OM3013 02/99 Operation - Section 3 Operating Instructions Page 3-11 To Raise dump body: To Lower Body: 8. After material being dumped clears body, move dump lever to the "LOWER" position and dump body will start to move down. 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 body to move RAPIDLY and SUDDENLY. This sudden move- ment may jolt the truck violently and cause pos- sible injury to the operator, and/or damage to the hoist cylinders, frame, and/or body hinge pins.
If it is necessary to dump this kind of material, refer to the CAUTION in the following procedure: 9. Release the lever and it will return automatically to the "FLOAT" position. The body will move down under its own weight. If dumped material builds up at body tailgate and body cannot be lowered, shift Transmission Range Selector to "D" (Drive), release park brake lever, and drive for- ward to clear material. Stop, shift Transmission Range Selector to "N" (Neutral), apply park brake lever and lower body. See NOTE :* below. 4. Pull dump lever up to the "RAISE" position and release lever. 5. Raise engine RPM to accel- erate hoist speed. Refer to the CAUTION below.
When body is near the maximum angle, reduce engine RPM (reduce foot pres- sure on the accelerator pedal) to reduce shock load to the hydraulic system and hoist cylinders. cylinders, If dumping very large rocks or sticky material as described in WARNING above, slowly accelerate engine RPM to raise body. When the material starts to move, move hoist lever to "HOLD" posi- tion. If material does not continue moving and clear body, repeat this procedure until material has cleared body. NOTE: When traveling, always place the dump lever at the FLOAT position, regardless of whether or not the truck is loaded. 6.
When the dump body rises to the set position (adjusted position of body positioner) dump lever returns to the "HOLD" position. If desired to raise the body further, move dump lever to raise position and dump will rise. If dump lever is released, lever will return to hold position. Dump body will stop in that position. * If the transmission range selector is moved to any position other than "N" (neutral) when the dump lever is not at the FLOAT position, the central warning lamp will flash and the alarm buzzer will sound intermittently. 10. With body returned to frame, move Transmis- sion Range Selector to "D" (Drive), release park brake lever, and leave dump area carefully. 7.
After material being dumped clears body, lower body to frame. The truck is not to be with the dump body except for emergency only. Failure to lower before moving truck ma damage to hoist cy frame and/or body hinge