John Deere 318 User Manual

Page 337

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background image

4m

20-Amp Power
Circuit Test at TDC
Module

Turn key switch to RUN
position.

M37290 -UN-25JAN90

Check for voltage at
pink and purple leads
and single purple lead
(A) at TDC 8-pin
connector.

VOLTAGE ONE LEAD:
Repair connector.

VOLTAGE BOTH
LEADS: GO TO

4n

NO VOLTAGE: GO TO

1f

4n

TDC Ground
Check at 2-Pin
Connector

M36649 -UN-28APR95

Turn key switch to OFF
position.

Verify good ground at
TDC 2-pin connector
(A).

GOOD GROUND:
Replace TDC Module.

NO OR POOR
GROUND: Clean
connections and restore
good ground, then GO
TO

Å

, Group 05.

Ö

BRAKE NEUTRAL
START SAFETY
SWITCH TEST—
For Machines:
316 (SN 596121— )
318 (SN 600305— )
420 (SN 595881— )

PTO switch OFF.

Hydrostatic lever in
STOP position.

M77933 -UN-17JAN95

M77931 -UN-17JAN95

Release brake pedal
completely.

Turn key switch to RUN
position.

Check for voltage at
purple lead (A).

VOLTAGE: Check for
proper switch
engagement. IF OK;
replace switch, then
GO TO

Ö

, Group 05.

NOTE: Brake switch
engagement can be
adjusted by slightly
bending the
engagement pad that’s
welded on the brake
linkage shaft. Check for
proper brake
adjustment before
bending the tab. (See
Section 60, Group 10.)

MX,159024025,69-19-16MAY95

MX,159024025,70-19-16MAY95

MX,159024025,71-19-16MAY95

Electrical System Diagnosis/Brake Neutral Start Safety Switch Test

TM1590 (17MAY95)

240-20-25

316, 318 & 420 Lawn and Garden Tractors

020895

240

20

25

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This manual is related to the following products:

316, 420