ENGINE TROUBLESHOOTING - TM-10-3930-638-24-P0048

TM 10-3930-638-24&P

Para/Malfunction

Page

COOLING SYSTEM

Engine does not reach operating temperature

Cooling system not pressurized

2-12/3

2-26

GAGES

Engine oil pressure gage does not indicate correct pressure

2-13/1

2-27

Fuel gage does not register

2-13/2

2-28

Fuel gage does not indicate correct fuel level

2-13/3

2-28

2-9. ENGINE TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ENGINE HARD TO START OR WILL NOT START

WARNING

If NBC exposure is suspected, all air filter media should be handled by

personnel wearing protective equipment. Consult your unit NBC Offi-

cer or NBC NCO for appropriate handling or disposal procedures.

Step 1. Check if sir cleaner indicator red flag is in view.

a. If in view, depress reset button on tip of indicator and check that red flag disappears from view.

(If red flag does not disappear from view, replace air cleaner indicator as described in para

2-15c). Crank engine and check if red flag is in view; if red flag is in view, service sir cleaner

(para 2-15c).

b. If red flag is not in view, proceed to step 2 below.

Step 2. Check if fuel shut-off valve is in closed position.

a. If fuel shut-off valve is in closed position, place in open position as shown.

b. If fuel shut-off valve is in open position, proceed to step 3 below.

Step 3. Check if there is fuel in fuel tank.

a. If no fuel in fuel tank, fill tank.

b. If fuel in fuel tank, proceed to step 4 below.

Step 4. Check for air in fuel system.

a. Place ignition switch in ON position. Open bleed valve

plug on top of secondary fuel filter allowing air to bleed out

of both filters. When fuel, free of bubbles, starts to flow, close

bleed valve plug and wipe parts free of fuel. Place ignition switch

in OFF position.

b. If no air in fuel system, proceed to step 5 below.

2-12 Change 5