Hobart 60PL20 Operation And Maintenance Manual page 87

TROUBLE, SYMPTOM
AND CONDITION
ENGINE AND CONTROLS (CONTINUED)
3. Engine will not
start. Cranking
speed normal (Continued).
4. Engine is hard to
start. Cranking
speed normal.
5. Engine starts.Stops
after a few seconds
by automatic shut-
down.
December 31/91 Revised
PROBABLE CAUSE
(7) Defect in inject-
or racks or link-
age
A. Low ambient temper-
ature, 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-
ment
A. The shut-down circuit
may have functioned
normally to stop the
engine because of low
lubricating oil pressure.
TEST, CHECK, AND/OR
REMEDY
(7) Refer to Perkins
Handbook. Make adjust-
ments and/or repairs
according to instruc-
tions therein.
A. Check causes and remedies
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 Perkins Handbook.
(3) Check gasket in accor-
dance with instructions
in Perkins Handbook.
(4) Check and adjust valve
clearance in accordance
with instructions in
John Deere Handbook.
A. Restart the engine, hold
permissive start switch in
START position, and observe
oil pressure gage. If oil
pressure is 12 psi or more,
and the engine shuts down
when the permissive start
switch is released to the
run position, put a jumper
wire across oil pressure
switch terminals "C" and
"NO". Restart engine. If
the engine continues to run
when the permissive start
switch is released to the
RUN position, the oil
pressure switch is
defective. Replace oil
pressure switch
OM-2053
3-1
Page 9