TM 55-1930-203-10
Table 3-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ENGINE WILL NOT START (cont' )
d
CAUTION
If a warning light goes on during operation, shut down engine involved and investigate trouble.
4. Warning lights. The master warning light (fig. 3-10) will light up when any of the port or starboard warning lights (fig.
3-11) located on
the cab bulkheads illuminate. Check that all warning lights go
out after each engine has been started.
Figure 3-11. Battery-generator indicator and starboard warning light panel.
(2) Starting from engine well. The same instructions apply as for starting from the cab (para (1) above) except that the starter
NOTE
Insure emergency shutoff lever (fig. 3-4) is in the down (or run) position before attempting to start an engine. If the first engine does
not start after four 30-second efforts, notify organizational maintenance. Starting requires a minimum of 45 p.s.i. air pressure in
warm weather, and between 75 p.s.i. and 100 p.s.i. in cold weather. If air pressure is below 45 p.s.i. and the engine cannot be
started, it will be necessary to get air from an outside source. For this reason, a LARC working alone will carry a portable air
compressor and sufficient fuel for operation. LARC's operating in a team
of six or less will carry one air compressor for the whole team.
t.
After engine has been started, close the valve (fig. 3-9) in the crossover line from the air starting line to the tire inflation
line.
g.
Open the valves on both air tanks.
h.
When sufficient air pressure has built up in air tanks, start the remaining engines.
i.
Release lock valve stem (fig. 3-7) in wheel and adjust all tires to operating pressure.
2.
ENGINE LACKS POWER
Step 1. Check engine water ternperature gage on gage board for overheated engine.
Fill coolant level in expansion tank to 2 inches below filler neck.
Step 2. Inspect for insufficient air in engine compartment by using special tester furnished with unit.
Clean engine compartment vents using a brush and air hose.
Step 3. Inspect for partly closed emergency engine shutoff lever (fig. 3-4).
Return lever (fig. 3-4) to down (or run) position. If malfunction is not corrected, report to organizational
maintenance.
3.
ABNORMAL ENGINE COOLANT TEMPERATURES
Step 1. Inspect expansion tank (fig. 3-12) for low coolant level.
Make sure coolant level in expansion tank (fig. 3-12) is 2 inches below filler neck.
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