TM-5-5420-202-10
LAUNCHER, M48A5 TANK CHASSIS
OPERATOR'S MANUAL
DECEMBER 2009
TM-5-5420-202-10 - Page 244 of 535
0040
TM 5-5420-202-10
SYMPTOM
MALFUNCTION
CORRECTIVE ACTION
Engine smokes.
DARK OR BLACK
SMOKE BLOWS
THROUGH
REAR GRILLE
DOORS (AFTER
WARM-UP).
CAUTION
If engine oil pressure indicator shows
in red, stop engine. Refer to
WP 0015. Continued operation may
cause engine damage. Failure to
comply may result in equipment damage.
STEP 1. Feel rear grille doors for oil. If oil is present,
notify f eld maintenance.
STEP 2. Check engine oil level. Refer to WP 0074.
STEP 3. If engine oil level is too high (overfull), notify
f eld maintenance.
STEP 4. If engine oil level is correct, perform steps
2, 3, and 4 of "Engine runs rough or does not idle
properly after warm-up."
Engine runs rough.
ENGINE RUNS
ROUGH OR
DOES NOT
IDLE PROPERLY
(AFTER WARM-
UP).
CAUTION
DO NOT push manifold heater switch
while operating purge pump handle in
step 1. This may damage the intake
manifold. Failure to comply may result
in equipment damage.
STEP 1. Pump purge pump handle until back
pressure is felt. If engine still does not run properly,
shut down engine. Refer to WP 0015.
NOTE
Armored Vehicle Launched Bridge
(AVLB) vehicles may not be equipped
with air restriction indicators. If the
vehicle does not have air restriction
indicators, go to step 3.
STEP 2. Visually check both air restriction indicators
(WP 0071), if equipped, for condition of air cleaner
f lters. Air restriction indicators will be either a window
that reads clear or red, or a window that measures
restriction.
STEP 3. If vehicle is equipped with indicator windows
that read clear, red, or green, attempt to reset
restriction indicators by pushing reset button
(WP 0071).
STEP 4. If either indicator shows red band after
resetting, notify f eld maintenance.
STEP 5. If both indicators show clear, go to step 10.
STEP 6. If vehicle is equipped with indicator windows
that measure restriction in degrees, and indicators
have a reading of 30 inches or more, as shown by
red disc, f lter elements need to be cleaned. Notify
f eld maintenance.
0040-4
Table 1.
Engine - Continued.
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