990K Millyard Arrangement Wheel Loader
990K Millyard Arrangement Wheel Loader

Cat Large Wheel Loaders are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely. The 990K Millyard Arrangement is designed to meet the demands of millyard applications. The features of the 990K Millyard work together to provide a durable and reliable machine to meet the needs of the modern millyard.

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Net Power 699 HP
Engine Model Cat® C27 ™
Bore 5.4 in
Stroke 6 in
Displacement 1649.5 in³
Torque Rise 18 %
Rated Speed 1,800/min
Rated Speed - Gross - ISO 14396 752 HP
Gross - ISO 14396 752 HP
Net Power - SAE J1349 699 HP
Rated Speed - Net Power - SAE J1349 - Standard Ambient 699 HP
Rated Speed - Net Power - SAE J1349 - High Ambient 648 HP
Peak Torque - 1,200 rpm 2624 lb/ft
Rated Speed - Gross - SAE J1995 766 HP
Emissions U.S. EPA Tier 4 Final or Tier 2 equivalent
Operating Weight 202398 lb
Tipping Load - Straight 92990 lb
Tipping Load - Articulated 35° 81896 lb
Transmission Type Cat-Planetenlastschaltgetriebe
Forward - 1 4.5 mile/h
Forward - 2 8.3 mile/h
Forward - 3 14.2 mile/h
Reverse - 1 4.9 mile/h
Reverse - 2 9.1 mile/h
Reverse - 3 15.5 mile/h
Direct Drive - Forward 3 15.2 mile/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Reverse 3 16.4 mile/h
Direct Drive - Reverse 1 5.4 mile/h
Direct Drive - Reverse 2 9.6 mile/h
Direct Drive - Forward 2 8.5 mile/h
Note Travel speeds based on Michelin 45/65R39 LD D2**L5 tires.
Maximum Flow at 1,800 rpm (1) 216 gal/min
Lift/Tilt System - Circuit Positive flow control
Relief Valve Setting - Lift/Tilt 4786 psi
Maximum Flow at 1,800 rpm (2) 22.2 gal/min
Relief Valve Setting - Main 507 psi
Pilot System Open loop and pressure reducing
Lift/Tilt System Variable displacement piston
Cylinders, Double Acting - Tilt, Bore and Stroke 317.5 mm × 819 mm (12.5 in × 32.2 in)
Cylinders, Double Acting - Lift, Bore and Stroke 254 mm × 1264 mm (10.0 in × 49.8 in)
Raise 9.4 s
Dump 2.9 s
Lower Float Down 3.6 s
Lower 3.7 s
Rack Back 4.8 s
Fuel Tank 294.3 gal (US)
Cooling System 54.9 gal (US)
Transmission 29.1 gal (US)
Hydraulic Tank - Steering and Braking 34.9 gal (US)
Differential - Final Drives - Rear 68.9 gal (US)
Engine Crankcase 20 gal (US)
Differential - Final Drives - Front 71.6 gal (US)
Hydraulic Tank - Implement and Hydraulic Fan 68.9 gal (US)
Hydraulic System Factory Fill 210 gal (US)
Front Fixed
Rear Trunnion
Oscillation Angle 8.5°
Brakes SAE J1473 OKT90, ISO 3450:1992
Relief Valve Setting - Steering 4641 psi
Maximum Flow at 1,400 rpm 94.5 gal/min
Steering System - Circuit Pilot, load sensing
Total Steering Angle 70°
Steering System - Pump Piston, variable displacement
Machine Sound Level (ISO 6395:2008) 115 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 113 dB(A)
Ground to Top of Exhaust Stacks 16.6 ft
Fork Height at Maximum Lift 18.3 ft
Ground to Top of Hood 12.7 ft
Ground to Top of ROPS 17.2 ft
Fork Top Clamp Opening 12.3 ft
Maximum Overall Length 45.4 ft
Ground to Lower Hitch Clearance 2 ft
Ground to Bumper Clearance 3.1 ft
Fork Height with Level Arms 8.9 ft
Front Axle Centerline to Fork Tip 17.6 ft
Rear Axle - Centerline to Bumper 12.5 ft
Ground to Center of Front Axle 3.9 ft
Hinge Pin Height at Maximum Lift 19.4 ft
Wheel Base 15.1 ft
Dump Angle at Maximum Lift 29.3 degrees
Fork End Area 78 ft²

The Cat C27 engine is built and tested to meet your most demanding applications while meeting Tier 4 Final or Tier 2 equivalent emission standards.

  • Fully integrated electronic engine controls work in concert with the entire machine to make your fuel go farther.
  • Use less fuel idling with Engine Idle Shutdown.
  • Maximized durability with Delayed Engine Shutdown.

Maximize your uptime with the proven planetary power shift transmission. Improved shift quality, component life and operator comfort with our electronic transmission controls.

Enable your operators to maximize efficiency by varying machine rimpull while putting more horsepower to hydraulics.

  • Reduced tire wear
  • Enables full throttle shifts for faster cycle times
  • Provides smooth approach to the dump target for less spillage and faster cycle times.

  • Eliminates TC losses while lowering system heat
  • Improves travel speeds
  • Reduces cycle times in load and carry operations

Enabling maximum productivity and efficiency, all day every day. The 990K systems work hard to save you fuel through advanced technologies. Utilizing On Demand Throttle, operators maintain normal operation with the left pedal and implements while the 990K manages the engine speed.

  • Provides similar control and feel to our traditional throttle lock feature.
  • Efficiency of manual throttle and the ergonomics of throttle lock.

Your bottom line is improved by highly durable structures that achieve multiple life cycles and withstand the toughest loading conditions.

  • Full box-section rear frame resists torsional shock and twisting forces.
  • Heavy-duty steering cylinder mounts efficiently transmit steering loads into the frame.
  • Axle mounting has been optimized for increased structural integrity.

To ensure long life and reliability, the linkage pin joints feature a greased pin design with an auto lube system attachment available from the factory.

  • High load stresses are absorbed by the solid steel lift arms.
  • Enhance strength in key pin areas through the use of one piece castings.
  • Stress relieved lift arms increase durability and lengthen time to repair.

Experience maximum responsiveness and control with STIC that combines directional selection, gear selection and steering into a single lever.

  • Simple side-to-side motion turns machine right or left, minimizing operator movements.
  • Easy to operate finger controlled gear selection.
  • Smoother, faster cycles and less operator fatigue through the use of low effort integrated controls.

Building your success begins with a best-in-class transmission designed specifically for mining applications.

  • Consistent, smooth shifting and efficiency through integrated electronic controls.
  • Long life and reliability through heat treat gear and metallurgy.
  • Three forward and three reverse speeds to match your application.

Durability and efficiency at the heart of your 990K comes from the Cat C27 Engine. Optimum performance is built in through the use of a 12 cylinder, direct injection design.

  • Optimized performance and quick engine response with an electronic control module.
  • Reliable efficiency with complete control over injection timing, duration and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
  • Extended engine life and improved fuel efficiency with reduced rated speed.
  • Available in two versions: one that meets Tier 4 Final emission standards, and another that meets Tier 2 equivalent emission standards.

Lower your cost per ton utilizing advanced ICTC and RCS for modulated rimpull.

  • Reduce tire slippage and wear by modulating rimpull from 100 to 25 percent while depressing left pedal. After 25 percent rimpull is achieved the left pedal applies the brake.
  • Reduce the potential for wheel slippage without reducing hydraulic efficiency with RCS.
  • Improve fuel efficiency in certain applications with our lock-up clutch torque converter providing direct drive.

Increase efficiency through our Positive Flow Control (PFC) Hydraulic System. PFC has concurrent pump and valve control. By optimizing pump control, hydraulic oil flow is proportionate to implement lever movement.

  • Fast, productive cycles are enabled by the fully variable implement pump.
  • Increase fork feel and control through increased hydraulic response.
  • Consistent performance and efficiency with lower system heat.
  • Full hydraulic flow down to 1,400 engine rpm enabled by flow sharing technology.

Operators increase productivity with our responsive implements feature.

  • Operate comfortably through electronically controlled hydraulic cylinder stops.
  • Handle easy-to-use soft detent controls.
  • Conveniently set automatic implement kickouts from inside the cab.

Confident loader operation starts with precise machine control enabled by the 990K's load sensing hydraulic steering system.

  • Increase efficiency with our variable displacement piston pumps.
  • Achieve precise positioning for easy loading in tight areas with 35 degrees of steering articulation.
  • Enhance operator comfort with integrated steering and transmission control functions.

Benefit from extended performance and reliability of your hydraulic system with our advanced filtration system.

  • Case drain screens.
  • Hydraulic oil cooler return filter.
  • Pilot filter.
  • Return screens inside hydraulic tank.
  • Axle oil cooler screens if equipped.

Enter and exit the cab easily and safely with these newly designed, ergonomic features.

  • Fold up STIC steer/armrest.
  • Reduced access stairway angles.
  • Standard stairway lighting.

Enhance comfort and reduce operator fatigue with Cat Comfort Series III seat.

  • Mid back design and extra thick, contoured cushions.
  • Air suspension system.
  • Easy-to-reach seat levers and controls for six way adjustments.
  • Seat-mounted implement pod and STIC steer that moves with the seat.
  • 76 mm (3 in) wide retractable seat belt.
  • Optional heated and ventilated seat.

Ergonomic placement of switches and information display keep your operators comfortable all day every day.

  • Large backlit membrane switches feature LED activation indicators.
  • Switches feature ISO symbols for quick function identification.
  • Two position rocker switch activates the electro hydraulic park brake.

Your operator's productivity is enhanced with our clean, comfortable cab environment.

  • Experience reduced vibrations from isolation cab mounts and seat air suspension.
  • Maintain desired cab temperature with automatic temperature controls.
  • Pressurized cab with filtered air.
  • Sound level reduced to a quiet 69 dB(A).
  • Convenient floor storage tray/lunch box.

Cat Product link allows remote monitoring of equipment to improve overall fleet management effectiveness. Events and diagnostic codes, as well as hours, fuel, idle time and other information are transmitted to a secure web based application, VisionLink®. VisionLink includes powerful tools to convey information to users and dealers, including mapping, working and idle time, fuel level and more.

We have worked hard to help our customers and operators perform at their best through our Vital Information Management System (VIMS 3G).

  • Easy-to-view graphical information display features a large touch screen interface.
  • Intuitive operation and easy navigation with our enhanced user interface.
  • Decrease service time by keeping operators informed about machine system malfunction or operation.

  • Safe and convenient service with ground level or platform access and grouped service points.
  • Swing-out doors on both sides of the engine compartment provide easy access to important daily service checks.
  • Ecology drains for ease of service and spill prevention.
  • Reduce downtime with VIMS system notifications so your operators and technicians can resolve any problems before failure.
  • Ground level access to transmission control valves.

A valued partner, your Cat dealer is available whenever you need them.

  • Preventive maintenance programs and guaranteed maintenance contracts.
  • Best-in-class parts availability.
  • Improve your efficiency with operator training.
  • Genuine Cat Remanufactured parts.

  • Left and right hand stairs with 45 degree angle enhance safety for operators getting on and off the 990K.
  • Continuous walkway with non-skid surfaces are designed into the service areas.
  • Maintain three points of contact at all times through ground level or platform accessible service areas.

  • Optional heated mirrors ensure enhanced visibility for safe operation.
  • Standard Cat Vision or optional Cat Detect with radar increase operator awareness around the machine.
  • Optional HID or LED lights provide excellent workspace visibility.
  • Optional cab mounted LED warning beacons.

  • Reduced vibrations to the operator with isolated cab mounts and seat mounted implement and steering controls.
  • Low interior sound levels.
  • Pressurized cab with filtered air.
  • Safely train other operators in comfort with our standard training seat.
  • Standard 76 mm (3 in) seat belts on the operator seat and the standard trainer seat.

Sustainability is designed and built into our 990K's features.

  • Engine Idle Shutdown can help you save fuel by avoiding unnecessary idling.
  • The 990K is built for multiple lives. To assist with maximizing machine life, Caterpillar provides a number of sustainable options such as our Reman and Certified Rebuild programs. In these programs, reused or remanufactured components can deliver cost savings of 40 to 70 percent, which lowers operating cost.
  • Caterpillar offers retrofit packages to bring new features to older machines, maximizing your resource. And, when you go through the Cat Certified Rebuild program, these retrofit kits are part of the rebuild process.

Cat forks are designed for maximum productivity and durability. Whether unloading trucks in a single pass or reclaiming wood the high capacity forks bring productivity to your operation.

  • Bypassing style top clamp design to clasp full or partial truck loads.
  • Heavy duty top clamp design with durable mesh guarding to contain debris and protect the cab.
  • Pivoting tines with replaceable tips for efficient log reclaim.
  • Integrated front camera mounting location for maximum visibility to the tine tips for truck unloading.