Operation and maintenance manual

Troubleshooting Symptoms Charts B3.9, B4.5, B5.9 Industrial
Page TS-20 Section TS - Troubleshooting Symptoms
Engine Difficult to Start or Will Not Start (Exhaust Smoke)
Cause Correction
STEP 10
Fuel leak
.............
Check the fuel lines, fuel connections, and fuel
filters for leaks. Check the fuel lines to the supply
tanks. Refer to the OEM service manual.
OK
Go To Next Step
STEP 11
Air in the fuel system
.............
Check for air in the fuel system. Tighten or replace
the fuel connections, fuel lines, fuel tank standpipe
and fuel filters as necessary. Vent air from the
system. Refer to a Cummins® Authorized Repair
Location.
OK
Go To Next Step
STEP 12
Air intake system restriction is above specification
.............
Check the air intake system for restriction. Clean
or replace the air filter and inlet piping as
necessary. Refer to Procedure 010-059 (Air
Cleaner Restriction) in Section 4.
OK
Go To Next Step
STEP 13
Fuel grade is not correct for the application or the
fuel quality is poor
.............
Operate the engine from a tank of high-quality fuel.
Refer to Procedure 018-002 (Fuel
Recommendations and Specifications) in Section
V.
OK
Go To Next Step
STEP 14
Fuel filter is plugged
.............
Measure the fuel pressure before and after the fuel
filter. Refer to Procedure 006-014 (Fuel Filter -
Canister Type) or Procedure 006-015 (Fuel Filter -
Spin-on) in Section 5.
OK
Go To Next Step
STEP 15
Fuel supply is not adequate
.............
Check the flow through the filter to locate the
source of the restriction. Refer to a Cummins®
Authorized Repair Location.
OK
Go To Next Step
STEP 16
Fuel pump overflow valve is malfunctioning
.............
Check the overflow valve. Replace if necessary.
Refer to a Cummins® Authorized Repair Location.
OK
Go To Next Step
STEP 17
Fuel lift pump is malfunctioning
.............
Check the fuel lift pump for correct operation.
Check the pump output pressure. Replace the fuel
lift pump if necessary. Refer to a Cummins®
Authorized Repair Location.
OK
Go To Next Step