PIN ASSEM. 8J8172 - Caterpillar

Illustration 6 g03687412The brake/fan combination valve (10) is located in the service center on the right side of the machine.Pressure reducing valve (10a) provides the pilot oil supply to the pilot steering solenoid and the primary steering solenoids in the steering control valve.Pressure reducing valve (10b) provides the pilot oil supply to the secondary steering solenoids in the steering control valve.Secondary Steering Components
Illustration 7 g03687148
(6) Secondary steering diverter valve (Pressure sensors)
(11) Secondary steering pump (with electric motor)
(13) Secondary steering pump relay
(14) Steering system pressure sensors Secondary Steering Pump Diverter Valve
Illustration 8 g03687389
(11) Secondary steering diverter valve (Pressure sensors) Secondary steering pump diverter valve (6) is mounted on the top of the CVT transmission, just above and behind the steering control valve.Secondary Steering Pump Start Relay
Illustration 9 g03687403Secondary steering pump start relay (13) is located behind the secondary steering pump on the left side of the machine. The relay is mounted on the inside of the rear frame, to the front of the rear axle.Secondary Steering Pump (with Electric Motor)
Illustration 10 g03687406Secondary steering pump (11) is mounted to the frame on the left side of the machine.Steering Pressure Sensors
Illustration 11 g03687600 Steering system pressure sensors (14) are mounted in the steering diverter valve.Steering Cylinders
Illustration 12 g03687410The steering cylinders are mounted on both sides of the machine. The head ends of the cylinders are attached to the rear frame. The rod ends are attached to the front frame.Steering Cylinder Position Sensors
Illustration 13 g03657305
(8) Steering cylinders
(15) Steering cylinder position sensor
(16) Sensor rod
(17) Magnet
(18) Sensor head Each steering cylinder is equipped with a position sensor located at the head end of the cylinder.Steering Pilot Oil Accumulator
Illustration 14 g03687601Steering pilot accumulator (9) is located in the service bay on the right side of the machine. The accumulator stores pilot supply oil during normal operation. The accumulator provides a temporary supply of pilot oil if a loss of pump flow occurs.Steering Control Valve and Components
Illustration 15 g03687620The steering control valve (7) is mounted to the transmission transfer gears near the articulation hitch. The steering control valve directs supply oil from the steering pump to the steering cylinders.Refer to Illustration 16 for the location of components of the steering control valve.
Illustration 16 g03687617
Steering control valve and components
(7) Steering control valve
(7a) Back-up relief valve
(7b) Crossover relief and makeup valve
(7c) Left secondary steering solenoid
(7d) Right secondary steering solenoid
(7e) Right primary steering solenoid
(7f) Steering pilot ON/OFF solenoid
(7g) Left primary steering solenoid
(7h) Crossover relief and makeup valve
(7j) Steering control spool position sensor