GEAR-DRIVE 1204483 - Caterpillar

Illustration 1 g01928655
Location of the hoist control position sensor
The position sensor for the hoist control is located in the center operator's console. The hoist control position sensor is a Pulse Width Modulation position sensor. The hoist control postion sensor sends duty cycle signals to the Power Train Electronic Control Module (Power Train ECM).The Power Train ECM uses these signals to energize the appropriate hoist proportioning solenoid on the hoist control valve. These hoist propertioning solenoids will move the spool in the hoist control valve. This will cause oil to be sent to the hoist cylinders in order to move the dump body.The signal from the hoist control position sensor is also used to neutralize the transmission. The Power Train ECM will allow only a forward speed position or the NEUTRAL position when the hoist control position sensor is in the RAISE position. The Power Train ECM will not allow a shift to the REVERSE position until the hoist control position sensor has been moved from the RAISE position and the transmission shift lever is in the NEUTRAL position.Note: If the machine is in REVERSE and the hoist position sensor is in the RAISE position the Power Train ECM will shift the transmission to NEUTRAL. The machine will remain in NEUTRAL until the hoist control is moved into the HOLD or the FLOAT position and the transmission control has been cycled through NEUTRAL.