12
Troubleshooting Guide
TROUBLESHOOTING AND ELECTRICAL
SYSTEM: DIESEL VEHICLES
_
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
REFER TO
Fuel tank is empty
Fuel with low cetane number
Use specified fuel. See owner’s manual.
Excessively high viscosity fuel or engine oil
Use specified fuel and engine oil. See owner’s
manual.
Water in fuel system
Replace fuel and fuel filter.
Fuel filter clogged
Replace fuel filter.
Fuel line or pipe(s) clogged
Clean or replace fuel line and/or pipe(s).
Fuel leak caused by loose injection pipe
retaining nut
Tighten nut. See the Kubota D722 diesel
engine manual (CC P/N 103840201).
Air in fuel system
Injection nozzle clogged
Injection pump failed
Fuel pump failure
Incorrect injection timing
Excessive valve clearance
Improper valve seat alignment, valve spring
broken, or valve seized
Improper valve timing
Piston ring worn
Cylinder compression leak
Fuel cam shaft worn
Seizure of crankshaft, camshaft, piston, or
bearing
See the Kubota D722 diesel engine manual
(CC P/N 103840201).
Fuel solenoid failure
Test Procedure 27 – Fuel Solenoid Pull Coil
Circuit on page 12-37 and Test Procedure 28 –
Fuel Solenoid Hold Coil Circuit on page 12-37
Engine does not start (starter motor functions).
Improper idle governor adjustment
Idle RPM Adjustment on page 16-19
TABLE CONTINUED ON NEXT PAGE
Page 12-2
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Summary of Contents for Carryall 1500 2016
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