Table of Contents
Advertisement
Synchro Shuttle Gearbox
2/4 Wheel Drive Clutch Operation
- Spring ON/Pressure OFF Type
4 Wheel Drive Operation
This clutch is of the 'Spring-ON (4WD)/Pressure-
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 de-energised. With the solenoid
A1 de-energised, the valve spool moves under the
force of the spring A2. The oil supply to the piston
C is blocked, (shown at port 3). At the same time oil
vents from the back of piston C to the sump via
ports 1 and 2.
www.WorkshopManuals.co.uk
Because there is no pressure behind piston C, the
clutch friction/counter plates of clutch pack B are
forced together by disc springs D, thus driving the
output yoke E.
Purchased from www.WorkshopManuals.co.uk
A406220
Advertisement
Table of Contents
