CYLINDER HEAD AS 3539607 - Caterpillar

Illustration 1 g00518953
(1) Magnet assembly (2) Body up or down switchThe body up or down switch (2) is located on a bracket on the rear frame. The magnet assembly (1) is connected to the dump body. When the dump body is raised, the body up or down switch (2) sends a signal to the Power Train Electronic Control Module (Power Train ECM). The signal indicates that the dump body is in the UP position. When the dump body is lowered the magnet assembly (1) will pass in front of the body up or down switch (2) and a signal will be sent to the Power Train ECM. This signal indicates that the dump body is DOWN. The adjustment of the body up or down switch (2) is very important. Refer to the Hydraulic System Testing and Adjusting, "Electronic Control (Body Down or Up Switch) - Adjust" for the proper adjustment procedure.The body up or down switch (2) is used to limit the top gear while the dump body is up. The Power Train ECM comes from the factory with the top gear value that is set to FIRST gear. The transmission will not shift past FIRST gear until the dump body is down. The top gear value is programmable by utilizing the Electronic Control Analyzer Programmer (ECAP) or the Electronic Technician (ET). The top gear value can be changed to SECOND gear, or THIRD gear.The signal from the body up or down switch (2) is used to provide warnings to the operator when the truck is moving with the dump body UP.