Drive & Steer Systems; Power System; Control System; Chassis - Snorkel A38E Operator's Manual

Section
1.1
DRIVE & STEER SYSTEMS
The A38E Work Platform is restricted to low speed
drive when the Platform is raised above the Boom
Rest Limit Switch. The Traction controller controls the
application of drive from the Joystick by means of two
Traction Motors, which are assembled to the drive
wheels via a Drive Reduction Gearbox.
Steering of the A38E Work Platform is controlled by
the P600, which controls the signals activating a
double acting cylinder. An Operator can Steer left or
right by depressing the Rocker Switches on top of the
Joystick, while activating the Interlock Switch.

POWER SYSTEM

The power system incorporates eight 6V batteries
driving the drive traction motors, or the 4kW (5.4HP)
electric motor which in turn drives the hydraulic
pump. The application of this hydraulic pressure is
performed by the Control System.

CONTROL SYSTEM

The machine is provided with fully proportional
controls by means of the interaction between a
P600, electronic motor controller and a proportional
joystick. The P600 and motor controller regulate the
drive motor/pump speed and hence the flow of oil
reaching the cylinders, the Worm Drive Unit or the
Drive Reduction Gearbox. It regulates the direction of
flow of the hydraulic oil via the solenoid valves located
on the manifold block, and it also monitors the opera-
tion of all switches on the machine via the machine
harness system.
The motor control units are located, in the left hand
chassis module. The manifold block is located on the
hydraulic tank. This is accessible by removing the
main cover.

CHASSIS

The chassis is a structural frame designed to support
all the components of the A38E Work Platform.
Page 4
Introduction & Specifications
A38E PURPOSE & LIMITATIONS
The purpose of the A38E work platform is to provide a
quickly deployable variable height work platform. It is
capable of lifting two people with work tools up to an
upper limit of 215 kg (ANSI 475 lbs) in total. The unit
will provide the ability to reach over obstacles but
must be used on firm level ground. See Specification
table on page 1-3.
The platform must only be used on firm level or
slightly uneven ground capable of supporting the
maximum load generated under the four wheels. Do
not use on soft or severely sloping ground.
!
DANGER
NOTE: It should be recognised that if the tilt
switch senses a degree of slope greater than
3º the elevating circuits will lockout and
sound a warning alarm. The Emergency
Override should then be used, to lower the
Elevating Assembly.
!
A38E Work Platform