TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 403 of 775

TM 9-2350-311-10

3-4 TROUBLESHOOTING — CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE

4.

ENGINE CRANKS BUT FAILS TO START.

Step 1. Check FUEL gage.

Fill as necessary (para 3-5.2).

Step 2. Check to see if fuel shut off control assembly handle is pulled out.

Push fuel shut off control assembly handle in completely.

Step 3. Check for blocked fuel lines.

Remove any blockage. Disconnect and straighten kinked or pinched fuel lines. If fuel lines continue

to leak, notify unit maintenance.

Step 4. Check for sediment, water, or other evidence of contaminated fuel.

Drain primary and secondary fuel filters (para 3-5.2).

Step 5. Check for water and dirt in fuel tanks.

Remove dirt and water from fuel tanks (para 3-5.2).

NOTE

If improper fuel is suspected, notify unit maintenance.

5.

ENGINE DOES NOT ACCELERATE PROPERLY OR DOES NOT DEVELOP FULL POWER.

Step 1. Check for sediment, water, or other evidence of contaminated fuel.

Drain primary and secondary fuel filters (para 3-5.2).

Step 2. Check for fuel leaks.

Tighten fuel lines, fittings, and primary and secondary fuel filters.

Step 3. Check air cleaner indicator for evidence of restrictions in air cleaner filters.

If red, clean and service air cleaner filters (para 3-5.4).

Step 4. Check accelerator pedal for bends or binding.

Notify unit maintenance if bends or binding exists.

Step 5. Check accelerator pedal linkage for binding or damage.

Notify unit maintenance if binding or damage exists.

3-5