User Manual

SERIES 50 OPERATOR'S GUIDE
Hard Starting Symptoms and Pr ob ab l e Causes
Probable Causes
Engine Will
Not Rotate
Low
Cranking
Speed
Engine
Cranks But
Will Not Start
Low Battery Voltage X X
Loose cranking motor
connections
X
Faulty cranking motor X X
Faulty cranking motor switch X X X
Internal seizure X
Improper lube oil X
Circuit breaker/electronic
control malfunction
X
Fuse blown or missing X
Insufficient Fuel Supply
Air in fuel
X
Outoffuel
X
Loose fue l connections
X
Cracked fuel lines
X
Obstructed fuel filters/lines
X
Faulty fuel pump
X
Faulty injector operation X
Restricted fuel fitting missing
X
DDEC Malfunction
X
Installation/operation of fuel
check valve or sh utoff valve
X
Low Compression
Worn intake and exhaust
valves
X
Worn piston rings/li ners
X
Leaking cylinder head gasket X
Improper intake and exhaust
valve adjustments
X
All information subject to change without notice. (Rev. 01/04) 117
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION