• Get in and extract material close to the high wall – this attachment gives you the capability to cut along a vertical high wall
  • The chains are driven by low-speed, high-torque hydrostatic motors
  • Conduct surface mining extraction, remove ground surface, or create a smooth, level area for site preparation
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T1255III Chain Drive Surface Miner Features & Benefits

More production with high wall capability

Using a single-drive motor to power the drum allows for the ability to cut an 80° high wall compared to the 45° high wall when using the dual drive attachment.

Minimize jobsite dust

Optional dust suppression system features an enclosed cutting head with two large vacuums to help reduce dust onsite.

Advanced technology for improved machine efficiency

SmartTEC performance monitoring assists operators with adjustments to machine controls to help improve efficiency and tracks the operational performance of the machine on a consistent platform across all machine models.

Maximized engine productivity

Load control allows the machine to automatically adjust ground speed to use full engine horsepower, thus maximizing productivity.

Elevated operator visibility and comfort

The elevating cab allows optimal visibility and added comfort with the air ride seat. The sealed cab has self-contained heating and air conditioning with sound-attenuating foam. It is also a rollover module (ROM).

T1255III Chain Drive Surface Miner Specs & Compare

TRANSPORT DIMENSIONS 
Approach Angle15 deg
Height Range146 (370.8 cm)
Length with 50" (127 cm) End Idler and 8 ft (2.44 m) Boom43 ft
Length with 50" (127 cm) End Idler and 10 ft (3.05 m) Boom45.5 ft
Length with 50" (127 cm) End Idler and 12 ft (3.66 m) Boom48 ft
Length with 50" (127 cm) End Idler and 14 ft (4.27 m) Boom (with Restraint Bar)48.8 ft
Length with 50" (127 cm) End Idler and 16 ft (4.88 m) Boom (with Restraint Bar)51.3 ft
Length with 50" (127 cm) End Idler and 18 ft (5.49 m) Boom (with Restraint Bar)53.8 ft
Weight Range150,000 lb - 205,000 lb (68,039.9 kg - 92,986.4 kg)
Width Ranges134" (340.4 cm)
ENGINE - OPTION ONE 
Make and ModelCaterpillar C18 ACERT Tier 3
Gross Horsepower600 hp
Rated Engine RPM2100
Number of Cylinders6
Fuel Tank Capacity370 gal
Operating Range11.6 hours
Fuel Consumption at Full Load31.8 gph
Maximum Engine Operating Angle (Operating angles do not indicate safe machine operating angles)35 deg
Air CleanerDry-type with precleaner
AspirationTurbocharged and air-to-air aftercooled
Cooling MediumLiquid
Electrical System24 Volt DC
Oil FilterFull flow
ENGINE - OPTION TWO 
Make and ModelCaterpillar C18 ACERT Tier 4 Final
Gross Horsepower600 hp
Rated Engine RPM2000
Number of Cylinders6
Fuel Tank Capacity370 gal
Operating Range12.1
Fuel Consumption at Full Load30.5 gph
Maximum Engine Operating Angle (Operating angles do not indicate safe machine operating angles)35 deg
Air CleanerDry-type with precleaner
AspirationTurbocharged and air-to-air aftercooled
Cooling MediumLiquid
Electrical System24 Volt DC
Oil FilterFull flow
TRACKS 
Auto Self LevelNo
Ground Pressure Minimum15.5 psi
Ground Pressure Maximum21.1 psi
Tilt Track AvailableNo
Track Drive TypeDual path hydrostatic with planetary transmission
Track Length181.5 in
Track Pad TypeDouble grouser
Track Pad Width Ranges30" (76.2 cm)
Track SizeCat 375 Excavator
Maximum Ground Speed - Low48.1 ft/min
Maximum Ground Speed - High128.4 ft/min
Parking and Emergency Brakespring-applied, hydraulic release, wet disc brake
Service BrakesHydrostatic
ATTACHMENTS 
TrencherYes
Terrain LevelerYes
RockwheelNo
Bucket WheelNo
CAB 
CabYes
Control SystemTEC Plus with SmartTEC
Air Conditioner/HeaterYes
Air Suspension SeatYes
AM/FM Stereo with Weather BandYes
ElevatingYes
Pressurized/Filtered AirYes
Rollover Protective Structure (ROPM)Yes
HYDRAULIC SYSTEM 
Oil Tank Capacity210 gal
Oil TypeHyPower 68, HyPower 100, Hy Power 1100
Pressure Setting2500 psi
Pump Flow at Maximum RPM28.7 gpm
Pump Typepressure-and-flow-compensated (load-sensing)