988K Large Wheel Loader - Millyard Arrangement

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METRIC

988K Millyard Arrangement

OVERVIEW

BENEFITS

FEATURES AT A GLANCE

SPECIFICATIONS

TOOLS AND EXPERT HELP

PRODUCT BROCHURES AND DOWNLOADS

MEDIA GALLERY

KEY SPECS

Net Power 403.0kW541.0hp
Engine Model Cat® C18 ™
Net Power - SAE J1349 403.0kW541.0hp

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OVERVIEW

FEATURES AT A GLANCE

POWERFUL EFFICIENCY

The Cat C18 engine is built and tested to meet your most demanding applications while meeting U.S. EPA Tier 4 Final/EU Stage IV Technology, Tier 2 Equivalent emission standards.

Fully integrated electronic engine controls works 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.

Featuring all new Advanced Productivity Electronic Control Shifting (APECS) transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points.

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 988K 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 988K 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.
Reduced fuel consumption by up to 20% compared to the 988H.

LONG TERM VALUE AND DURABILITY

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.
Lower hitch pin, frame plate, and bearing size have been increased for longer life.

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.

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.

PROVEN RELIABILITY

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 that utilize Advanced Productivity Electronic Control Strategy (APECS).
Long life and reliability through heat treat gear and metallurgy.
Four forward and three reverse speeds to match your application.

Durability and efficiency at the heart of your 988K comes from the Cat C18 Engine. Optimum performance is built in through the use of a 6 cylinder, four-stroke 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.
Designed to meet U.S. EPA Tier 4 Final/EU Stage IV emission standards, 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.

PERFORMANCE AND PRODUCTIVITY

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 bucket 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 988K's load sensing hydraulic steering system.

Increase efficiency with our variable displacement piston pumps.
Achieve precise positioning for easy loading in tight areas with 37 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.

OPERATOR COMFORT AND CONTROL

Your operators can work more efficiently and stay comfortable with our customer-inspired cab features. 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.

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 71 dB(A).
Convenient floor storage tray/lunch box.

PRODUCTIVITY WITH TECHNOLOGY

The 988K electronic systems have been completely integrated to function as one machine. This integration creates a smart machine and more informed operator, maximizing the productivity of both. 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.

SAVE ON SERVICE AND MAINTENANCE

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.
Swing-out radiator system with 6 fins per inch cores for easier cleaning.
Auto-reversing fan to keep the cooling system clear of debris.
Ecology drains for ease of service and prevention of spilling potential environmental contaminants.
Reduce downtime with VIMS system notifications so your operators and technicians can resolve any problems before failure.
Ground level access to transmission control valves.

TOP-TIER SERVICE AND SUPPORT

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.

SAFETY FIRST

We are constantly improving our products in an effort to provide a productive and safe work environment for the operator and those who work on your job site.

Left and right hand stairs with 45 degree angle allow operators to safely get on and off the 988K.
Continuous walkway with metallic 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 good 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 down to 70 dB(A) on standard machine.
Pressurized cab with filtered air.
Standard 76 mm (3 in) seat belts on the operator seat.

REDUCE ENVIRONMENT IMPACT

The 988K is designed to maximize efficiency and productivity while conserving natural resources.

Burns up to 20% less fuel than the previous model to minimize your carbon footprint.
Engine Idle Shutdown can help you save fuel by avoiding unnecessary idling.
Reduce waste with our maintenance free batteries.
Built for multiple lives, the Cat 988 is one of the most rebuilt products. 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 while benefiting the environment.
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.

OPTIONS TO MEET YOUR NEEDS

Available for both the 988H and 990H, Millyard and Logging Forks are designed to move wood in the millyard. Woodchip Buckets are designed with performance characteristics to bring productivity and fuel efficiency to load-and-carry work in the yard. A single top clamp closes down between the tines, allowing individual logs to be picked and placed with ease. An open, high visibility design allows operators to see the job at hand, work faster and more efficiently. Dual top clamps close down to the tine tips, their curvature maximizes carry capacity. Built to match the task of unloading trucks. An open, high visibility design allows operators to see the job at hand, work faster and more efficiently.

Extra capacity and loading characteristics make this bucket style perfect for handling woodchips. Available in direct pin on models or for use with the Cat Quick Coupler System.

Dual top clamps are connected to allow maximum capacity while still closing between the tines allowing partial loads to be handled.

SPECIFICATIONS

Net Power 403.0kW541.0hp
Engine Model Cat® C18 ™
Net Power - SAE J1349 403.0kW541.0hp
Bore 145.0mm5.7in
Stroke 183.0mm7.2in
Displacement 18.1l1105.0in³
Torque Rise 58.0%58.0%
Rated Speed 1700/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 432.0kW580.0hp
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 403.0kW541.0hp
Emissions U.S. EPA Tier 4 Final/EU Stage V Technology or Tier 2 Equivalent
Peak Torque - 1,200 rpm 2852.0N·m2104.0lb/ft
Gross - ISO 14396 432.0kW580.0hp
Peak Power Speed 1500/min
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 439.0kW588.0hp
Fork End Area 6.4m²69.0ft²
Operating Weight 63600.0kg139920.0lb
Tipping Load - Straight 35500.0kg78115.0lb
Tipping Load - Articulated 37° 30910.0kg68005.0lb
Transmission Type Cat-Planetenlastschaltgetriebe
Forward - 1 6.5km/h4.0mile/h
Forward - 2 11.6km/h7.2mile/h
Forward - 3 20.4km/h12.7mile/h
Forward - 4 34.7km/h21.6mile/h
Reverse - 1 7.5km/h4.7mile/h
Reverse - 2 13.3km/h8.3mile/h
Reverse - 3 23.2km/h14.4mile/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 2 12.5km/h7.8mile/h
Direct Drive - Forward 3 22.3km/h13.9mile/h
Direct Drive - Forward 4 39.3km/h24.4mile/h
Direct Drive - Reverse 1 8.0km/h5.0mile/h
Direct Drive - Reverse 2 14.3km/h8.9mile/h
Direct Drive - Reverse 3 25.5km/h15.8mile/h
Maximum Flow 52.0l/min13.7gal/min
Pilot System Variable displacement piston
Maximum Flow at 1,400-1,860 rpm 580.0l/min153.0gal/min
Relief Valve Setting - Main 4000.0kPa580.0psi
Cylinders, Double Acting - Tilt, Bore and Stroke 292 mm × 671 mm (11.5 in × 26.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke 235 mm × 976 mm (9.25 in × 38.4 in)
Lift/Tilt System Variable displacement piston
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt 32000.0kPa4641.0psi
Fuel Tank 712.0l188.0gal (US)
Cooling System 120.0l31.7gal (US)
Crankcase 60.0l15.9gal (US)
Transmission 120.0l31.7gal (US)
Differential - Final Drives - Front 186.0l49.1gal (US)
Differential - Final Drives - Rear 186.0l49.1gal (US)
Hydraulic System - Tank Only 240.0l63.4gal (US)
Hydraulic System Factory Fill 475.0l125.5gal (US)
Diesel Exhaust Fluid Tank 33.0l8.7gal (US)
Fork Top Clamp Opening 3741.0mm12.3ft
Dump Angle at Maximum Lift 39.4°39.4°
Ground to Top of Hood 3334.0mm10.9ft
Front Axle Centerline to Fork Tip 4765.0mm15.6ft
Fork Height at Maximum Lift 4660.0mm15.3ft
Wheel Base 4550.0mm14.9ft
Ground to Lower Hitch Clearance 568.0mm1.9ft
Rear Axle - Centerline to Bumper 3187.0mm10.5ft
Ground to Center of Front Axle 978.0mm3.2ft
Maximum Overall Length 12502.0mm41.0ft
Ground to Top of ROPS 4221.0mm13.8ft
Fork Height with Level Arms 2468.0mm8.1ft
Ground to Bumper Clearance 933.0mm3.1ft
Hinge Pin Height at Maximum Lift 4918.0mm16.1ft
Ground to Top of Exhaust Stacks 4214.0mm13.8ft
Front Fixed
Rear Trunnion
Oscillation Angle 13°
Brakes SAE J1473 OKT90, ISO 3450:1992
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Relief Valve Setting - Steering 30000.0kPa4351.0psi
Steering Cycle Times - High Idle 3.4s3.4s
Steering Cycle Times - Low Idle 5.6s5.6s
Maximum Flow 270.0l/min71.3gal/min
Total Steering Angle 74.0°74.0°
Operator Sound Level (ISO 6396) 71.0dB(A)71.0dB(A)
Machine Sound Level (ISO 6395) 111.0dB(A)111.0dB(A)
Machine Sound Level (ISO 6395) 109.0dB(A)109.0dB(A)
Operator Sound Level (ISO 6396) 70.0dB(A)70.0dB(A)