TROUBLESHOOTING - TM-5-3895-349-14-P0410

TROUBLESHOOTING

TESTING AND ADJUSTMENT

Problem

Cause

Correction

2. MISFIRING OR

RUNNING

Leak or Break in Fuel Line Between

Install a new fuel line.

ROUGH (CONT.)

Injection Pump and Injection Valve

Wrong Valve Clearance

Make adjustment according to Specifications.

Defect in Fuel Injection Nozzle

Run engine at rpm that gives maximum misfiring or rough running. Then loosen a

fuel line nut on the injection line for each cylinder, one at a time. Find the cylinder

where loosening the fuel line nut does not change the way the engine runs. Test the

fuel injection nozzle for that cylinder. Install new parts where needed.

Wrong Fuel Injection Timing

Make adjustment to timing.

STALL AT LOW RPM

Fuel Pressure is Low

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

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/cm2).

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

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

necessary.

Idle rpm Too Low

Make adjustment to governor so idle rpm is the same as given in the RACK

SETTING INFORMATION.

Defect in Fuel Injection Nozzle

Install a new fuel injection nozzle.

Wrong Valve Clearance

Make adjustment according to Specifications.

Spring for Dashpot

Governor

Install spring correctly.

Installed Wrong