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Section F
32 - 1
Powershift Gearbox - 4 Speed
Introduction
This section explains how the electrical system works when
the following gearbox functions are operated:
1st, 2nd, 3rd and 4th gears forward
Neutral
1st, 2nd, 3rd and 4th gears reverse
Transmission dump
Park brake switch
The 4-speed powershift gearbox is controlled using
conventional relays. The relays at A are operated via the
column mounted gear and forward/reverse lever B. The
transmission dump switch C or park brake switch D also
operate a relay at A. The contacts inside the relays energise
the gearbox mounted solenoid control valves E.
Diode 'gates' F are also used as logic switches.
To access the relays and connectors it is necessary to
remove the front/steering console panel X and side panels
Y, refer to Section B for the correct procedure.
1
2
3
4
E
9803/3280
Transmission
Electrical Connections
B
F
N
R
X
Purchased from www.WorkshopManuals.co.uk
F
C
Y
Y
Section F
32 - 1
A
D
A404800
Issue 1
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