TM-9-2320-285-24-1
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-1 - Page 45 of 987
TM 9-2320-285-24-1
2-8.
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
ENGINE LACKS POWER
Step 1.
Check if air cleaner restriction indicator red band is in view.
a.
If red band is in view, go to step 2 below.
b.
If red band is not in view, go to step 4 below.
Step 2.
Shut down engine, press reset button on top of restriction indicator, and check that red band disappears
from view.
a.
If red band does not disappear from view with engine shut down and reset button depressed, replace air
cleaner restriction indicator (para 2-13a).
b.
If red band disappears from view, go to step 3 below.
Step 3.
Start engine.
a.
If red band reappears when engine is cranked, service air cleaner (para 2-13a).
b.
If red band does not reappear, go to step 4 below.
Step 4.
Check exhaust pipes, muffler, and exhaust stack for foreign matter.
a.
If foreign matter is present, remove (para 2-14a and 2-14b).
b.
If foreign matter is not present, go to step 5 below.
Step 5.
Shut down engine.
Have an assistant fully depress accelerator pedal; watch throttle
arm rotation.
With accelerator pedal fully depressed, try to extend throttle arm
rotation manually.
a.
If throttle arm moves farther when rotated manually, adjust or
repair throttle linkage (para 2-13e).
b.
If throttle arm does not move farther when rotated manually, go to step 6 below.
Step 6.
Check fuel filter for clogged condition.
a.
If fuel filters are clogged, replace (para 2-13c).
b.
If fuel filters are not clogged, go to step 7 below.
2-22
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