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TROUBLE, SYMPTOM
AND CONDITION
ENGINE AND CONTROLS (CONTINUED)
3. Engine will not
start. Cranking
speed normal.
4. Engine is hard to
start. Cranking
speed normal.
August 5/89 Revised
PROBABLE CAUSE
(6) Faulty fuel pump
(a) Relief valve
not seating
(b) Worn pump
gears or damaged pump
drive
(7) Defect in inject-
or racks or linkage
A. Low ambient temperature, A. Check causes and remedies
or limited fuel
B. Low compression which
may be caused by any
one of the following:
(1) Sticking or
burned exhaust
valves
(2) Compression rings
worn or broken
(3) Cylinder head
gasket leaking
(4) Improper valve
clearance adjust-
Trouble Shooting Chart (Sheet 3 of 20)
Figure 5
TEST, CHECK, AND/OR
REMEDY
(6) Check pump.
(a) An open relief valve
will cause low out-
put pressure.
(b) Check pump for normal
operation. Re-
place if defective.
(7) Refer to Cummins Diesel
Handbook. Make adjust-
ments and/or repairs
according to instruc-
tions therein.
under ENGINE, Trouble 3,
above.
B. Check compression in accor-
dance with Para. 9, C and D.
(1) Cylinder head must be
removed and overhauled
to correct this condi-
tion.
(2) Check rings in accor-
dance with instructions
in Cummins Diesel Hand-
book.
(3) Check gasket in accor-
dance with instructions
in Cummins Diesel Hand-
book.
(4) Check and adjust valve
clearance in accordance
OM-2031
3-1
Page 11
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