roubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Section TS - Troubleshooting Symptoms
Engine Difficult to Start or Will Not Start (Exhaust Smoke) (Continued)
Check the flow through the fuel filter. Replace
the fuel filter if necessary. Refer to Procedure
Fuel filter or fuel inlet restriction
006-015. Clean all prefilters and screens.
Check the fuel suction line for restriction.
No. 1 diesel fuel and other light winter fuels
are lower in heat content than No. 2 diesel fuel
and result in higher fuel consumption. Evaluate
fuel consumption using No. 2 diesel fuel. Fuel
uel quality is poor or diesel fuel grade No. 1
additives also result in lower heat content.
is used above 0C [32F]
Refer to the Fuel Recommendations/
Specifications in the Operation and Mainte-
nance Manual, B Series Engines, Bulletin No.
uel pump return overflow valve is malfunction-
Inspect the return overflow valve. Replace if
necessary. Refer to Procedure 006-044.
Make sure the fuel return line is plumbed to
uel return line improperly plumbed
the bottom of the fuel tank.
Inspect the fuel transfer pump. Replace if
uel transfer pump malfunctioning
necessary. Refer to Procedure 005-045.
Put the engine at top dead center. Check and
uel injection pump timing is not correct
adjust the fuel timing. Refer to Procedure
Inspect the air cooler for internal and external
harge-air cooler restricted (if equipped)
restriction. Replace the restricted cooler if
necessary. Refer to Procedure 010-027.
Check and adjust the valves. Refer to Proce-
alves are not sealing correctly