John Deere 318 User Manual

Page 347

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4b

Stator Resistance
Test

Key switch OFF.

Stator leads
disconnected from
regulator.

NOTE: Because of the small amount of
resistance in the stator windings, use a digital
multimeter or an analog meter with a high
sensitivity rating to measure resistance of stator
windings. If an analog meter is to be used, make
sure it is at the lowest scale setting and is
zeroed.

M37209 -UN-25JAN90

Connect ohmmeter to stator leads (A). Compare
reading with specification (listed in chart) of
engine being tested.

NOTE: The “Spec” letter is the last letter of the
engine model number.

“P” SERIES ENGINE

RESISTANCE

(P218G and P220G)

(ohms)

Spec “A” . . . . . . . . . . . . . . . . . . . . . . . 0.06—0.10
Spec “B” and “C” . . . . . . . . . . . . . . . . . 0.10—0.19

“B” SERIES ENGINE

RESISTANCE

(ohms)

B43E . . . . . . . . . . . . . . . . . . . . . . . . . 0.10—0.20
B43G and B48G . . . . . . . . . . . . . . . . . . 0.30—0.50

RESISTANCE NOT
OK: Replace stator.

RESISTANCE OK:
Verify all connections
are good. Clean or
replace connections as
necessary.

Ö

PTO CLUTCH
ADJUSTMENT
CHECK

M36659 -UN-25JAN90

Key switch OFF.

Check armature-to-rotor
clearance using a feeler
gauge.

Insert feeler gauge
through slot (A) in
brake plate.

Clearance should be
0.46 mm (0.018 in.)

NOTE: There are three
slots around the clutch
for checking clearance.
Check clearance at all
slots.

CLEARANCE OK:
Repair or replace clutch
assembly. (See Section
40.)

CLEARANCE NOT OK:
Adjust clearance as
instructed in Section
40.

MX,159024030,16-19-16MAY95

MX,159024030,17-19-16MAY95

Electrical System Component Tests and Adjustments/PTO Clutch Adjustment Check

TM1590 (17MAY95)

240-25-7

316, 318 & 420 Lawn and Garden Tractors

020895

240

25

7

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