Transmission
9803/3280 Issue 2*
27-1 27-1
Systems Description
Section F Section F
Pressurised oil is directed to piston C via ports 3
and 2. The piston moves, against spring D, to press
the friction/counter plates of clutch pack B
together, thus driving the output yoke E.
Synchro Shuttle Gearbox
2/4 Wheel Drive Clutch Operation
- Pressure ON/Spring OFF Type
4 Wheel Drive Operation
This clutch is of the 'Pressure-ON (4WD)/Spring-
OFF (2WD)' type. The clutch is engaged and
disengaged by introducing or dumping pressurised
oil behind piston C via a solenoid valve A. The
solenoid valve is operated by a switch in the cab.
When the switch is in the 4 wheel drive position,
solenoid valve A is energised. The energised
solenoid A1 causes the valve spool to move and
form a connection between ports 3 and 2.
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