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Speed Level Seres - Servce & Parts Manual
January 2019
Electrical System – General
The electrical control system consists of lower controls located on the machine base and upper
controls located on the machine platform. Emergency lowering controls are also located on the
machine base.
Lower Controls
The lower controls will operate all functions except the steer, drive and
level functions.
Upper Controls
The upper controls will operate all functions including drive, steer, lift,
and lower. A momentary bi-directional rocker switch on the joystick
provides the steering function. The control system for operation of drive,
steer, lift, and lower are electric-over-hydraulic type. The drive system is
a proportional system controlled by position and direction of the upper
controls joystick.
Emergency Stop
There are two red Emergency Stop switches: One located on the upper
controls and one on the lower controls. Activation of either Emergency
Stop switch will immediately cut electrical power to all controls, thereby
stopping all machine functions. Press the switch to stop all electrical
power and turn the switch clockwise to reset.
ART_3093
GP400
Module
Diagnostic LED
Lower Controls
Terminal
Block
Module
When both Emergency Stop switches are “set”, the controls have electrical power and the machine
will operate.
ART_2506 R2
ART_2507 R2
Note:
Both switches must be set or the machine will not operate. The electric Emergency Lowering
switch will continue to function when the Emergency Stop switches are depressed.
Emergency Lowering
The machine utilizes a toggle switch to open the down valve on the lift cylinder, allowing hydraulic
fluid to return to the hydraulic reservoir at a controlled rate.
Electrical System – General
Secton 6 - Electrcal System
