June 2004 - 9507EI/5
1-5
2 to 9 Tonne Dumper Instruction Manual
Introduction
The range of 2 to 9 tonne payload site dumpers have been
designed to provide the greatest degree of component
standardisation possible, thus providing the user with simplified
servicing requirements. It is for this reason that this handbook
covers the entire range of dumpers, and users of one, or all of the
models will benefit from having a single source of information
for all the models in their fleet.
It must be noted, that the 4000 model included in this manual
is NOT the Hydrostatic Drive but the mechanical drive model
General Description
Skips
- Standard and Swing
All models in the range are 4 wheel drive dumpers having a load
carrying skip located over the front axle, and ahead of the driver.
The 2, 3, 4 and 6 tonne models are available with a turntable skip
which rotates through 180º. The skip is mounted on a ball
bearing slew ring and is rotated by double hydraulic rams.
Engines
Engines on all machines are multi-cylinder diesel which transmit
power to the wheels by means of mechanical gearboxes and
axles.
All machines are fitted with electric starting of the engine. A
separate key operated start switch is provided and is located
adjacent to the steering wheel. A battery isolator switch is
provided in the engine compartment.
Chassis
The chassis of the dumpers is of the two part articulating type
having a centre pivot joint which articulates in both vertical, and
horizontal planes.
Steering
Steering of the dumper is by an 'Orbitrol' hydrostatic steering
unit, powering a single ram connecting the front and rear chassis
units.
Transmission
The transmission of the dumpers comprise of heavy duty
constant mesh gearboxes with three forward and one reverse
gear on all models up to 3 tonne capacity. The 4, 5, 6, 7 and 9
tonne models have torque converter four speed shuttle gearboxes.
Braking
The vehicle braking is provided by means of totally enclosed oil
immersed brakes located within the drive axles. These brakes
are self adjusting sintered multi-plate discs which are
hydraulically operated by means of single or tandem master
cylinders depending upon whether the dumper has 1 or 2 axle
braking.
In the case of two axle braking the tandem master cylinder
provides the feature of totally independent front and rear systems.
In the event of failure of one system, braking will still be
available on the alternative axle.
Electric System
All models are available with full lighting to comply with
British road traffic regulations. All models use a belt driven
alternator to charge the battery.
Machine Data
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