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 50 of 987
TM 9-2320-285-24-1
2-8.
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
LOW ENGINE OIL PRESSURE (Cont)
Step 5.
Check if engine oil is too light.
a.
If engine oil is too light, drain engine oil (para 2-12b), replace engine oil filters (para 2-12c and 2-12d),
and refill crankcase with correct weight oil (para 2-12b).
b.
If engine oil is not too light, check for engine oil leaks (refer to Malfunction 5 above).
7.
EXCESSIVE EXHAUST SMOKE
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 for incorrect or contaminated fuel in fuel tank (if contaminated, fuel will have a milky-white
coloring).
a.
If fuel is incorrect grade or contaminated, drain, clean, and fill fuel tank (para 2-13b(1)) and replace fuel
filters (para 2-13c).
b.
If fuel is not contaminated, go to step 5 below.
2-27
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