PLATE & FILM GP 1400123 - Caterpillar

Illustration 1 g03419809
Under Operator Platform on Right Side of Machine
(1) Shift valve Shift valve (1) is located on the right side of the machine, under the operator platform. When the propel mode is set to high, the machine ECM number-one generates a digital signal to energize the solenoid of shift valve (1). Shift valve (1) controls the oil flow used to shift the front propel motor. When the shift solenoid is not energized, the propel motors operate in the low-speed range. When the shift solenoid is energized, the front propel motor operates in the high-speed range.Note: With propel mode set to high, the front propel motor operates in high speed mode and the rear propel motor operates in low speed mode. This combination of operating modes provides better gradability and braking performance than by operating both drum motors in the high speed mode.