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973K Steel Mill

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Overview

Factory designed and installed features equip your track loader for the extreme heat and harsh conditions of steel mill work. Maneuverability, visibility and the breakout force needed for fast cycle times make crawler loaders a rugged and efficient choice for handling slag.

Engine

  • Flywheel Power 275.0 HP 205.0 kW
  • Engine Model Cat C9.3 ACERT™ Cat C9.3 ACERT™
  • Emissions U.S. EPA Tier 4 Final/EU Stage IV/Korea Tier 4 U.S. EPA Tier 4 Final/EU Stage IV/Korea Tier 4
  • Engine Power - Maximum - SAE J1995 310.0 HP 231.0 kW
  • Engine Power - Maximum - ISO 14396 306.0 HP 228.0 kW
  • Engine Power - Maximum - ISO 14396 (DIN) 310.0 HP 228.0 kW
  • Net Power (Rated) - ISO 9249/SAE J1349 275.0 HP 205.0 kW
  • Net Power (Rated) - ISO 9249/SAE J1349 (DIN) 278.0 HP 205.0 kW
  • Note (1) Engine ratings at 1,800 rpm. Engine ratings at 1,800 rpm.
  • Note (2) No derating required up to 2164 m (7,200 ft) altitude. No derating required up to 2164 m (7,200 ft) altitude.
  • Note (3) All nonroad Tier 4 Final, Stage IV and Korea Tier 4 diesel engines are required to use only Ultra Low Sulfur Diesel (ULSD) with 15 ppm (mg/kg) of sulfur or less, or up to B20 biodiesel blended with ULSD. B20 should meet ASTM D7467 specification (biodiesel blend stock should meet Cat biodiesel spec, ASTM D6751 or EN 14214). Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specification are required. Consult your OMM for further machine specific fuel recommendations. All nonroad Tier 4 Final, Stage IV and Korea Tier 4 diesel engines are required to use only Ultra Low Sulfur Diesel (ULSD) with 15 ppm (mg/kg) of sulfur or less, or up to B20 biodiesel blended with ULSD. B20 should meet ASTM D7467 specification (biodiesel blend stock should meet Cat biodiesel spec, ASTM D6751 or EN 14214). Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specification are required. Consult your OMM for further machine specific fuel recommendations.
  • Note (4) Diesel Exhaust Fluid (DEF) used in Cat Selective Catalytic Reduction (SCR) systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241. Diesel Exhaust Fluid (DEF) used in Cat Selective Catalytic Reduction (SCR) systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241.

Weights

  • Operating Weight 74293.0 lb 33699.0 kg
  • Operating Weight - Steel Mill 74293.0 lb 33699.0 kg
  • Shipping Weight - Steel Mill 63097.0 lb 28621.0 kg
  • Note Steel Mill weights are with new slag bucket. Steel Mill weights are with new slag bucket.

Buckets

  • Capacity - General Purpose 4.0 yd³ 3.0 m³
  • Capacity - Slag 4.0 yd³ 3.0 m³
  • Width - Slag 112.0 in 2846.0 mm

Undercarriage

  • Track Shoe Type Heavy Duty Sealed and Non Lubricated - Steel Mill, Double Grouser Heavy Duty Sealed and Non Lubricated - Steel Mill, Double Grouser
  • Track Shoe Width - Standard 19.7 in 500.0 mm
  • Track Rollers - Each Side 7 7
  • Number of Shoes - Each Side 40 40
  • Track on Ground 115.4 in 2930.0 mm
  • Ground Contact Area (ISO 16754:2008): Steel Mill Shoe - 500 mm (19.7 in) 5161.0 in² 3.33 m²
  • Ground Pressure* (ISO 16754:2008): Steel Mill Shoe - 500 mm (19.7 in) 14.4 psi 99.3 kPa
  • Grouser Height - Double Grouser 1.9 in 49.0 mm
  • Track Gauge 85.0 in 2160.0 mm
  • Link Pitch 8.5 in 215.9 mm
  • Note * Calculated using Steel Mill operating weight with Slag Bucket. * Calculated using Steel Mill operating weight with Slag Bucket.

Service Refill Capacities

  • Fuel Tank 101.5 gal (US) 384.0 l
  • Cooling System 11.6 gal (US) 44.0 l
  • DEF Tank 9.2 gal (US) 35.0 l

Air Conditioning System

  • Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes. The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes.

Standards

  • ROPS ROPS (Rollover Protective Structure) offered by Caterpillar for the machine meets ROPS criteria ISO 3471:2008. ROPS (Rollover Protective Structure) offered by Caterpillar for the machine meets ROPS criteria ISO 3471:2008.
  • FOPS FOPS (Falling Object Protective Structure) meets ISO 3449-2005 Level II. FOPS (Falling Object Protective Structure) meets ISO 3449-2005 Level II.
  • Brakes Brakes meet the standard ISO 10265:2008. Brakes meet the standard ISO 10265:2008.
  • Cab - Declared Dynamic Operator Sound Pressure Level
    • The declared dynamic operator sound pressure level when "ISO 6396:2008" is used to measure the value for an enclosed cab is 75 dB(A). The measurements were conducted at 80% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The cab was properly installed and maintained. The measurements were conducted with the cab doors and the cab windows closed.
    • NOTE: The dynamic operator sound pressure level uncertainty is ± 2 dB(A).
    • The declared dynamic operator sound pressure level when "ISO 6396:2008" is used to measure the value for an enclosed cab is 75 dB(A). The measurements were conducted at 80% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The cab was properly installed and maintained. The measurements were conducted with the cab doors and the cab windows closed.
    • NOTE: The dynamic operator sound pressure level uncertainty is ± 2 dB(A).
  • Cab - Hearing Protection Hearing protection may be needed when the machine is operated with an open operator station for extended periods, in a noisy environment or with a cab that is not properly maintained. Hearing protection may be needed when the machine is operated with an open operator station for extended periods, in a noisy environment or with a cab that is not properly maintained.
  • Cab - Labeled Sound Power Level The guaranteed exterior sound power level (LWA) is measured according to the dynamic test procedures and the conditions that are specified in "ISO 6395:2008" [111 dB(A)]. The measurements were conducted at 80% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The guaranteed exterior sound power level (LWA) is measured according to the dynamic test procedures and the conditions that are specified in "ISO 6395:2008" [111 dB(A)]. The measurements were conducted at 80% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds.
  • Sound Level Information (EU)
    • Sound Level Information for Machines in European Union Countries and in Countries that Adopt the "EU Directives": The declared dynamic operator sound pressure level when "ISO 6396:2008" is used to measure the value for an enclosed cab is 75 dB(A). The measurements were conducted at 80 percent of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The cab was properly installed and maintained. The measurements were conducted with the cab doors and the cab windows closed.
    • NOTE: The dynamic operator sound pressure level uncertainty is ± 2 dB(A).
    • If equipped, the certification label is used to verify the environmental sound certification of the machine to the requirements of the European Union. The value that is listed on the label indicates the guaranteed exterior sound power level (LWA) at the time of manufacture for the conditions that are specified in "2000/14/EC."
    • Sound Level Information for Machines in European Union Countries and in Countries that Adopt the "EU Directives": The declared dynamic operator sound pressure level when "ISO 6396:2008" is used to measure the value for an enclosed cab is 75 dB(A). The measurements were conducted at 80 percent of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. The cab was properly installed and maintained. The measurements were conducted with the cab doors and the cab windows closed.
    • NOTE: The dynamic operator sound pressure level uncertainty is ± 2 dB(A).
    • If equipped, the certification label is used to verify the environmental sound certification of the machine to the requirements of the European Union. The value that is listed on the label indicates the guaranteed exterior sound power level (LWA) at the time of manufacture for the conditions that are specified in "2000/14/EC."

Dimensions

  • Overall Machine Width without Bucket: Steel Mill Tracks - 500 mm (19.7 in) Shoes 107.9 in 2740.0 mm
  • Overall Machine Width with Slag Bucket: Steel Mill Tracks - 500 mm (19.7 in) 116.5 in 2960.0 mm
  • Ground Clearance 18.5 in 469.0 mm
  • Machine Height - Top of Cab 140.0 in 3560.0 mm
  • Length - Front of Track 209.6 in 5323.0 mm
  • Overall Machine Length* 298.4 in 7579.0 mm
  • Carry Position Approach Angle 15° 15°
  • Digging Depth* 6.2 in 158.0 mm
  • Maximum Rollback - Ground/Carry Position 43°/47° 43°/47°
  • Bucket Height - Carry Position 19.0 in 483.5 mm
  • Reach at Full Lift Height and 45° Dump* 53.8 in 1366.0 mm
  • Clearance at Full Lift Height and 45° Dump* 116.2 in 2952.0 mm
  • Maximum Rollback/Dump - Fully Raised 59°/49° 59°/49°
  • Grading Angle 85° 85°
  • Height - Bucket Hinge Pin 166.1 in 4218.0 mm
  • Overall Machine Height - Bucket Fully Raised 226.5 in 5752.0 mm
  • Height to Top of the Seat with Headrest 117.6 in 2988.0 mm
  • Height - Top of Stack 120.8 in 3069.0 mm
  • Ramp Angle 29° 29°
  • Note *With General Purpose bucket Performance with heavy duty teeth. Dimensions vary with bucket. Refer to Operating Specifications chart.
    • Machine Height to Top of Cab is with Steel Mill plate.
    *With General Purpose bucket Performance with heavy duty teeth. Dimensions vary with bucket. Refer to Operating Specifications chart.
    • Machine Height to Top of Cab is with Steel Mill plate.

Durability

        
  • Specialized heavy duty guarding, insulation, thermal deflectors and high temperature seals throughout the machine.
  •     
  • Welded side bars reduce thermal distortion of the track roller frame.    
  •     
  • Anti-abrasion guards protect the final drive seals.    
  •     
  • Pressure relief/flash spark arrester on fuel tank cap.  
  •     
  • Steel mill cab with heavy duty, laminated windshield glass.    
  •     
  • Metallic screen on windshield grill to help protect glass and maintain good visibility; hinged for quick cleaning access.    
  •     
  • Metallic shield integrated in bottom of cab doors helps protect windows against slag.    
  •     
  • Specialized heat resistant seals and cab materials.    
  •     
  • Steel plate on top of cab greatly reduces radiant heat transfer into cab.    
  •     
  • New high capacity slag bucket features thicker structures and stronger teeth/cutting edges for longer service life.    
  •     
  • Choice of track shoes lets you optimize your loader for traction and to work on paved surfaces.   
  •     
  • Synthetic, fire-resistant hydraulic fluid.

Steel Mill Operating Recommendations

Caterpillar recommends that Steel Mill machines be exposed to hot slag for less than 15 minutes each hour to allow for adequate cooling time between cycles. Typically, two machines per furnace and a backup machine for the site provide the best uptime. The timing, frequency and duration of the work and cooling cycles varies by job site, but exceeding the recommended exposure time will prevent the machine from meeting expected performance levels.

EQUIPMENT - Machine Modifications Include:

        
  • Heavy duty front guard and bottom guards    
  •     
  • Heavy duty laminated windshield glass    
  •     
  • Side bars welded on the track roller frame    
  •     
  • Metallic rings on low and high linkage    
  •     
  • Floating solid pin on lower bucket linkages    
  •     
  • High temperature seals in the equalizer bar, idlers, track rollers and final drives    
  •     
  • High temperature braiding on wiring harnesses    
  •     
  • Silicone material used on windshield, side windows and cab door seals, front baffles, front and rear wiper blades and door stoppers    
  •     
  • Thermal insulation of front guard, equalizer bar rubber pads, air cleaner hose, bottom guards, enclosure doors, fenders, lift cylinders heads, hydraulic tilt lines, hydraulic lift lines, hydrostatic lines, cab sound insulation, DEF lines, lift rotary sensor and lift linkage sensor    
  •     
  • Radiator guard with counterweights helps improve machine balance    
  •     
  • Fire resistant floormat   
  •     
  • Fuel spark arrester and pressure relief    
  •     
  • Cab door windows protected at bottom    
  •     
  • Additional metal roof on top of cab    
  •     
  • Metallic door handles and push-button release    
  •     
  • Manual brake release system located in the cab    
  •     
  • 8 heat-resistant lights

EQUIPMENT - Steel Mill Package Includes:

        
  • Visibility Kit, Double Camera    
  •     
  • Windshield Protection    
  •     
  • Tilt Cylinder Guard    
  •     
  • Lower Final Drive Abrasion Guard

EQUIPMENT - Requires:

        
  • Reversing Fan, Steel Mill
  •     
  • Metallic Turbine Precleaner on Engine Air Inlet
  •     
  • Tracks, Sealed & Non-Lubricated For Steel Mill
  •     
  • Ecosafe Hydraulic Oil
  •     
  • Steel Mill Cab
  •     
  • No Product Link
  •     
  • No Bumper
  •     
  • 3.0 m3 (4.0 yd3) Slag Bucket
  •     
  • Heavy Duty Bumper Counterweight

EQUIPMENT - Recommended Options:

        
  • Track Roller Guard, Steel Mill Arrangement
  •     
  • Final Drive Abrasion Guard
Note: A Partial Steel Mill package is available for Cat® 953K and 963K Track Loader models. The base package offers specialized seals and guarding, as well as machine features to allow dealer upgrades to your track loader for work in high-temperature conditions. The Partial Steel Mill package does not include modifications required to work in hot slag. Please consult with your Cat dealer for details.

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