TM-9-2520-234-35

POWER TRAIN ASSEMBLY; ALLISON MODEL XTG411-2A

TECHNICAL MANUAL; FIELD AND DEPOT MAINTENANCE MANUAL

JULY 1962

TM-9-2520-234-35 - Page 99 of 323

PAR 63-65

CHAPTER 4

TROUBLESHOOTING

Section I. GENERAL

63. PURPOSE

Note : Information in this chapter

is for use by Ordnance mainte-

nance personnel, in conjunction

with and as a supplement to the

troubleshooting section in the ap-

plicable TM-20 manual. It provides

continuation of instructions where

a remedy in the Unit level mainte-

nance manual refers to Ordnance

maintenance personnel for cor -

rective action.

Operation of a deadlined vehicle without

a preliminary examination can cause fur-

ther damage to a disabled component and

possible injury to personnel. By careful

inspection and troubleshooting, such dam-

age and injury can be avoided. In addition,

the causes of faulty operation of a vehicle

or component can often be determined

without extensive disassembly.

64. GENERAL INSTRUCTIONS AND

PROCEDURES

Note:

This

chapter

contains

inspection

and

troubleshooting

procedures to be performed while

a disabled component is stil l

mounted in the vehicle as well as

after it has been removed.

a . The inspections made while the

component is mounted in the vehicle are,

for the most part, visual and are to be

performed before attempting to operate

the vehicle. The object of these inspec-

tions is to determine the condition of

these components and, if found defective,

to take precautions to prevent any further

damage.

b . The troubleshooting performe d

while the component is mounted in the

vehicle is that which is beyond the scope

of the using organization.

Check th e

troubleshooting section of the applicable

TM-20 manual, then proceed as outlined

in this chapter.

c . If the component alone is received

by the Ordnance establishment, inspection

is performed to verify the diagnosis made

when the component was in the vehicle, to

uncover further defects, or to determine

malfunctions. This inspection is particu-

larly important because it is often the

only means of determining the malfunction

without completely disassembling the

component.

Section II. TROUBLESHOOTING PROCEDURES

65. OPERATING CHARACTERISTICS

a . Construction Features. Refer to

pars. 8 through 27 for description and

To perform effective troubleshoot -

operation of transmission components.

ing, the mechanic must have a thorough

knowledge of the construction features

b . Functions of Components. Refer

and operating characteristic s

of

the

to pars. 28 through 58 for explanations of

power train. Particular attention should

power train hydraulic operations an d

be accorded to the subjects outline d

power flow through the power train com-

below .

ponents.

Change 2 69