VALVE BODY 2I8773 - Caterpillar

Pilot Pressure
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(1) Pilot Pressure test port. Pilot pressure is taken from the port located on the pilot gear pump which is mounted to the main hydraulic pump. Access to the main hydraulic pump is made on the right side of the machine from under the upper frame group.Pump Pressure
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(2) Front Pump test port.
(3) Rear Pump test port. Swing Drive Pressure
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(4) Swing Right test port.
(5) Swing Left test port. The swing pressure ports are located on top of the swing drive. The swing drive can be accessed from the operator platform by removing the panel above the swing drive.Hydraulic Oil Sampling
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(6) SOS test port. The hydraulic oil sampling port is located inside the engine compartment access door of the operator platform on the thermal bypass valve. The port is marked GPT.Return Pressure
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(7) Return Pressure port. The return pressure port is located inside the engine compartment access door of the operator platform on the thermal bypass valve. This port is the same port used for oil sampling.Oil Cooler Inlet Pressure
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(8) Oil Cooler Inlet Pressure test port. The oil cooler inlet pressure port is also located inside the engine compartment access door of the operator platform on the thermal bypass valve. The port is marked GPR.