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| Illustration 1 | g01193409 |
(1) Rear steering left solenoid (2) Rear steering right solenoid (3) Rear door open solenoid (4) Rear door close solenoid (5) Rotor raise solenoid (6) Rotor lower solenoid (7) Port "T" (8) Port "P" (9) Port "TP1" | |
The rear auxiliary manifold is located on the left side of the hydraulic tank. The auxiliary pump provides oil to port "P" (8) of the rear auxiliary manifold. Port "T" (7) directs return oil to the hydraulic tank.
Rear steering left solenoid (1) and rear steering right solenoid (2) are located on the top face of the rear auxiliary manifold.
Rear door open solenoid (3) and rear door closed solenoid (4) are also located on the top face of the rear auxiliary manifold. These solenoids are controlled by the rear door switch.
Rotor raise solenoid (5) and rotor lower solenoid (6) are located on the top face of the rear auxiliary manifold. These solenoids are controlled by the machine ECM. The rotor raise and the rotor lower hydraulic circuit contains two counterbalance valves. One counterbalance valve is in the line to the rod ends of the rotor depth control cylinders. One counterbalance valve is in the line to the head ends of the rotor depth control cylinders. The counterbalance valves ensure that the rotor depth control cylinders do not move unless pressurized oil is directed into one end of the cylinders.
The front face of the auxiliary manifold contains a pressure tap in port "TP1" (9). The pressure tap is used to measure pump supply pressure.