Disabled Truck Dumping Procedure; Hookup; Engine - Komatsu HD1500-7 Operation & Maintenance Manual

OM3054 03/13
DISABLED TRUCK DUMPING
PROCEDURE
Sometimes it is necessary to dump a load from the
body of a disabled truck with an inoperable hoist sys-
tem. The following instructions describe the use of a
"good" truck to provide the hydraulic power required
to raise the body of a disabled truck to dump the
load.
Figure 30-6 shows the quick disconnect fittings on a
hoist manifold for connecting the hoist circuits
between trucks.
FIGURE 30-6. HOIST CIRCUIT QUICK DISCONNECT FITTINGS
1. Power Down Circuit
Operating Instructions - Section 30

Hookup

Ensure there is an adequate and safe area to dump
the loaded dump body.
1. Safely park the good truck as close as possible
to the disabled truck. When the good truck is in
position next to the disabled truck, turn off the

engine.

2. Purge the pressure from the brake accumula-
tors, steering accumulators, and hydraulic tanks
on each truck.
3. Attach a hose from the power up quick discon-
nect on the good truck to the power down circuit
on the disabled truck. Hoses must be rated to
withstand 19 305 kPa (2800 psi) or greater
pressure.
NOTE: The power down circuit uses a smaller
diameter hose (tube) than the power up circuit.
4. Connect another hose from the power down
quick disconnect on the good truck to the power
up circuit on the disabled truck.
2. Power Up Circuit
Page 30-17