 | |
| Illustration 1 | g01071039 |
Schematic for the Suspension System (1) Hydraulic oil tank (2) Pump (3) Pressure gauge (4) Relief valve (5) Suspension control valve (6) Rear suspension cylinders (7) Front suspension cylinders | |
The suspension system allows the machine weight to be distributed evenly between the three front tires and the two rear tires. The suspension system consists of pump (2), relief valve (4), suspension control valve (5), rear suspension cylinders (6) and front suspension cylinders (7) .
The suspension system raises the machine and the suspension system lowers the machine. In order to raise the machine, start the engine and move the suspension switch to the RAISE position. To lower the machine, turn the key switch to ON and move the suspension switch to the LOWER position.
Pump (2) receives oil from hydraulic oil tank (1). From the pump, oil flows to suspension control valve (5). Oil will flow to suspension cylinders (6) and (7) or the oil will flow to the hydraulic oil tank. This depends on the position of the control switch for the suspension system.
The valve spool allows the oil to be directed through an orifice to the hydraulic oil tank when suspension control valve (4) is in the spring hold position.
 | |
| Illustration 2 | g01071041 |
(7) Front suspension cylinders | |
 | |
| Illustration 3 | g01071060 |
(6) Rear suspension cylinders | |
Front suspension cylinders (7) are located at the front of the machine under the front cover. Rear suspension cylinders (6) are located at the rear of the machine. The suspension cylinders allow the machine weight to be distributed evenly between the three front tires and the two rear tires.
 | |
| Illustration 4 | g01071100 |
(8) Control switch for the suspension system | |
The switch (8) that is used to control suspension is moved to the front position in order to lower the suspension. The middle position is used in order to hold the suspension in position. The rear position is used in order to raise the suspension.
 | |
| Illustration 5 | g01071101 |
(5) Suspension control valve | |
Suspension control valve (5) is located on the left side of the machine under the platform. The suspension control valve is a solenoid operated control valve that allows the suspension cylinders to activate.
Pump
 | |
| Illustration 6 | g01079032 |
Pump (9) Body (10) Drive gear (11) Rear bearing (12) Relief valve (13) Front bearing (14) Driven gear (15) Rear cover | |
The pump is a gear type pump that is driven by the steering and brake pump. The pump turns counterclockwise when you are looking at the rear of the pump.
Oil is drawn into the pump through the inlet port by drive gear (10) and driven gear (14). Oil circulates around the gears and the oil is then sent through the outlet port to the suspension control valve. Front bearings (13) and rear bearings (11) support the gears. The bearings prevent axial play. Relief valve (12) allows oil to flow in a loop and flow back to the inlet of the pump.
Suspension Control Valve
 | |
| Illustration 7 | g01079033 |
Suspension Control Valve (16) Line to suspension cylinders (17) Line from pump (18) Line back to hydraulic oil tank | |
Oil flows from the pump through line (17) to the suspension control valve. The oil returns through an orifice (18) to the hydraulic tank when the solenoid valves are not energized. When the valves are energized, oil flows through the top valve. The oil then supplies line (16) with oil in order to raise the suspension cylinders. To lower the machine, turn the key switch to ON and move the suspension switch to the LOWER position.