TM 5-3805-281-24-2
Fuel System
DIAGNOSING FUEL SYSTEM
MALFUNCTIONS
Refer to Group 105 of CTM134, Operation and
Diagnostics, to diagnose the fuel system components.
For diagnosis of electronic controls, refer to the following:
CTM68 for BOSCH controls or CTM134 for later John
Deere controls.
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1923OCT971/1
RELIEVE FUEL SYSTEM PRESSURE
CAUTION: Escaping diesel fuel under pressure
can have sufficient force to penetrate the skin,
causing serious injury. Before disconnecting
lines, be sure to relieve pressure. Before
applying pressure to the system, be sure ALL
connections are tight and lines, pipes and
hoses are not damaged. Keep hands and body
away from pinholes and nozzles which eject
fluid under pressure. Use a piece of cardboard
or wood, rather than hands, to search for
suspected leaks.
If ANY fluid is injected into the skin, it must be
surgically removed within a few hours by a
doctor familiar with this type injury or gangrene
may result. Doctors unfamiliar with this type of
injury may call the Deere & Company Medical
Department in Moline, Illinois, or other
knowledgeable medical source.
Any time the fuel system has been opened up for service
(lines disconnected or filters removed), it will be necessary
to bleed air from the system. (See BLEED FUEL SYSTEM
in Group 105 of CTM134.)
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