jcb JS300 Service Manual page 189

When you dig with the dipper, keep the dipper angle within a range of 45° to the front and 30° to the rear. In
this range if the boom and bucket are also used, the efficiency of the operation is increased.
Backfilling
When you backfill on a slope, pile the material on the high side of the trench if possible.
1. Move the bucket level to the ground.
2. Select a bucket height and excavating speed which will give you a maximum depth of cut, without
overloading the machine.
3. Work at right angles to the trench and fill a buckets width at a time. Leave any spillage until the trench
is filled.
4. Use the spillage to finish the job by driving the length of the trench with bucket low to the ground.
Travelling With a Load (Pick and Carry)
WARNING Do not use the machine for object handling unless it is equipped for this purpose. Without the
relevant devices the machine can become unstable and tip over. You and others could be seriously injured
or killed.
If your machine is not fitted with a lift point (for example a hook or shackle), hose burst check valves, load
charts and a overload warning system then it must not be used for object handling.
1. Stop the machine on solid, level ground.
2. Align the undercarriage with the upper structure.
Refer to: Operation > Operating Levers/Pedals (Page 96).
3. Make sure that the load is within the capacity of the machine. Refer to the lift chart in the machine cab.
4. When possible the load should be attached to the machine frame to prevent the load from swinging and
causing instability.
114
Figure 148.
90
90
30
Figure 149.
30
45
9831/1100-2
Working with the Excavator Arm
90
Operation
114