John Deere 318 - Manual (Page 288)

1a
DASH LAMPS DO
NOT OPERATE
Key switch OFF.
NOTE:
A—20-Amp Fuse
B—2-Amp Fuse
C—20-Amp Fuse
D—3-Amp Fuse
M55140 -UN-13APR95
M77926 -UN-12APR95
For machines:
316 (S.N. —475000)
318 (S.N. —475000)
420 (S.N. —595880),
disconnect fuse holders
and check 20-amp fuse
(A) and 2-amp fuse (B).
For machines:
316 (S.N. 475001— )
318 (S.N. 475001— )
420 (S.N. 595881— ),
remove and check
20-amp fuse (C) and
3-amp fuse (D).
FUSE OK: GO TO
;
,
Group 20.
FUSES BLOWN:
Replace fuse, then
repeat
;
FUSES BLOW AFTER
REPLACING: GO TO
;
, Group 20.
‘
STARTING CIRCUIT
CHECK
PTO switch OFF.
Hydrostatic lever in
N/STOP position.
M55029 -UN-09DEC89
Later Models; Depress
brake pedal(s).
Turn key switch to
START position.
LISTEN: Starter must
crank engine. Engine
must start and run (use
choke as needed).
OK: GO TO
Å
ENGINE CRANKS BUT
DOESN’T START: GO
TO
Æ
ENGINE DOESN’T
CRANK: Check fuses,
then GO TO
‘
, Group
20.
ENGINE STARTS, BUT
MISFIRES:
For Machines (S.N.
—420000);
GO TO
3j
For Machines (S.N.
420001— );
GO TO
3k
Æ
IGNITION CIRCUIT
(SPARK) CHECK
PTO switch OFF.
Hydrostatic lever in
N/STOP position.
Later Models; Engage
park brake.
Remove both engine
side panels.
M37088 -UN-29AUG88
Disconnect spark plug
wires from spark plugs
and connect one to a
spark tester. Other plug
wire must be grounded
to the engine.
Crank engine.
LOOK: Tester must
indicate a strong, blue
spark.
Repeat test on other
spark plug.
SPARK: GO TO
Section 220, Group 10
to check spark plug
gap.
NO SPARK: GO TO
Æ
,
Group 20.
MX,159024005,3 -19-16MAY95
MX,159024005,4 -19-17MAY95
MX,159024005,5 -19-17MAY95
Electrical System Checkout/Ignition Circuit (Spark) Check
TM1590 (17MAY95)
240-05-2
316, 318 & 420 Lawn and Garden Tractors
020895
240
05
2