Komatsu — DUMPING

Operation - Section 3 OM3043 Page 30-8 Operating Instructions To Lower Body: (When dumping over a berm or into a crusher): To Lower Body (When dumping on flat ground): 8. Move hoist lever forward to DOWN position and release. Releasing the lever places hoist control valve in the FLOAT position allowing the body to return to frame. 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. NOTE:

If dumped material builds up at the rear of the body and the body cannot be lowered, perform steps a & b below: a. Shift Selector Switch to FORWARD, release Brake Lock, depress Override button and drive just far enough forward for body to clear material. Stop, shift Selector Switch to NEUTRAL, apply Brake Lock. a. Move hoist lever back to the HOIST position to fully raise the dump body. Then release the hoist lever so it returns to the HOLD posi- tion. b. Move hoist lever forward to DOWN position and release. Releasing the lever places hoist control valve in the FLOAT position allowing the body to return to frame. NOTE:

DO NOT drive forward if the tail of body will not clear the crusher wall in the fully raised position. b. Shift Selector Switch to FORWARD, release Brake Lock, depress Override button and drive forward to clear the material. Stop, shift Selector Switch to NEUTRAL, apply Brake Lock and lower body again. NOTE: If dumped material builds up at the rear of the body and the body cannot be lowered, then perform steps c and d below: c. Move hoist lever back to the HOIST position to fully raise the dump body. Then release the hoist lever so it returns to the HOLD posi- tion. 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. d. Shift Selector Switch to FORWARD, release Brake Lock, depress Override button and drive forward to clear the material. Stop, shift Selector Switch to NEUTRAL, apply Brake Lock and lower body again. 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 is not to be moved with the dump body raised except for emergency moves only. Failure to lower body before moving truck may cause damage to hoist cylinders, frame and/or body hinge pins. CAUTION! The truck is not to be moved with the dump body raised except for emer- gency moves only. Failure to lower body before moving truck may cause dam- age to hoist cylinders, frame and/or body hinge pins. 9. With body returned to frame, move Selector Switch to FORWARD, release Brake Lock, and leave dump area carefully.