ARM AS-LIFT 5233723 - Caterpillar

Illustration 1 g00418761
Steering System Schematic (1) Hydraulic oil tank. (2) Gear pump. (3) Relief valve. (4) Fan Motor. (5) Metering pump. (6) Steering cylinders. (7) Priority valve.The steering circuit is composed of four main components:
The hydraulic oil tank (1) .
Gear pump (2) .
Metering pump (5) .
The left and right steering cylinders (6) .The gear pump (2) delivers oil to the steering circuit, the fan motor (4), the leveling blade, and the charge circuit. Typically, the requirements of the oil flow for the steering circuit are significantly less than the available pump flow. The fan motor and the leveling blade system will slow down under intensive turning situations. The total oil flow to the charge system should be consistent at all times.The steering system is a load sensing system. Hydraulic oil for the steering circuit is supplied by the gear pump (2). The priority valve (7) gives priority to the steering circuit. The priority valve senses pressure in the steering circuit. Then, the priority valve directs flow to the metering pump (5). The amount of oil flow depends on rotation of the steering wheel by the operator. When the steering wheel is not being turned, the priority valve shifts and the oil flow is directed away from the steering circuit.
Illustration 2 g00614347
Left Side of Machine (1) Hydraulic oil tank.Hydraulic oil tank (1) is located to the rear of the engine. A strainer is located in the hydraulic oil tank. The hydraulic oil passes through the strainer and the oil goes to the suction side of the metering pump.
Illustration 3 g00422861
Left Side of Machine (2) Gear pumpThe gear pump (2) is located in the engine compartment. The gear pump is driven by the engine. Suction is from the hydraulic oil tank (1). The gear pump provides oil flow for the steering circuit, the charge circuit, the fan motor, and the leveling blade (if equipped).
Illustration 4 g00422863
Located Under the Operator's Platform (5) Steering metering pump. (8) Load sensing line.The oil flows from the gear pump (2) to metering pump (5). The metering pump is located at the bottom of the steering column under the console. The metering pump is load sensing. The load sensing line (8) provides the pilot signal to the gear pump.
Illustration 5 g00424184
Location of Metering Pump (6) Steering cylinder.When the steering wheel is turned, two double acting steering cylinders (6) receive oil from the metering pump (5) in order for the compactor to make the desired turn. When the steering wheel is not being turned, a small amount of oil is required in order to provide a dynamic signal for fast steering response. With the steering control valve spool in the spring centered position, oil is blocked to the steer cylinders.
Illustration 6 g00614349
Location of Fan Motor (4) Fan motor.The fan motor is always operating, when the machine is on. The gear pump delivers oil to the priority valve and the priority valve directs oil to the fan motor. The fan motor is equipped with a relief valve. The return oil flows to the charge