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Experience | Coal Compaction

Coal Compaction

Take no risks

Dressta dozers can be equipped with additional mounting compaction equipment for slope rolling tasks. By compacting the surface area of the slope air pockets are eliminated, thus reducing the risk of heat build-up leading to the combustion of trapped air. The Dressta slope rolling attachment itself is both reliable and easy to operate.

We are able to listen, advise and implement Special Feature Requests (SFR) to ensure your slope rolling attachment is ideally matched for the task at hand. Take a look at how our machines excel on the slopes.

If you cannot find the model below with the appropriate engine configuration (Emission Levels: Tier 3, Tier 4 Interim, Tier 4 Final) for your region, please email us or contact your local dealer.

Download Mining and coal compaction brochure:
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TD-20M

TD-20M

TD-20M

TD-20M

TD-20M

TD-20M

Steel Drum Attachment

Slope rolling tasks are performed by attaching a specially designed steel compaction drum to a winch line on the back of the Dressta dozer, allowing the compaction drum to be deployed on the slope of the stockpile.

Reliable Drum Bracket & Support

The drum is equipped with brackets to attach it to a tense winch line, with a line tensioning system to prevent it contacting the slope during or after operation. A mechanism ensures optimal line guiding and tensioning, and a cleaning system is implemented to remove coal contamination.

The joystick-controlled drum support system means the crawler dozer can be used for other tasks while the compaction drum is attached.

Superior Dozer Stability

Dressta crawler dozers can operate on a maximum slope gradient of 25° for length-wise slopes, and 20° for cross-wise slopes. 

Machines Engineered for Coal Compaction

Optimal power to weight ratio for unrivalled traction & drawbar pull…

The TD-25R Extra sets the standards for others to follow and is a result of DRESSTA’s experience in designing highly efficient and productive Crawler Dozers.

Design concepts utilised in the TD-25R Extra include, optimisation of weight distribution, modular construction, and use of a one-piece main frame, two-speed Steering Drive and a 3-point track mounting system. Optimal performance is achieved when machine weight is matched to power and the TD-25R Extra provides a second-to-none balance of weight for traction and power for unrivalled drawbar pull.

 

Key Specifications

Driveline
Engine Manufacturer / Model / TierCummins/QSX 15/T4F
Displacement15.00 l915.4 in3
Rated Speed2000 RPM
Engine Output - Net280 kW375 hp
Rated Speed - Torque1200 RPM
Engine Torque1993 Nm1,470.0 lb/ft
Transmission Type - Fwd Rev SpeedsPowershift - 6/6
Carrier Rollers / Track Rollers2/6
Shoe Pitch250 mm9.8 in
Track Shoe Width560 mm22.0 in
Ground Contact Area36600 cm25,673.0 in2
Number of Shoes39
Capacities
Fuel Tank770 l203.4 Gal(US)
Hydraulic Tank130 l34.3 Gal(US)
Blade Capacity9.60 m312.6 yd3
Dimensions
Height Top of ROPS (Max)3800 mm149.6 in
Ground Clearance576 mm22.7 in
Width - Over Tracks2700 mm106.3 in
Track Length - On Ground3270 mm128.7 in
Blade Width4050 mm159.4 in
Ground Clearance576 mm22.7 in
Performance
Speed Forward - Maximum10.30 km/h6.4 MPH
Speed Reverse - Maximum12.20 km/h7.6 MPH
Ground Bearing Pressure111.00 kPa16.1 psi
Drawbar Pull Maximum793 kN178.3 lbf
Implement Pump Flow305.50 l/min10.8 cfm
Operating Weight
Operating Weight41250 kg90,940.6 lb

Features & Benefits

WORKING EQUIPMENT
Blades

  • Standard Semi-U Blade design combines the penetration ability of a straight blade with the increased capacity provided by short wings. It is used for heavy duty applications such as mining and road construction.
  • The Full-U Blade provides high volume movement of light non-cohesive materials such as coal and woodchips.
  • Coal Blade for excellent coal pile productivity. Its length, height, and wing angles were developed specifically for high production coal dozing. The blade pocket is in the right place to deliver a live, rolling load. Extended end plates help contain loads and eliminate side spillage.

 

BLADE SELECTION SEMI-U FULL-U ANGLE COAL
UNDERCARRIAGE STD STD STD STD
BLADE CAPACITY
SAE J1265
9.6 m3
(12.5 yd3)
11.5 m3
(15.0 yd3)
5.7 m3
(7.4 yd3)
21.0 m3
(27.5 yd3)

Rippers
Adjustable parallelogram multi-shank ripper offers excellent 868 mm (34.2”) penetration in extremely tough materials and can be used with up to 3 shanks adjusted to two vertical positions. The single shank ripper option offers a standard shank with 1250 mm (49.2”) penetration and a deep shank option with an exceptional 1700 mm (66.9”) penetration, allowing full use of the remarkable drawbar pull of the machine.


ENGINE
The TD-25R Extra is powered by a diesel engine that delivers outstanding power & torque;

  • Heavy Duty Cummins QSX 15 litre Tier 4 Final /EU Stage IV Diesel Engine.
  • Direct injection, in-line, 6 cylinder, 4 stroke, turbocharged & Charge Air Cooled (CAC) engine developing 280 kW (375 hp) Net at rated engine speed of 2000 rpm


TRANSMISSION
Transmission system that automatically matches speed to load conditions for optimal push power, preventing driveline shock, multiplying the torque required while delivering 6 forward and 6 reverse speeds.

  • Torque Converter
  • 3-Speed Powershift Transmission
  • 2-Speed Steering Drive
  • Double reduction Final Drive

The modular design drivetrain incorporates the engine, torque converter, transmission, steering drive and final drives. Components can be easily removed & re-fitted without oil loss ensuring maximum machine uptime.


HYDRAULICS
A proven design multiple pump system & high capacity hydraulic reservoir for improved cooling. Hose & tube routings are accessible and yet well protected to prevent accidental damage. Trimble ready option is available on factory build orders.

Two-speed steering module on Dressta dozers maintains power to both tracks – at all times. You get the benefit of vastly improved traction to push loads effortlessly through turns, quickly and smoothly.


CAB - OPERATOR STATION & CONTROLS
Deluxe 6-sided ROPS / FOPS Cab with enlarged glass area provides a clear and direct line of sight to both the blade and ripper. The comfortable, sound-suppressed, pressurised cab is equipped with:

  • Efficient air recirculation system
  • Air conditioner & heater with multiple vents
  • Deluxe air suspension seat with adjustable arm rests. The seat swivels 14 degrees to the right for better ripper viewing
  • Ergonomically designed joystick controls for direction, blade and ripper operations.


ROBUST FRAME AND UNDERCARRIAGE
DRESSTA Mainframe and Track frame system ensures excellent machine balance for dozing, ripping, or final grading applications. 

  • Mainframe – a one-piece weldment consisting of the front frame, rear frame, and equaliser bar. The rugged design of the mainframe absorbs impact shock loads and twisting forces to ensure a long life.
  • High quality sealed and lifetime lubricated track rollers
  • Heavy-duty idlers and track tensioners

Tracks – High quality durable tracks for tough working conditions;

  • Track Chain - Links made of drop forged steel alloy and strutted to resist twisting and working stresses.
  • Track Shoes - Wide range of track shoe widths helps to match TD-25R Extra perfectly to all types of ground conditions.
  • Dressta Lubricated Track System (LTS)

Track Chain Guides and Track Roller Guards – Track chain guides are standard equipment and full length track roller guards are optional.

  • Suspension System – 3-point suspension system consisting of two pivot shafts and equaliser bar.

Key Specifications

Driveline
Engine Manufacturer / Model / TierCummins/QSL9/T4F
Displacement8.90 l543.1 in3
Rated Speed2200 RPM
Engine Output - Net185 kW248 hp
Rated Speed - Torque1500 RPM
Engine Torque1213 Nm894.7 lb/ft
Transmission Type - Fwd Rev SpeedsPowershift - 6/6
Carrier Rollers / Track Rollers2/6
Shoe Pitch216 mm8.5 in
Track Shoe Width560 mm22.0 in
Ground Contact Area32000 cm24,960.0 in2
Number of Shoes40
Capacities
Fuel Tank420 l111.0 Gal(US)
Hydraulic Tank115 l30.4 Gal(US)
Blade Capacity7.04 m39.2 yd3
Dimensions
Height Top of ROPS (Max)3480 mm137.0 in
Ground Clearance460 mm18.1 in
Width - Over Tracks2540 mm100.0 in
Track Length - On Ground2860 mm112.6 in
Blade Width3500 mm137.8 in
Ground Clearance460 mm18.1 in
Performance
Speed Forward - Maximum10.50 km/h6.5 MPH
Speed Reverse - Maximum12.20 km/h7.6 MPH
Ground Bearing Pressure73.50 kPa10.7 psi
Drawbar Pull Maximum610 kN137.1 lbf
Implement Pump Flow239.70 l/min8.5 cfm
Operating Weight
Operating Weight24340 kg53,660.5 lb

Features & Benefits