Operating Principle; Hydraulic Circuit; Raising The Lift; Travel (Machine Travel) - Haulotte COMPACT 8 Operating And Maintenance Instructions Manual

Operating and maintenance instructions - COMPACT 8, 8W, 10N, 10, 12
3.1 -

HYDRAULIC CIRCUIT

Caution!
Do not change the settings. If
there is a problem, call
PINGUELY-HAULOTTE
3.2 -

ELECTRICAL CIRCUIT

3 -

OPERATING PRINCIPLE

All the machine's movements are provided by the hydraulic energy supplied by a
gear pump driven by a variable-speed electric motor.
In the event of a breakdown, manual back-up action enables the scissors to be
lowered.

3.1.1 - Raising the lift

For raising the lift, the number of cylinders differs depending on whether an
COMPACT 8, 8W, 10N, 10 or 12 is being used.
The cylinders are controlled by on/off valves via a variable speed unit which gives
the progressiveness of the movement.
A single movement at a time is possible.

3.1.2 - Travel (machine travel)

Two travel speeds (high/low) are controlled by a switch.
High travel speed: The 2 motors are supplied in series, they receive the pump's
flow which goes into one motor and then the other.
Low travel speed: The 2 motors are supplied in parallel, each receives half of the
pump's flow.
The supply of pressure to these engines eliminates the brake's action. As soon
as the movement stops, the brake returns to its position under the action of
springs.

3.1.3 - Steering

Steering is impossible in the raising position.
Steering is controlled using the button on top of the manipulator.
The electrical energy used for the controls and starting is supplied by four 6-volt
batteries in series.
An on-board charger enables these batteries to be recharged overnight by
connection to a 16A domestic socket.

3.2.1 - Electronic variable speed unit

This is the central part for all the lift's operation. Its role is to control the speed of
movements and travel, adapting the motor-driven pump's rotation speed to suit a
given control order. The variable speed unit receives the signal from the control
manipulator, but also information on the nature of the movement to be carried out
and the state of the safety devices. In the event of a problem or breakdown, refer
to the various tables concerning operating faults (see Chapter 6, page 49).

3.2.2 - Battery charge monitor / Hour counter

This combines in a single unit the following functions :
• State of charge of the batteries
• Hour counter
• Resetting.
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