794 AC Off-Highway Truck Systems Caterpillar


Location of Components (Hydraulic System)

Usage:

794 AC MN5

Hydraulic Tank



Illustration 1g03668534

The hydraulic tank is on the outside of the left-hand frame.

Reference: Refer to Systems Operation, "Hydraulic Tank" for additional information.

Breather (Hydraulic Tank)



Illustration 2g03671887

The hydraulic tank breather is on the upper portion of the hydraulic tank.

Reference: Refer to Systems Operation, "Hydraulic Tank" for additional information.

Hydraulic Tank Low Level and Temperature Sensor



Illustration 3g03671920
(1) Hydraulic low-level sensor
(2) Hydraulic temperature sensor

Hydraulic low-level sensor (1) and hydraulic temperature sensor (2) are on the front of the hydraulic tank behind the cover.

Reference: Refer to Systems Operation, "Electronic Control (Hydraulic System)" for additional information.

Service Center Enclosure



Illustration 4g03671928
View of the service center enclosure hydraulic gauges
(1) Steering valve
(2) Steering accumulator
(3) Hoist valve
(4) Front brake
(5) Brake control pilot valve
(6) Brake supply accumulator
(7) Park Brake
(8) Rear brake

The service center enclosure is located behind the cab.

Reference: Refer to Systems Operation, "Brake System" for additional information.

Hoist Control



Illustration 5g03474797

The hoist control lever is located in the cab, mounted to the left side of the operators seat.

Reference: Refer to Systems Operation, "Hoist Control" for additional information.

Hoist Control (Position Sensor)



Illustration 6g03475157

The hoist control position sensor is at the base of the hoist control lever on the left side of the operators seat.

Reference: Refer to Systems Operation, "Electronic Control (Hydraulic System)" for additional information.

Body Position Sensor



Illustration 7g06424703

The body position sensor is located at the rear of the machine on the inside of the left-hand frame rail.

Reference: Refer to Systems Operation, "Position Sensor (Truck Body)" for additional information.

Gear pump (Hoist)



Illustration 8g03671946

The tandem section gear type hoist pump is mounted to the pump drive. The pump drive is driven by a drive link from the generator.

Reference: Refer to Systems Operation, "Gear Pump (Hoist)" for additional information.

Control Valve (Hoist)



Illustration 9g03671970

The hoist control valve is mounted on a platform on the front of the rear support assembly.

Reference: Refer to Systems Operation, "Control Valve (Hoist)" for additional information.

Control Valve Solenoid (Snub, Float, and Lower)



Illustration 10g06329212

The snub, float, and lower solenoid is on the front of the control valve.

Reference: Refer to Systems Operation, "Control Valve (Hoist)" and Systems Operation, "Electronic Control (Hydraulic System)"for additional information.

Control Valve Solenoid (Raise)



Illustration 11g06329219

The raise solenoid is on the rear of the control valve.

Reference: Refer to Systems Operation, "Control Valve (Hoist)" and Systems Operation, "Electronic Control (Hydraulic System)"for additional information.

Dual Stage Relief Valve



Illustration 12g06329288

The dual stage relief valve is on the top side of the control valve.

Reference: Refer to Systems Operation, "Control Valve (Hoist)" for additional information.

Brake Cooling Relief Valve



Illustration 13g06329302

The cooling relief valve is located of the right-hand side of the control valve toward the front.

Reference: Refer to Systems Operation, "Control Valve (Hoist)" for additional information.

Hoist Cylinders



Illustration 14g03672026

The hoist cylinders are located in the center of the frame on the outside of the frame rails.

Reference: Refer to Systems Operation, "Hoist Cylinders" for additional information.

Oil Filters (Hoist)



Illustration 15g03672063

The hoist filters are located to the right of the hoist control valve in front of the rear axle.

Reference: Refer to Systems Operation, "Oil Filters (Hoist)" for additional information.

Pressure Reducing Valve



Illustration 16g06329306

The pressure reducing valve is mounted on rear the hoist control valve.

Reference: Refer to Systems Operation, "Pressure Reducing Valve" for additional information.

Hydraulic Oil Cooler



Illustration 17g03672223

The hydraulic oil cooler is mounted to the right-hand side of the engine.

Reference: Refer to Systems Operation, "Hydraulic Oil Cooler" for additional information.

Gear Pump (Pump Drive Lubrication)



Illustration 18g03733979

The gear pump is a two section gear pump that is mounted to the rear of the hydraulic fan piston pump. The hydraulic fan piston pump is mounted to the pump drive. The pump drive is driven by a drive link from the generator.

Reference: Refer to Systems Operation, "Pump Drive Lubrication System" for additional information.

Pump Drive



Illustration 19g03733984

The pump drive is mounted to a plate assembly in front of the cross tube and is connected to the rear of the generator. The pump drive is driven by a drive link from the generator.

Reference: Refer to Systems Operation, "Pump Drive Lubrication System" for additional information.

Oil Filter (Pump Drive Lubrication)



Illustration 20g06333182

The pump drive lubrication oil filter is mounted on the left-hand frame rail.

Reference: Refer to Systems Operation, "Pump Drive Lubrication System" for additional information.

Breather (Pump Drive Lubrication)



Illustration 21g06333225

The breather for the pump drive lubrication system is mounted to the left-hand frame rail.

Reference: Refer to Systems Operation, "Pump Drive Lubrication System" for additional information.

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