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37 - 2

Section D Controls

9803/3280

Section D

37 - 2

Issue 1

Precision Control (Servo)

YES

Does system function if the 'mode'

switch is operated?

START

Is the supply valve solenoid coil

faulty?

Is the relevant electrical fuse intact?

Is the wiring to the supply valve

solenoid coil intact?

Renew pilot supply valve solenoid

valve stem.

Renew coil.

Repair as applicable.

See Electrical Connections.

Check seat mounted micro switch

function and condition of associated

wiring for damage. Repair or renew

as applicable.

Inspect and test all relevant wiring

for damage and short circuits.

Repair as applicable. Renew the

fuse.

A402360

See Electrical Switches, Seat

Mounted Microswitch - Adjustment.

Fault Finding

Chart A - No Servo Controls (system fails to operate)

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jcb 4CX Service Manual

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