TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 418 of 1313
EXCESSIVE EXHAUST NOISE - Continued
CONDITION/INDICATION
ARE EXHAUST PIPES AND GASKETS IN GOOD OPERATING CONDITION?
DECISION
NO - Front exhaust pipe damaged. Replace front exhaust pipe (Volume 2, WP
0276). Go to Step (3) to verify
problem is solved.
NO - Front pipe gasket damaged. Replace gasket (Volume 2, WP
0276). Go to Step (3) to verify problem is
solved.
NO - Rear exhaust pipe damaged. Replace rear exhaust pipe (Volume 2, WP
0275). Go to Step (3) to verify
problem is solved.
NO - Rear pipe gasket damaged. Replace gasket
(Volume 2, WP
0275). Go to Step (3) to verify problem is
solved.
NO - Exhaust stack damaged. Replace exhaust stack (Volume 2, WP
0273). Go to Step (3) to verify problem
is solved.
NO - Exhaust stack gasket damaged. Replace gasket (Volume 2, WP
0273). Go to Step (3) to verify problem
is solved.
YES - Go to Step (3) to verify problem is solved.
STEP
3.
IS YOUR ORIGINAL EXHAUST NOISE PROBLEM STILL PRESENT?
a.
Ensure vehicle is returned to normal operating condition.
b.
Check to see if your original exhaust noise problem still exists.
CONDITION/INDICATION
IS YOUR ORIGINAL EXHAUST NOISE PROBLEM STILL PRESENT?
DECISION
YES - Notify supervisor.
NO - Problem fixed.
END OF WORK PACKAGE
TM 9-2320-272-23-1
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