Hydraulic system – 6000

Initial forks

When the forks lifting control is actuated, the pump contactor closes and the pump motor starts operating. At the same time, the Y69 valve opens and oil flows through Y69 to the lift cylinder.

If the lifting movement is interrupted, Y69 closes gently.

Initial forks lowering

When the initial fork lowering control (pushbutton or foot pedal) is actuated, the magnetic valves Y10 and Y69 opens completely to allow the oil in the pressure line to return to the oil reservoir.

If the lowering movement is interrupted, first Y69 closes slowly and then Y10 closes. To ensure Y69 is completely closed before Y10 closes, Y10 receives a retarded holding voltage from the truck's logic card.

Operating pressure

The operating pressure at rated load is: 185 bar.

Relief valve

Relief valve opening pressure: 200 bar.

Check valve for the cabin / forks cylinders (3)

In case of a ruptured hose, the check valve ensures that the lowering speed does not exceed 0.6 m/sec. It is designed as a ball washer and is installed in the hose coupling.

Following dismantling and when later reconnecting the hydraulic hose to the cylinder, make sure the ball washer is in place.

Pressure sensors, B10/B11

The purpose of the pressure sensor is to provide the truck controller with a pulse signal to reduce the speed when carrying loads that exceed 500 kg.