John Deere 318 - Manual (Page 342)

Æ
STARTER DRAW
TEST
Before performing
starter draw test, test
battery. (See Battery
Tests
B
in Group 20
of this section.)
M37179 -UN-25JAN90
Disconnect and ground
spark plug wires.
M36655 -UN-25JAN90
IMPORTANT: Before
making any test
connections, turn load
knob (A) on meter
fully
counterclockwise.
Connect JT05685
Battery Tester to
machine battery. Red
lead to positive (+)
terminal, black lead to
negative (—) terminal.
Crank engine with
starter and read voltage
on meter while
cranking.
Use a photo
tachometer such as
JT05719 to check
engine rpm while
cranking. Engine should
crank at approximately
300 rpm.
With key switch at OFF
position, adjust load
knob (A) until battery
voltage reads the same
as when cranking.
Read amperage on
meter. Amperage
should read 250 amps
or less.
Immediately after test,
turn load knob (A) fully
counterclockwise.
250 AMPS OR LESS
AT 300 RPM: Starter
OK.
250 AMPS OR LESS
BUT RPM IS LESS
THAN 300:
For Machines:
316 (S.N. —362983)
318 (S.N. —364137)
420 (S.N. —360009)
GO TO
3b
For Machines:
316 (S.N. 362984— )
318 (S.N. 364138— )
420 (S.N. 360010— )
GO TO
3e
MORE THAN 250
AMPS:
For Machines:
316 (S.N. —362983)
318 (S.N. —364137)
420 (S.N. —360009)
GO TO
3a
For Machines:
316 (S.N. 362984— )
318 (S.N. 364138— )
420 (S.N. 360010— )
GO TO
3d
MX,159024030,4 -19-16MAY95
Electrical System Component Tests and Adjustments/Starter Tests
TM1590 (17MAY95)
240-25-2
316, 318 & 420 Lawn and Garden Tractors
020895
240
25
2