New | 988K Block Handler Arrangement

Introduced in 1963, the 988 has been the industry leader for 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency. The Cat 988K Block Handler was designed to withstand the demanding and harsh environment of block handling applications. The features of the 988K Block Handler work together to provide a durable and reliable machine to meet your block handling needs.

Engine ModelCat® C18 ACERT™
Net Power541.0 hp
Bore5.7 in
Displacement1105.0 in3
EmissionsU.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Gross (ISO 14396)580.0 hp
Net Power - SAE J1349541.0 hp
Peak Power Speed1500.0 RPM
Peak Power Speed: Gross - ISO 14396580.0 hp
Peak Power Speed: Gross - SAE J1995588.0 hp
Peak Power Speed: Net Power - SAE J1349541.0 hp
Peak Torque @ 1,200 rpm2104.0 lb ft
Rated Speed1700.0 RPM
Stroke7.2 in
Torque Rise58.0 %
Operating Specifications
Operating Weight135602.0 lb
Hydraulic System - Steering
Maximum Flow74.0 gal/min
Relief Valve Setting - Steering4641.0 psi
Steering Cycle Time (high idle)3.4 Seconds
Steering Cycle Time (low idle)5.6 Seconds
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Total Steering Angle86.0 Degrees
Sound Performance - Standard
Exterior Sound Level111.0 dB(A)
Interior Sound Level71.0 dB(A)
Oscillation Angle13.0 Degrees
Hydraulic Cycle Time
Dump2.2 Seconds
Lower Float Down3.5 Seconds
Rack back4.5 Seconds
Raise8.0 Seconds
Total Hydraulic Cycle Time (empty bucket)18.2 Seconds
Direct Drive Forward 1Lock-up disabled
Direct Drive Forward 26.7 mph
Direct Drive Forward 311.9 mph
Direct Drive Forward 421.0 mph
Direct Drive Reverse 14.3 mph
Direct Drive Reverse 27.7 mph
Direct Drive Reverse 313.7 mph
Forward 13.6 mph
Forward 24.5 mph
Forward 311.4 mph
Forward 419.0 mph
Reverse 14.1 mph
Reverse 27.3 mph
Reverse 313.0 mph
Transmission TypeCat planetary power shift
Sound Performance - Suppression
Exterior Sound Level109.0 dB(A)
Interior Sound Level70.0 dB(A)
BrakesSAE J1473 OCT90, ISO 3450:1992
Hydraulic System - Lift/Tilt
Cylinders, Double Acting: Lift, Bore and Stroke235 mm × 976 mm (9.3 in × 38.4 in)
Cylinders, Double Acting: Tilt, Bore and Stroke291 mm × 671 mm (11.5 in × 26.4 in)
Lift/Tilt SystemVariable displacement piston
Lift/Tilt System - CircuitPilot operated - EH control, flow sharing
Maximum Flow @ 1,700 rpm13.7 gal/min
Maximum Flow at 1,400-1,860 rpm153.0 gal/min
Pilot SystemVariable displacement piston
Relief Valve Setting551.0 psi
Relief Valve Setting - Lift/Tilt4757.0 psi
Service Refill Capacities
Cooling System31.7 gal
Crankcase15.9 gal
Diesel Exhaust Fluid Tank8.7 gal
Differentials and Final Drives - Front49.1 gal
Differentials and Final Drives - Rear49.1 gal
Fuel Tank188.1 gal
Hydraulic System (factory fill)125.5 gal
Hydraulic System (tank only)63.4 gal
Transmission31.7 gal

Delivering fuel efficiency you demand through integrated machine systems.

Cat® C18 ACERT Engine

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

Cat Planetary Powershift Transmission

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.

Impeller Clutch Torque Converter (ICTC)

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.

Cat Torque Converter with Lock-up Clutch

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

Economy Mode

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.

Unique features for block handling applications.


The 988K Block Handler delivers stability and durability with an optimized counterweight for block handling applications.

High Rimpull Power Train

The 988K Block Handler is capable of moving the heaviest blocks out of your quarry pit. The high rimpull power train features a torque converter and transmission specially designed for this application to maximize rimpull.

Quick Coupler Activation

The Block Handler includes an additional hydraulic valve with the Quick Coupler, allowing the operator to switch work tools and immediately lock the work tool during load and carry applications.

Larger Tilt and Lift Cylinders

The 988K Block Handler comes equipped with larger tilt and lift cylinders on the linkage that help improve load control and ensure safe and long lasting operation.

Ride Control

Ride control works by using an accumulator to dampen the linkage motion, acting as a shock absorber. It provides the operator with a smoother ride over rough terrain, enabling a more comfortable ride at higher speeds.

Optimized Z-bar Linkage

  • Linkage layout designed to maximize lift capability in block handling application.
  • High load stresses are absorbed by solid steel lift arms.
  • Enhanced strength in key pin areas through the use of one piece castings.
  • Stress released lift arms increase durability and lengthen time to repair.

Move material more efficiently with improved power and control.

Steering and Transmission Integrated Control System (STIC™)

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.

Cat Planetary Powershift Transmission

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.

Cat C18 ACERT Engine

Durability and efficiency at the heart of your 988K comes from the Cat C18 ACERT 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, Tier 2 Equivalent emission standards.

Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS)

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.

Productivity enabling you to move more and make more.

Positive Flow Control Hydraulics

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.

Electro Hydraulic Controls

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.

Steering System

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.
  • Enhance operator comfort with integrated steering and transmission control functions.

Filtration System

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.

Best-in-class operator comfort and ergonomics.

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

Entry and Exit

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.

Cat Comfort Series III Seat

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.

Control Panel

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.

Greater productivity through Integrated Electronic Systems.

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™

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.

Enabling high uptime by reducing your service time.

We can help you succeed by ensuring your 988K has design features to reduce your downtime.

  • 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 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.

Your Cat dealers know how to keep your machines productive.

Legendary Cat Dealer 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.

Making your safety our priority.

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

Machine Access

  • Left and right hand stairs with 45 degree angle enhance safety for operators getting on and off the 988K.
  • 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 allow good visibility for safe operation in inclement weather.
  • 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.

Operator Environment

  • 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.
  • Standard 76 mm (3 in) seat belts on the operator seat.

Work tool options to meet your needs.

(1) Quick Coupler

The quick coupler is designed for optimal utilization of lifting and break-out forces with Cat cylinder, safety valves, pressure and isolating valves, safety covers and lock indicators. It has enhanced visibility and has been optimized for handling large rocks and blocks.

(2) Breaker Tine

Center-mounted, heavy-duty single-piece forged fork tine is used for prying loose large stone blocks. It is built with an extra thick tine to handle a variety of materials in this demanding application.

(3) Forks

Heavy-duty pallet forks are engineered to handle weight and load stress when maneuvering and placing blocks in quarry operations. Dual tine forks are designed to allow blocks to be placed close to the machine for greater balance and safe handling.

(4) Clearing Rake

Used primarily for clearing and controlling loose objects at the quarry face and working levels, the block handling rake is designed with a curved boom for enhanced operator visibility and object placement.

(5) Rock Bucket

Heavy-duty bucket offers superior durability, protection and performance in rock and overburden operations in block quarries. It includes large size teeth and segments. Its HD400 (high wear resistant) metal shell and bottom offer maximum strength, durability and wear life.

(6) Marble Bucket

Special bucket construction including the HD400-metal shell and bottom help the bucket effectively load large blocks and boulders while maintaining durability. The corner teeth ease block tilting and handling. The heavy-duty V-edge is particularly suited for handling high-value breakable marbles before cutting operations.

(7) Block Bucket Heavy-Duty

Special bucket construction loads very large squared blocks and boulders. The deep carved sides and extra long heavy-duty bottom allow the special V-edge to penetrate under large blocks. The interior bucket profile allows blocks to further fit back in the bucket for increased load and lift capabilities and better balance and rack-back. Its HD400-metal shell and bottom offers maximum strength, durability and wear life.

  • Alarm, back-up
  • Alternator, single 150 amp
  • Batteries, dry
  • Converter, 10/15 amp, 24V to 12V
  • Lighting system (halogen, work lights, access and service platform lighting)
  • Starting and charging system, 24V
  • Starter emergency start receptacle
  • Starter lockout in bumper
  • Transmission lockout in bumper
  • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
  • Air conditioner
  • Cat Detect Vision, rear vision camera system
  • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
  • Controls, lift and tilt function
  • Heater, defroster
  • Horn, electric
  • Instrumentation, gauges: - Coolant temperature - Engine hour meter - Hydraulic oil temperature - Power train oil temperature
  • Light, cab, dome
  • Lunchbox, beverage holders
  • Mirrors, rearview (externally mounted)
  • Rimpull Control System
  • Seat, Cat Comfort (cloth), air suspension, six-way adjustable
  • Seat belt, retractable, 76 mm (3 in) wide
  • STIC Control System
  • UV glass
  • Transmission gear indicator
  • Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
  • Wet-Arm wipers/washers (front and rear): - Intermittent front and rear wipers
  • Lights, directional
  • Brakes, oil-cooled, multi-disc, service/secondary
  • Case drain screens
  • Crankcase guard
  • Electro hydraulic parking brake
  • Engine, C18 MEUI diesel, turbocharged/aftercooled
  • Ground level engine shutoff
  • Turbine precleaner, engine air intake
  • Radiator, Next Generation Modular (NGMR)
  • Starting aid, ether, automatic
  • Throttle lock, electronic
  • Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
  • Transmission, planetary powershift, 4F/3R electronic control
  • Automatic bucket lift kickout/positioner
  • Base machine price includes a rim allowance
  • Hydraulically driven demand fan
  • Couplings, Cat O-ring face seals
  • Doors, service access (locking)
  • Ecology drains for engine, radiator, hydraulic tank
  • Fuel tank, 731 L (188 gal)
  • Hitch, drawbar with pin
  • Hoses, Cat XT™
  • Hydraulic, steering and brake filtration/screening system
  • Cat Clean Emission Module
  • Oil sampling valves
  • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
  • Rear access to cab and service platform
  • Steering, load sensing
  • Toe kicks
  • Vandalism protection caplocks






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