973K Track Loader – Steel Mill Configuration

973K Track Loader – Steel Mill Configuration

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.

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Flywheel Power
Engine Model
Cat C9.3 ACERT™
U.S. EPA Tier 4 Final/EU Stage IV/Korea Tier 4
Engine Power - Maximum - SAE J1995
Engine Power - Maximum - ISO 14396
Engine Power - Maximum - ISO 14396 (DIN)
Net Power (Rated) - ISO 9249/SAE J1349
Net Power (Rated) - ISO 9249/SAE J1349 (DIN)
Note (1)
Engine ratings at 1,800 rpm.
Note (2)
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
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.


Operating Weight
Operating Weight - Steel Mill
Shipping Weight - Steel Mill
Steel Mill weights are with new slag bucket.


Capacity - General Purpose
Capacity - Slag
Width - Slag


Track Shoe Type
Heavy Duty Sealed and Non Lubricated - Steel Mill, Double Grouser
Track Shoe Width - Standard
Track Rollers - Each Side
Number of Shoes - Each Side
Track on Ground
Ground Contact Area (ISO 16754:2008): Steel Mill Shoe - 500 mm (19.7 in)
Ground Pressure* (ISO 16754:2008): Steel Mill Shoe - 500 mm (19.7 in)
Grouser Height - Double Grouser
Track Gauge
Link Pitch
* Calculated using Steel Mill operating weight with Slag Bucket.

Service Refill Capacities

Fuel Tank
101.5gal (US)
Cooling System
11.6gal (US)
DEF Tank
9.2gal (US)

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.


ROPS (Rollover Protective Structure) offered by Caterpillar for the machine meets ROPS criteria ISO 3471:2008.
FOPS (Falling Object Protective Structure) meets ISO 3449-2005 Level II.
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 diffe
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.
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 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).


Overall Machine Width without Bucket: Steel Mill Tracks - 500 mm (19.7 in) Shoes
Overall Machine Width with Slag Bucket: Steel Mill Tracks - 500 mm (19.7 in)
Ground Clearance
Machine Height - Top of Cab
Length - Front of Track
Overall Machine Length*
Carry Position Approach Angle
Digging Depth*
Maximum Rollback - Ground/Carry Position
Bucket Height - Carry Position
Reach at Full Lift Height and 45° Dump*
Clearance at Full Lift Height and 45° Dump*
Maximum Rollback/Dump - Fully Raised
Grading Angle
Height - Bucket Hinge Pin
Overall Machine Height - Bucket Fully Raised
Height to Top of the Seat with Headrest
Height - Top of Stack
Ramp Angle
*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.

Standard Equipment

  • Power Train
    • Cat C9.3 ACERT diesel engine
    • Engine mounted aftertreatment to meet Tier 4 Final/Stage IV/Korea Tier 4 Final emission standards
    • Turbocharged with ATAAC
    • Modular cooling system for engine air intake, oil and water
    • Radiator fan, electronically controlled, hydraulically driven, temperature sensing, on demand
    • Electro Hydrostatic Control (EHC) for transmission with travel and work modes
    • Fuel cooler
    • Water separator
    • Air cleaner dry-type, axial seal with integral precleaner and dust ejection system, electronic filter condition indicator
    • Caterpillar extended life coolant
  • Undercarriage
    • Caterpillar heavy duty tracks
    • Track guiding guards, end section
    • Track adjuster, hydraulic
    • Sprocket rims, with replaceable bolt-on tough steel segments
    • Guards, sprocket
    • Seven track rollers, two upper carrier rollers per track, lifetime lubricated
    • Idlers, conventional type, lifetime lubricated
    • Oscillating track roller frames
    • Track master link
  • Electrical
    • Alternator, 24 volt, heavy duty brushless
    • Backup alarm
    • Electric horn
    • Two heavy duty batteries, high output, maintenance free 1,400 CCA
    • Switch, main disconnect
    • Starter, electric (heavy duty, 24 volt)
  • Operator Environment
    • Pressurized, sound suppressed, ROPS/FOPS cab with sealed front windshield, tinted glass and right side sliding window
    • Air conditioning and heating
    • Heater/defroster with automatic temperature control
    • Electro Hydraulic, seat mounted control levers
    • Seat belt, retractable, with buckling indicator on dash
    • Electronic Monitoring System with gauges for: Engine coolant temperature, Hydraulic oil temperature, Fuel Level, Diesel Exhaust Fluid level (when equipped)
    • Mirror, rearview, inside adjustable
    • Radio ready: Includes 24 to 12 volt converter, speakers, antenna and two 12V power outlets
    • Coat hook
    • Storage compartments under left armrest
    • Document holder on right console
    • Floor mat, rubber, heavy duty
    • Windshield washers and wipers, multiple speed front and rear
    • Durable metal roof
    • Parking brake switch and "brake-on" indicator light
  • Other Standard Equipment
    • Sond suppression, exterior
    • Z-bar loader linkage
    • Load sensing variable displacement implement pump
    • Implement cylinders with position sensors
    • Operator programmable lift and tilt kickouts
    • Enginen enclosure with lockable doors
    • Radiator core 6.5 fins-per-inch, debris resistant
    • Hinged radiator guard and swing out fan
    • Full bottom guards
    • Lift cylinder guards
    • Oil gauge guard
    • Product Link ready
    • Oil sampling valves
    • Cat XT hoses
    • HYDO Advanced 10

Optional Equipment

  • Power Train
    • Engine thermal shield
    • Fan, basic
    • Fan, reversing
    • Fan, reversing, low speed
    • Fan, reversing, Steel Mill
    • Air inlet, preclenaer turbine
  • Operator Environment
    • Cab
    • Deluxe cab
    • Steel Mill cab
    • Seat, cloth, air suspension, no side-to-side isolator
    • Seat, cloth, air suspension, heated, side-to-side isolator
    • Transmission control, V-lever or joystick
    • Visibility kit - single camera
    • Visibility kit - double camera
    • Radio, AM/FM/AUX/USB/Bluetooth
    • Cab air precleaner
  • Hydraulics
    • Hydraulic oil, biodegradable
    • Hydraulic oil, EcoSafe
    • Hydraulics Packages: General purpose - Two-valve joystick, Three-valve joystick, Two-valve, two levers, Three valves, two levers; Multi-Purpose - Three-valve joystick, Four-valve joystick
  • Guards
    • Tilt cylinder guards
    • Guard, front lights
    • Windshield protection
    • Final drive abrasion guard
    • Final drive abrasion guard, lower
  • Electrical
    • Rotating beacon
  • Undercarriage
    • Track roller guard
    • Track roller guard, Steel Mill
    • Track Groups (40 sections) - Heavy Duty Track Groups - Sealed and Lubricated: 500 mm (19.7 in) double grouser, center hole; 510 mm (20.1 in) extreme service, single grouser, center hole; 550 mm (21.6 in) double grouser; 675 mm (26.6 in) double grouser; 675 mm (26.6 in) double grouser, center hole; 675 mm (26.6 in) single grouser, center hole; 830 mm (32.7 in) double grouser, wide gauge
    • Track Groups (40 sections) - Heavy Duty Track Groups - Sealed and Non-Lubricated - Steel Mill: 500 mm (19.7 in) double grouser; 500 mm (19.7 in) flat; 500 mm (19.7 in) triple grouser; 500 mm (19.7 in) alternate flat shoe
  • Buckets
    • General Purpose: 3.0 m³ (4.0 yd³), welded flush adaptors; 3.2 m³ (4.2 yd³), pin on; 3.2 m³ (4.2 yd³), heavy duty, pin on; 3.2 m³ (4.2 yd³), heavy duty, full edge, pin on; 4.2 m³ (5.5 yd³), Performance Series; 4.0 m³ (5.2 yd³), Performance Series flush
    • Multi-Purpose: 3.0 m³ (4.0 yd³), heavy duty, pin on; 3.0 m³ (4.0 yd³), pin on
    • Wide: 4.2 m³ (5.5 yd³), Performance Series
    • Landfill: 4.6 m³ (6.0 yd³), multi-purpose landfill, heavy duty, pin on; 4.9 m³ (6.4 yd³), general purpose landfill, heavy duty, pin on
    • Steel Mill: 3.0 m³ (4.0 yd³), slag bucket
  • Other Attachments
    • Counterweight
    • Counterweight, heavy duty bumper
    • Ripper, multi-shank
    • Hitch, ripper
    • Striker bars, rear
    • Bumper, standard
    • No bumper
    • Rear step, standard
    • Rear step, ripper
    • Additional work tools: Quick coupler, Blades, Forks, Material handling arms, Rakes
  • Starters, Batteries And Alternators
    • Engine coolant heater, 120V
    • Engine coolant heater, 240V
  • Maintenance And Related Attachments
    • Maintenance package, deluxe
    • High speed oil change
    • Sediment pump
    • Fuel tank refueling pump
    • Service package, standard
    • Locking bar that holds cab at 30 degrees safely, front windshield
    • Service package, extended: Manual hydraulic system enabling cab tilt and lock at 30 degrees safely in the field; Shovel holder (shovel not included)
    • Antifeeze -50 degrees Celcius (-58 degrees Fahrenheit)
  • Technology Products
    • Product Link - Satellite
    • Product Link - Cellular
    • Grade control mast