Multiquip AR13HAR Is directed to the steering valve, Vibration and Steering, Rubber Scrapper Mat

CAUTION - Freewheel EngagementValve

The freewheel engagement valve (towing) is only for emergency use. DO NOT move roller over 2 MPH or long

The vibration circuit is controlled by an electric control valve located on the valve block (manifold).This valve is controlled by the “ON/OFF” pushbutton switch mounted on top of the travel lever.

distances as hydraulic system component failure could result.

ALLEN

WRENCH

OPEN

High-pressure oil is supplied by the pump to the valve block (port P) and is directed to the electric control valve. When the pushbutton switch is in the “OFF” position, this valve is open allowing oil to go to the steering valve, without driving the vibration motor.

PUSH

TO

START

CLOSED

(ON)

CLOSED

TOW

FREEWHEEL

ENGAGEMENT

VALVE

Figure 27. Freewheel Engagement Valve

Drum Drive

The drum drive circuit is a parallel, closed loop system (Figures 38 and 39) consisting of a hydrostatic pump, two relief valves, a freewheel engagement valve, front and rear drum drive motors.

The hydrostatic pump is manually controlled by a cable connected to the forward/reverse shift lever located on the right side of the operator seat. When the shift lever is placed in forward, high-pressure oil is supplied by the hydrostatic pump to the valve block (port A). The valve block (manifold) directs this high- pressure oil to the front and rear drum drive motors. Return oil from the motors is returned to the valve block (port B) and is returned to the suction side of the hydrostatic pump.

When shifted into reverse, the high-pressure and suction ports on the hydrostatic pump are reversed. Oil flow is then in the opposite direction of forward (port B becomes high-pressure and port A becomes suction)

Vibration and Steering

The vibration and steering system is an open loop circuit operated by a gear type pump. Separate relief valves control each circuit.This system consist of the gear pump, relief valves, electric vibration control valve, vibration drive motor, steering valve, and steering cylinder.

Steering is controlled by a steering valve and cylinder (Figures 29 and 30).The steering wheel is direct coupled to the steering valve controling the oil flow to the cylinder. Oil supplied from the vibration circuit is directed to port 3 which connects to port P of the steering valve. When steering is not being used, oil passes out of portT of the valve block and returns to the hydraulic tank. When the steering wheel is operated, the steering valve closes and oil is directed to ports L or R to extend or retract the steering cylinder.

Rubber Scrapper Mat

Rubber scraper mats have been provided for the cleaning of the front and rear drums. Adjust the scrapers mats as close as possible to the drums, using the slotted holes (Figure 28) provided. Replace these rubber mats when they become badly worn.