TM-9-2520-246-34-1
TRANSMISSION MODEL 3053A; TRANSMISSION TRANSFERS MODEL T-136-21 AND MODEL T-136-27; POWER TAKEOFFS MODEL WN-7-28, MODEL WND-7-28 AND MODEL P-136-C
TECHNICAL MANUAL; MAINTENANCE, DIRECT SUPPORT AND GENERAL SUPPORT LEVEL
JANUARY 1981
TM-9-2520-246-34-1 - Page 11 of 418
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
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