for serviceability. Any parts found

to be faulty must be replaced during the reassembly process. In addition, test pro-

cedures are given to make sure the reassembled equipment is working properly.

1-4. CLEANING. Refer to TM 9-247 for cleaning materials for this type of equipment.

Special cleaning procedures for the transmission, transmission transfers, and power

takeoffs are given in chapter 2.

1-5. PAINTING. For painting instructions for field use of the equipment covered in

this manual, refer to TM 43-0139.

1-6. TORQUE VALUES. Critical torque values for a particular component are given

in the maintenance procedures in chapter 2. When torque values are not given, bolts,

screws and nuts are to be tightened as given in table 1-1.

1-7. SPECIAL TOOLS AND EQUIPMENT. Special tools and equipment are provided

to make it easier to do particular maintenance tasks and to keep the equipment in good

repair. Table 1-2 lists the special tools and equipment and gives a reference to the

maintenance paragraph where they are used and what they are used for.

1-8. SAFETY INSPECTION AND TESTING OF LIFTING DEVICES. Refer to

TB 43-0142 for safety inspection and testing of lifting devices used in this manual.

1-9. FORMS AND RECORDS. Maintenance forms, records, and reports which are to

be used by maintenance personnel at all levels are listed in and prescribed by

TM 38-750.

1-10. EQUIPMENT IMPROVEMENT REPORT AND MAINTENANCE DIGEST (EIR MD)

AND EQUIPMENT IMPROVEMENT REPORT AND MAINTENANCE SUMMARY (EIR MS).

The quarterly Equipment Improvement Report and Maintenance Digest, TB 43-0001-39

series, contains valuable field information on the equipment covered in this manual.

1-1