SEAT GP 2671609 - Caterpillar

Illustration 1 g01273173
(1) Magnet assembly
(2) Body down or up switch Body down or up switch (2) is located on a bracket on the rear frame. Magnet assembly (1) is connected to the truck body. When the truck body is raised, body down or up switch (2) sends a signal to the Power Train Electronic Control Module (Power Train ECM). The signal indicates that the truck body is in the UP position. When the truck body is lowered the magnet assembly (1) will pass in front of body down or up switch (2). Then a signal will be sent to the Power Train ECM. This signal indicates that the truck body is DOWN. This particular type of body down or up switch does not require an adjustment procedure.Body down or up switch (2) is used to limit the top gear while the truck 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 truck 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 body down or up switch (2) is also used to control the SNUB position of the hoist control valve. The Power Train ECM will signal the hoist proportioning solenoids to move the hoist control valve to the SNUB position when the truck body that is being lowered nears the frame. Moving to the SNUB position reduces the speed of the truck body to prevent the truck body from contacting the frame with too much force.The signal from body down or up switch (2) warns to the operator when the truck is moving with the truck body in the UP.