WHEEL AS-COMPRESSOR 7C9989 - Caterpillar

Move the machine whenever the digging position is not efficient. The machine can be moved forward or backward anytime during the operating cycle. Feather travel pedals to move while using other hydraulic controls.Utilize the bucket or other attachment to push or pull the machine, or lift up the tracks, in order to work into and out of close places.When making frequent turns in soft material, travel in a straight direction occasionally to clear the tracks.Backhoe Operation - Digging
Know the location of buried cables. Mark them clearly before digging.When swinging into a ditch, do not use the ditch to stop the swinging motion. Inspect the machine for damage if machine is swung into a bank or an object.Repeated chopping with the bucket can cause structural damage. Use a digging, scratching or peeling motion when trying to penetrate rock, frozen ground or hard surfaces. Use of a specially designed bucket attachment should be considered.
With certain boom-stick-bucket combinations, the bucket can hit the cab, or the front of the machine.Always check for interference when first operating a new attachment.
1. Position stick at approximately 70° to the ground. 2. Set bucket cutting edge at approximately 120° to the ground. Maximum breakout force can now be exerted with the bucket. 3. Move stick in and keep bucket parallel with the ground. 4. If stick travel stops due to load, adjust depth of cut by raising boom and/or curling bucket. When digging, down pressure on the bucket must be relieved as stick travels, to apply greater force to the cutting edge. Maintain bucket at an attitude that will assure a continuous flow of material into the bucket.
With certain boom-stick-bucket combinations, the bucket can hit the cab, or the front of the machine.Always check for interference when first operating a new attachment.
5. Continue the pass with the cutting edge traveling in a horizontal direction, peeling material into the bucket. 6. Raise the bucket when it is full. (Engage two speed hydraulic control pedal for additional speed.) 7. Engage swing control as soon as bucket is clear of excavation and obstructions. 8. When dumping, open bucket and move stick out in one smooth motion. To provide a stable working surface, dump spoil away from the edge of the trench.Lifting
Do not exceed rated capacity of machine. If machine is not on level ground, capacities will vary.Use short slings to prevent excessive load swing.
Damage to bucket cylinder, bucket or linkage could result if slings are placed incorrectly.
1. Slings are attached to the hook on the back of the bucket. Lifting capacities are calculated from this position. 2. Picking up a load over a corner is the most stable lifting position. 3. An unstable condition can result if load exceeds the machine's capacity, and is swung over the side or end. 4. For best stability, carry load close to the machine, and as close to the ground as possible. 5. Lifting capacity decreases as the radius of the load from the swing centerline increases.Clamshell Operation - Digging
The clamshell