TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 95 of 343
TM 9-2350-358-BD
SECTION II.
ENGINE FAILURE
4-4.
GENERAL
Engine internal components are not easy BDAR fixes because of the tolerances and balances necessary to contain the
pressure and forces of the burning fuel, and the need for mechanical integrity of the reciprocating and rotating parts.
The
best repair for internal engine components is replacement parts from the supply system.
a.
It is possible, however, to mix and match parts from two or more damaged engines to reassemble one good
engine with used parts.
Example, if one engine has a damaged cylinder set or top end, the good
cylinder/head set can be matched with a good, used short block to build a serviceable spare.
b.
Certain internal engine component failures such as cam followers or rocker arm shaft galling may be ignored.
Other failures, such as broken rings and galled pistons will result in engine destruction if the vehicle is
operated.
4-3
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