OM3050 7/09 Operating Instructions - Section 30 Page 30-11 Lowering The Dump Body (When dumping on flat ground): Lowering The Dump Body (When dumping over a berm or into a crusher): It is very likely when dumping on flat ground that the dumped material will build up enough to prevent the body from lowering. In this case, the truck will have to be driven forward a short distance (just enough to clear the material) before the body can be lowered. 1. Move the hoist lever forward to the DOWN position. Release the lever to place the hoist control valve in the FLOAT position, which allows the body to return to the frame.
If dumped material builds up at the rear of the body and the body cannot be lowered, perform the following steps: 1. Move the directional control lever to FORWARD, release the brake lock, depress the override button, and drive just far enough forward for the body to clear the material. a. Move hoist lever back to the HOIST position to fully raise the dump body. Release the hoist lever so it returns to the HOLD position. 2. Stop, move the directional control lever to NEUTRAL, and apply the brake lock. 3. Move the hoist lever forward to the DOWN position. Release the lever to place the hoist control valve in the FLOAT position, which allows the body to return to the frame. NOTE:
Do not drive forward if the tail of body will not clear the crusher wall in the fully raised position. b. Move the directional control lever to FORWARD, release the brake lock, depress the Override button, and drive forward to clear the material. If dumped material builds up at the rear of the body and the body cannot be lowered, then perform the following steps: c. Stop, move the directional control lever to NEUTRAL, apply the brake lock and lower the body. a. Move the hoist lever back to the RAISE position to fully raise the dump body. Then release the hoist lever so it returns to the HOLD position. NOTE:
Failure to "hoist" the body after making an unsuccessful attempt at lowering the body may result in the dump body suddenly lowering after the truck has pulled ahead of the material that was previously preventing the body from lowering. b. Move the directional control lever to FORWARD, release the brake lock, depress the override button, and drive forward to clear the material. c. Stop, move the directional control lever to NEUTRAL, apply the brake lock, and lower the body. NOTE:
Failure to "hoist" the body after making an unsuccessful attempt at lowering the body may result in the dump body suddenly lowering after the truck has pulled ahead of the material that was previously preventing the body from lowering. The truck should not be moved with the dump body raised except in an emergency. Failure to lower the body before moving the truck may cause damage to the hoist cylinders, frame and/ or body hinge pins. 2. With the body returned to the frame, move the directional control lever to FORWARD, release the wheel brake lock, and leave the dump area carefully. The truck should not be moved with the dump body raised except in an emergency.
Failure to lower body before moving truck may cause damage to hoist cylinders, frame and/or body hinge pins. 4. With the body returned to frame, move the directional control lever to FORWARD, release the brake lock, and leave the dump area carefully.