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 345 of 1313
POOR ACCELERATION AND/OR LACK OF POWER - Continued
STEP
3.
IS EXHAUST SYSTEM IS IN GOOD CONDITION?
Check exhaust system for restriction.
T0893DAA
Figure 3.
Exhaust System.
CONDITION/INDICATION
IS EXHAUST SYSTEM IS IN GOOD CONDITION?
DECISION
YES - Go to Step (4) to verify problem is solved.
NO - Front exhaust pipe damaged. Replace front exhaust pipe (Volume 2, WP
0276). Go to Step (14) to verify
problem is solved.
NO - Rear exhaust pipe damaged. Replace rear exhaust pipe (Volume 2, WP
0275). Go to Step (14) to verify
problem is solved.
NO - Muffler damaged. Replace muffler (Volume 2, WP
0274). Go to Step (14) to verify problem is solved.
NO - Exhaust stack damaged. Replace exhaust stack (Volume 2, WP
0273). Go to Step (14) to verify problem
is solved.
TM 9-2320-272-23-1
0014
0014-4
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