Upright AB38 Service & Parts Manual Download

Page: 26 / 133

Operation

Section

3-8

AB38 Work Platform

CAUTION

To “

STEER

” the AB38 activate the Interlock

Switch while pushing the Steering Switch

LEFT

RIGHT

to turn the wheels. Observe the tyres

while manoeuvring to ensure proper direction.

NOTE:

Steering is not self-centring. The wheels must be
returned to the straight ahead position by operating
the Steering Switch.

TRAVEL WITH WORK PLATFORM
ELEVATED

Travel with platform elevated

ONLY

on firm

and level surfaces. Platform motion is
exaggerated while travelling on uneven
surfaces.

NOTE:

The Work Platform will travel at reduced speed when
in the elevated position.

Check that the route is clear of persons,
obstructions, pot holes or ledges and is capable
of supporting the wheel loads. Also, check that
the clearances above, below and to the side of
the Work Platform are sufficient.

Depress the Drive function button.

Grasp the Joystick so that the Interlock Switch
is depressed (releasing this Interlock Switch will
cut power to the Joystick). Slowly push or pull
the Joystick to

FORWARD

REVERSE

travel in the desired direction. The farther you
push or pull the Joystick from the center the
faster the machine will travel.

If the machine comes to a halt and the Tilt
Alarm sounds, immediately lower the
Platform and move the machine to a level
location before re-elevating the Platform.

PLATFORM LEVELLING

NOTE:

The Levelling function will only work when the Boom
Rest Limit Switch has been activated i.e. when the
Booms are stowed.

The platform can be levelled from the Upper controls
using the levelling function, depress and hold the
levelling button on the upper control box (see fig3-1)
while moving the joystick forward or back to level the
platform. The switch should be operated in short
bursts to level the platform

slowly.

EMERGENCY SITUATIONS &
EMERGENCY OVERRIDE

In any emergency situation, the first action to be taken
should be to hit the red “Emergency Stop”
button for instant cutout of all functions. It will then be
required to twist the button clockwise, this releases
the cutout and the machine can be operated again.
If the audible Tilt warning alarm sounds, normal
control functions will cease to operate. This will be
due to the following problem ;

the machine is out of level i.e. Tilt Sensor has
been activated.

In this situation the only machine functions that will
operate are descent functions, descend to the ground
in a controlled manner and cycle the power (push and
release the emergency stop) to restore all functions,
move the machine to a level surface and continue
with normal operation.

Note that during emergency operation, controls
will operate at a fixed, slow speed and will not
allow the raising or extending of the Booms.
The Booms can be lowered or retracted.

Emergency Lowering

When operating this function, extreme care
must be taken to ensure that the person
carrying out the task does not become
trapped by the structure.

DO NOT

climb

down the Elevating Assembly to operate
these valves.

Should the machine become inoperable when
elevated, request a person on the ground to lower the
platform using the emergency lowering valves.
These are red knobs (push type) mounted at the
base of the 2 Main Hydraulic Lift Cylinders (See
Figure 3-2).
Operate the lower boom first by pushing slowly.
The boom will descend slowly. The speed of descent
is controlled by retaining pressure on the valve -

3.4

CAUTION

WARNING