TUBE 7S8864 - Caterpillar

Hydraulic Filters
Illustration 2 g01233609
Left Side of Machine (4) Pressure switch (5) Pressure tap (6) Charge filter (right) (7) Pressure tap (8) Pressure switch (9) Charge filter (left)Right charge filter (6) and left charge filter (9) are located in the pump compartment, on the left side of the machine. The charge pumps direct oil through the charge filters. The base of each filter contains pressure switch (4) and (8). The Caterpillar Monitoring System uses the input from the pressure switches in order to operate the hydraulic filter plugged indicator.The base of each charge filter also contains pressure tap (5) and (7). Charge pressure in the right and left propel systems can be measured at the pressure taps in the filter bases. When the machine is not moving, the charge pressure should be 2760 170 kPa (400 25 psi).Oil Cooler Bypass Manifold
Illustration 3 g01233610
Under the Operator Platform, Right Side of the Machine (10) Pressure Tap (11) Oil cooler bypass manifoldCase drain oil from the propel, vibratory, auger, and conveyor hydraulic systems is sent to oil cooler bypass manifold (11). The manifold is located under the operator platform, on the right side of the machine.The ports of oil cooler bypass manifold (11) are marked for identification. Oil from the left propel motor case drain is directed into port "A" of the manifold. Oil from the right propel motor case drain is directed into port "D". Oil from the left propel pump case drain is directed into port "G".Note: Oil from the right propel pump case drain is combined with case drain oil from the right and left feeder pumps. This combined oil is then sent directly to the hydraulic tank.Port "H" of oil cooler bypass manifold (11) is equipped with pressure tap (10). Oil cooler inlet pressure can be measured at this tap.The combined return oil from all of the hydraulic systems is sent out port "TC" to the oil cooler. The oil cooler is part of the cooling package (not shown, located to the right of the engine).Oil cooler bypass manifold (11) is equipped with a 210 kPa (30 psi) check valve. When the pressure differential across the oil cooler is greater than the value of the check valve, the valve opens, and then oil is returned directly to the hydraulic tank.Brake and Shift Solenoid
Illustration 4 g01233612
Under the Operator Platform (12) Brake solenoid (13) Shift SolenoidBrake solenoid (12) and shift solenoid (13) are located on the auxiliary manifold. The auxiliary manifold is located under the operator platform.