Owner's manual

Model 644E Rev. 8/03

Operation

Auxiliary Hydraulic Control

The auxiliary hydraulic control is used to control the functions of an optional

attachment that is mounted to the vehicle and requires a hydraulic supply for

operation. Some of the optional attachments that require auxiliary hydraulics are:

Side Tilt Carriage, Swing Carriage, 3 ft Truss Boom w/Winch, 10 ft Truss Boom

w/Winch, Single Fork Positioning Carriage, Dual Fork Positioning Carriage and

Auger.

Refer to “Auxiliary Hydraulic Pressure Release Switch” on page 68 (if so equipped)

when connecting or disconnecting any attachment that requires a hydraulic oil

supply. If your vehicle is not equipped with the “Auxiliary Hydraulic Pressure Release

Switch” the pressure is automatically released, by internal passages, within the main

control valve.

The button (1) to activate the auxiliary hydraulics is located on the top of the front

joystick (2). Pressing the button with your thumb activates the auxiliary hydraulic

function. The button must be held down while moving the joystick to the right or left.

IMPORTANT! Releasing the button while moving the joystick to the left or right will

change the function of the joystick back to the transfer carriage extend/retract mode

of operation.

OU0450