- Articulated Truck:
- 735 (S/N: AWR1-UP)
- 740 (S/N: AXM1-UP)
- D350E Series II (S/N: 2XW1-UP)
- D400E Series II (S/N: 8PS1-UP)
Reference: Operation and Maintenance Manual, "Hoist Control".
The correct operation of the hoist control is important on the listed machines. Whenever you require the body to remain in a raised position, the hoist lever must be placed in the HOLD position. The hoist lever must not be placed in the FLOAT position even if the body is over the center of balance of the pivots and the body is able to maintain a raised position because of gravity.
Because of the combination of the hydraulic oil for the brake system and the hoist system on the listed machines, a slight pressure differential across the piston heads in the hoist cylinders can occur under certain operating conditions. If the listed machines are left in the FLOAT position, this pressure differential will gradually return the body over the center of balance of the pivots and the body will subsequently lower onto the chassis. Proper use of the RAISE, HOLD, LOWER and FLOAT positions of the hoist control is important for the correct operation of the machine.
Consult the Operation and Maintenance Manual for further information.