Operation - Section 3 10/00 OM3023 Page 3-24 Operating Instructions If truck is equipped, this pedal (11, Figure 3-1) is used to actu- ate the differential lock control. Differential Lock Pedal (Optional) 3. When the dump body rises to the set position (adjusted position of body positioner) dump lever returns to the hold posi- tion. If desired to raise the body further, move dump lever to raise position and dump body will rise. If dump lever is released, lever will return to hold position. Dump body will stop in that position. When the pedal is depressed, the differential lock is actuated, and when it is released, the dif- ferential lock is canceled.
Depress differential lock pedal 5 - 10 m (16 - 33 ft.) before entering the area where the tires may start to slip. 4. After material being dumped clears body, move dump lever to the lower position and dump body will start to move down. NOTE: Do not apply the differential if the wheels are already slipping or truck speed is higher than 12.4 MPH (20 km/h) 4th gear. Do not use the differential lock while turning a corner. Refer to Section G of this manual for further details. 5. After lowering the dump body a certain distance, move dump lever to the FLOAT position. Release the lever and it will return automatically to the FLOAT position. The body will move down under its own weight.
(12) Hoist Control NOTE: When traveling, always set the dump lever at the FLOAT position, regardless of whether or not the truck is loaded. 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 light up and the alarm buzzer will sound. The hoist control (12, Figure 3-1) is a four position, hand operated control lever located to the left of the operator seat. The hoist control lever and hoist con- trol valve are connected by a mechanical push-pull control cable. To raise the dump body: (refer also to "Operating Instructions, DUMPING" ) 6. Release Parking Brake Valve Lever. 1.
Move Shift Lever (1) to the “N” position, and apply Parking Brake Valve Lever (6) to LOCKED position. SAFETY LOCK Move hinged lock around dump lever. This device locks the dump lever in the HOLD position. Move dump lever to the "RAISE" position and release dump lever: it will remain in this position until moved to HOLD - either manually or by the body-up limit linkage. When carrying out inspection on the machine with the body raised, always lock the dump lever in the HOLD position, and then install the body up safety pins. 2. Raise engine RPM to accel- erate hoist speed.
When body is near the maxi- mum angle, reduce engine RPM (reduce foot pressure on the accelerator pedal) to reduce shock load to the hydraulic system and hoist cylinders.