Operating Instructions - Section 30 03/13 OM3054 Page 30-14 Raising the Dump Body Lowering The Dump Body 7. After the load clears the body, lower the body to the frame by moving the hoist control lever for- ward to the DOWN position. The dump body will start to move downward. When dumping very large rocks or sticky mate- rial, the material may exit the body too fast. This may cause a violent jolt to the dump body and cause possible injury to the operator. Damage to the hoist cylinders, frame, and the dump body hinge pins may also result. If it is necessary to dump this kind of material, refer to the caution in the following procedure. 8.
Releasing the lever during the downstroke will return the lever to the FLOAT position. The body will then float down under its own weight. If dumped material builds up at the body tailgate and the body cannot be lowered, shift the trans- mission shift lever to DRIVE. Release the brake lock switch, and drive forward to clear the mate- rial. Stop, and shift the transmission shift lever to NEUTRAL. Apply the brake lock switch and lower the dump body. See the note below. 4. Move hoist control lever (1, Figure 30-5) to POWER UP position (4) and release the lever. Releasing the hoist lever anywhere in the lever stroke when raising will place the dump body in HOLD at that position. 5.
Raise engine rpm to accelerate the hoist speed. DO NOT move the truck with the dump body raised except in the event of an emergency. Failure to lower the dump body before moving the truck may cause damage to the hoist cylinders, frame and body hinge pins. Refer to the following caution note. When the body is near the maximum angle, reduce engine rpm in order to reduce the shock load to the hydraulic system and hoist cylinders. NOTE: When traveling, always place the hoist control lever in the FLOAT position, regardless of whether or not the truck is loaded. If dumping very large rocks or sticky material as described in the warning above, slowly acceler- ate engine rpm and raise the dump body.
When the material starts to move, release the hoist lever to the HOLD position. If the material does not continue out of the dump body, repeat this procedure until the material has been dumped. If the transmission shift lever is moved to any position other than NEUTRAL when the hoist control is not in FLOAT, the central warning lamp will flash and the alarm buzzer will sound intermittently. 9. With the body on the frame, move the transmis- sion shift lever to DRIVE. Release the brake lock switch, and carefully exit the dump area. 6. When the dump body rises to the desired posi- tion, release the hoist control lever. The lever will return to the HOLD position.
If necessary to raise the body further, move the dump lever to POWER UP. The dump body will rise until the hoist cylinders are fully extended.