TROUBLESHOOTING

TROUBLESHOOTING

TESTING AND ADJUSTMENT

Problem

Cause

Correction

1. ENGINE WILL NOT START

Air In The Fuel System

Find the air leak in the fuel system and correct it. Loosen each fuel line nut at the

(CONT.)

injection pumps and open the manual bleed valve. Loosen the bolts that hold the

torque spring or stop bar cover. This will let out any air that is in the governor

housing. After all air is out of fuel system, tighten bolts that hold torque spring or

stop bar cover. Tighten fuel line nuts according to the SPECIFICATIONS. Close

manual bleed valve.

Fuel System Not Timed Correctly to

Make adjustment to timing if necessary.

Engine

Replace constant bleed valve.

Constant Bleed Valve Stays Open

(Not enough fuel pressure for

starting)

No Over Fueling Spring

Install an over fueling spring.

2. MISFIRING OR RUNNING

Fuel Pressure is Low

Make sure there is enough fuel in the fuel tank. Look for leaks or bad bends in the

ROUGH

fuel line between fuel tank and fuel transfer pump. Look for air in the fuel system.

Check fuel pressure. The outlet pressure of the fuel transfer pump at full load speed

is 30 5 psi (2.1 0.4 kg/cm ).

If fuel pressure is lower than above pressure, install a new fuel filter element.

Inspect the fuel bypass valve for free movement. Install a new fuel bypass valve if