Operation - Section 3 OM3024.1 8/00 Page 3-10 Operating Instructions DUMPING To Raise dump body: 1. Pull into dump area with extreme caution. Make sure area is clear of persons and obstructions, including overhead utility lines. Obey signals di- rected by the spotter, if present. Avoid unstable areas. Stay a safe distance from edge of dump area. Position truck on a solid, level surface before dumping . The dumping of very large rocks (10% of payload, or greater) or sticky material (loads that do not flow freely from the body) may allow the material to move too fast and cause the dump body to move RAPIDLY and SUDDENLY.
This sudden movement may jolt the truck violently and cause possible injury to the operator, and/or damage to the hoist cylinders, frame, and/or the dump body hinge pins. If it is necessary to dump this kind of material, refer to the CAUTION in the following procedure: As body raises, the truck Center of Gravity (CG) will move. Truck must be on level surface to pre- vent tipping / rolling! 4. Pull the Hoist Control Lever (1, Figure 3-3) back to the “RAISE” position (4) and release lever. 2. Carefully maneuver truck into dump position. When backing truck into dump position, use only the foot-operated brake pedal to stop and hold truck.
(Releasing the hoist lever anywhere during the “Hoist Up/RAISE” operation will place the dump body in “HOLD” at that position.) 3. When in dump position, place transmission range selector at the “ N eutral” position, and apply the Brake Lock switch. 5. Raise engine RPM to accelerate hoist speed. Refer to the CAUTION below. When body is near the maximum angle, reduce engine RPM (reduce foot pressure on the accel- erator pedal) to reduce shock load to the hydraulic system and hoist cylinders. If dumping very large rocks or sticky material as decribed in WARNING above, slowly accelerate engine RPM to raisethe dump body. When the material starts to move, release hoist lever to “HOLD” position.
If the material does not continue moving and clear the dump body, repeat this procedure until material has cleared body. 6. When the dump body rises to the desired position, release the hoist control lever (it will return to the “HOLD” position). If desired to raise the body further, move dump lever again to “RAISE” posi- tion and dump body will rise until hoist cylinders are fully extended. FIGURE 3-3. HOIST CONTROL VALVE 1. Hoist Control Lever 2. “FLOAT”/"HOLD" Position 3. “DOWN” Position 4. “RAISE” Position 5. Center Console ARROW Points to Front of Truck (Releasing the hoist lever anywhere during the “Hoist Up/RAISE” operation will place the dump body in “HOLD” at that position.)