D7R Track-Type Tractor Bulldozing Caterpillar

D7R Track-Type Tractor [SEBU6890]
D7R Track-Type Tractor Bulldozing
D6R Track-Type Tractor Ripping
1.1. Straight Dozing
2.1. Slot Dozing
3.1. Machine on a Slope
4.1. V-Ditching
5.1. Backfilling

Straight Dozing

Illustration 1g00040620

Straight Dozing - Maintain a level cut for the best performance. Fill the bulldozer blade. Carry the load to the landfill.

  • Bypass lugging or stalling the machine.

  • Avoid excessive spinning of the track.

  • If turning the machine with a load is necessary, use the bulldozer tilt cylinders instead of the steering lever in order to steer the machine.

When you are performing levelling work, a full bulldozer blade manages better than a partially loaded bulldozer blade.

Slot Dozing

Illustration 2g00040626

Slot Dozing - When you trap material in a slot, you can carry larger loads in front of the bulldozer blade.

The depth of the slot should not be deeper than the top corner of the bulldozer blade.

Illustration 3g00040622

Start the slot at the dump end. Operate rearward. This is shown in figure (A) . This technique permits loading downhill. This permits carrying the load on a level surface. When you are working from the rear of the slot to the dump end, the previous technique is more efficient. This is shown in figure (B) . Uphill loading does not utilize the slot. This is shown in figure (B) . Level dozing through the entire slot is inefficient. This is due to the longer distance of the push.

Illustration 4g00040628

When you are digging parallel slots, the center should be removed from the rear. This procedure permits the operator to maintain a slot until the center is removed. Maintain the center at a minimum width. Maximum width should be approximately 1/3 of the bulldozer blade.

Machine on a Slope

Illustration 5g00040630

When possible, work on a slope vertically. This method is better than working horizontally.

When you are working on banks, use caution. When you are working on slopes, use caution. Avoid tipping the machine.

If the machine starts to sideslip on a slope, lighten the load and turn the machine downhill.

If you are working horizontally on a slope, start at the top of the slope. Work downhill. Maintain a windrow of material on the low side of the machine in order to provide stability.

Use caution in order to not undercut the slope. Undercutting the slope will increase the slope.


Illustration 6g00040633

V-Ditching - Tilt the bulldozer blade in order to start the desired slope. Be cautious of underfoot conditions. Position the corner of the bulldozer blade in the center of the ditch. Cut to the desired depth.


Illustration 7g00040635

Backfilling - Push the material at a 90 degree angle in order to fill a trench. Use caution in order to not twist on new backfill. When you are cutting material on the side, use caution so that the material does not fall on the machine.