CORE AS 2071742 - Caterpillar

Right Turn (Counterrotate Turn)
Illustration 7 g06267883
Right turn (counterrotate turn)
(1) Oil cooler
(6) Check valve (if equipped)
(7) Tank
(8) Right charge pump
(9) Charge relief valve
(10) Breather assembly
(11) Drain
(12) Temperature sensor
(14) Right pump filter and bypass switch
(15) Hystat crossover relief valve
(16) Servo valve (right hystat piston pump)
(17) Right hystat piston pump
(18) Engine
(19) Left hystat motor controller
(20) Left hystat piston motor
(21) Brake
(22) Speed sensor
(24) Right hystat piston motor
(25) Right hystat motor controller
(26) Left hystat piston pump
(27) Servo valve (left hystat piston pump)
(28) Accumulator
(29) Left pump filter and bypass switch
(30) Cooler bypass
(31) Fan pump
(32) Left charge pump
(33) Return manifold
(34) Transmission NEUTRAL interlock solenoid
(35) Parking brake solenoid
(36) Servo valve (left hystat piston motor)
(37) Servo valve (right hystat piston motor)
(R3) Test port for the case pressure
(R4) Test port for the parking brake pressure
(R6) "mB" pressure sensor for the left hystat pump
(R7) "mA" pressure sensor for the right hystat pump
(R8) "mA" pressure sensor for the left hystat pump
(R9) "mB" pressure sensor for the right hystat pumpPedal Steering Configuration
The ECM interprets the two signals of the transmission control lever and the ECM determines that the lever is in the FORWARD position. The ECM interprets the two signals of the steering pedals and the ECM determines that pedals are in the COUNTERROTATE RIGHT position. As a result, the ECM sends signals to the piston pumps and to the piston motors.The ECM sends the following signals to left hystat piston motor (20) and to right hystat piston motor (24).
A PWM signal is sent from pin 65 of the J1 connector through wire C959-BR(Brown)to the solenoid of servo valve (36) for left hystat piston motor (20).
A PWM signal is sent from pin 66 of the J1 connector through wire C958-BU(Blue)to the solenoid of servo valve (37) for right hystat piston motor (24).The ECM sends the following signals to servo valve (27) of left hystat piston pump (26).
No PWM signal was sent from pin 48 of the J1 connector through wire 843-WH(White)to the forward solenoid of servo valve (27).
A PWM signal was sent from pin 49 of the J1 connector through wire 844-GN(Green)to the reverse solenoid of servo valve (27).The ECM sends the following signals to