988K
988K Wheel Loader
DESCRIPTION
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 at a lower cost per ton. 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.Meet the Pros: Randy Aneloski, Cat® Large Wheel Loaders
Cat® K Series Large Wheel Loader Operator Training
Cat® 988K & 988 XE Large Wheel Loader | Tire Slip Prevention - YouTube
Cat® 988K & 988 XE Large Wheel Loader | Lift Stall Prevention - YouTube
Cat® 988K & 988 XE Large Wheel Loader | Operator Coaching - YouTube
Cat® 988K & 988 XE Large Wheel Loader | Auto Set Tires - YouTube
Cat C18 Engine
The Cat C18 engine is built and tested to meet your most demanding applications while meeting Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II 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 operation.
- Reduced fuel consumption by up to 20% compared to the 988H.
Lift Arms
- Excellent visibility to the bucket edges and work area through a Z-bar design.
- 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.
Front Linkage
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.
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 Engine
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 Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent emission standards.
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.
Cat Comfort Series III Seat
Enhance comfort and helps 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.
Information Display
We have worked hard to help our customers and operators perform at their best through our newly upgraded touch screen information display.
- Intuitive operation and easy navigation with our enhanced user interface.
- Decrease service time by keeping operators informed about machine systems.
- Quick on-the-go weighing with the Cat Production Measurement.
Cat Product Link™
With the Product Link telematics system, you no longer have to rely on guesswork when managing your machine.
- Access information through the easy-to-use VisionLink® website.
- Optimization of the machine availability through constant accessible information about machine systems and diagnostic codes.
- Track machine health with overviews of productivity, fuel consumption and payload.
- Up-to-date information on machine location, operating hours and geopolitical jurisdiction.
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.
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.
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.
Reducing the Impact to the Environment
Sustainability is designed and built into our 988K's features.
- 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.
Efficient Combination
For full truck payloads with minimum loading time, an efficient loading/hauling system starts with a perfect match. Cat wheel loaders are matched with Cat off-highway trucks to maximize volume of material moved at the lowest operating cost per ton. The 988K equipped with the standard linkage will pass match the 770 (36 tonnes/40 tons) in 3 passes and the 772 (45 tonnes/50 tons) in 4 passes. Equipped with a high lift linkage the 988K is capable of loading a 773 (56 tonnes/61.7 tons) in 5 passes and the 775 (64 tonnes/70 tons) in 6 passes.
Rock Bucket
Applications: Face loading tightly compacted pit materials.
Data from customer machines show Cat wheel loaders are among the most fuel efficient machines in the industry. Several features contribute to this excellent fuel efficiency:
- Performance Series Buckets - Deliver faster fill times and better material retention, ultimately reducing cycle times while improving productivity and fuel efficiency.
- Positive Flow Control Hydraulics - Provides only the hydraulic flow required by the implement and steering systems for improved fuel efficiency and greater rimpull.
- Engine - Advanced engine controls maximizes power and efficiency.
- Economy Mode - Featuring On Demand Throttle, Economy Mode optimizes power for maximum fuel savings with minimal impact on production.
- Engine Idle Shutdown - Automatic engine and electrical system shutdown conserves fuel.
- Lock up Torque Converter - Transfers more power to the ground and optimizes fuel efficiency in all applications.
- Advanced Productivity Electronic Control Strategy (APECS) - All new APECS transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points. Machine configuration, operator technique, and job site layout can impact fuel consumption.
- Machine Configuration - Select the correct work tool and tire type based on machine application. Ensure proper inflation pressures. Utilize the Economy Mode setting for maximum efficiency.
- Job Site Layout - Spot loading targets in the right position. Avoid traveling more than 1.5 tire revolutions during truck loading cycles. Reduce transport distance for load and carry cycles by optimizing job site layout.
- Loading Bucket - Load in first gear. Raise and tilt bucket quickly and do not use a “pumping” motion. Avoid lift lever detent and use impeller clutch.
- Loading Truck or Hopper - Do not raise the work tool any higher than necessary. Keep engine rpm low and unload in controlled manner.
- Idle - Set the parking brake to engage Engine Idle Management System.
- Standard Equipment
- Optional Equipment
- Specs
- Docs
Standard Equipment
- NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
- ELECTRICAL
- 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
- OPERATOR ENVIRONMENT
- 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 minder
- 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
- POWER TRAIN
- 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, Aluminum Modular Radiator (AMR)
- 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
- Manual switch and automatic fuel priming
- Cat Production Measurement ready
- OTHER
- 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
Optional Equipment
- NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
- POWER TRAIN
- –50° C (–58° F) antifreeze
- Engine oil change system, high speed, Wiggins
- Engine block heater 120V or 240V
- High ambient cooling – software
- Cat Production Measurement
- OPERATOR ENVIRONMENT
- Cab precleaner
- AM/FM/CD/MP3 radio
- Satellite Sirius radio with bluetooth
- LED warning strobe
- CB radio ready
- Window pull down visor
- Handrail mounted mirrors
- MISCELLANEOUS ATTACHMENTS
- Front and rear roading fenders
- Fast fill fuel system (Shaw-Aero)
- Cold Weather Starting (extra starter plus two batteries)
- Aggregate Handler
Specs
Overview
Engine
Operating Specifications
Transmission
Hydraulic System - Lift/Tilt
Service Refill Capacities
Buckets
Axles
Brakes
Hydraulic System - Steering
Hydraulic Cycle Time (1,400-1,860 rpm)
Sound Performance - Tier 4 Final/Stage IV - Standard
Sound Performance - Tier 4 Final/Stage IV: Suppression
Sound Performance - Tier 2 Equivalent/Stage II: Suppression
Sound Performance - Tier 2 Equivalent/Stage II: Standard
Sound Performance - Tier 2 Equivalent/Stage II: Suppression
Service Refill Capacities
Sound Performance - Tier 2 Equivalent/Stage II: Standard
SEE HOW 988K COMPARES AGAINST FREQUENTLY COMPARED PRODUCTS.
- Brand
- Caterpillar
- Status
- Current
- Engine Model
- Cat® C18 ™
- Bore
- 5.7 in / 145 mm
- Stroke
- 7.2 in / 183 mm
- Displacement
- 1105 in³ / 18.1 l
- Torque Rise
- 58 % / 58 %
- Rated Speed
- 1700/min
- Net Power - SAE J1349
- 541 HP / 403 kW
- Peak Power Speed
- 1500/min
- Emissions
- U.S. EPA Tier 4 Final/EU Stage V OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
- Operating Weight
- 112574 lb / 51062 kg
- Transmission Type
- Cat-Planetenlastschaltgetriebe
- Relief Valve Setting - Lift/Tilt
- 4757 psi / 32800 kPa
- Lift/Tilt System - Circuit
- EH- Positive Flow Control, Flow Sharing
- Fuel Tank
- 188 gal (US) / 712 l
- Transmission
- 31.7 gal (US) / 120 l
- Differential - Final Drives - Rear
- 49.1 gal (US) / 186 l
- Differential - Final Drives - Front
- 49.1 gal (US) / 186 l
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13 °
- Brakes
- SAE J1473 OKT90, ISO 3450:1992
- Steering System - Pump
- Piston, variable displacement
- Total Steering Angle
- 86 °
- Steering Cycle Times - High Idle
- 3.4 s / 3.4 s
- Steering System - Circuit
- Pilot, load sensing
- Steering Cycle Times - Low Idle
- 5.6 s / 5.6 s
- Lower Float Down
- 3.5 s / 3.5 s
- Rack Back
- 4.5 s / 4.5 s
- Raise
- 8 s / 8 s
- Dump
- 2.2 s / 2.2 s
- Brand
- Cat
- Status
- Current
- Engine Model
- Cat® C18 ™
- Bore
- 5.7 in / 145 mm
- Stroke
- 7.2 in / 183 mm
- Displacement
- 1105 in³ / 18.1 l
- Torque Rise
- 58%
- Rated Speed
- 1,700 rpm
- Net Power - SAE J1349
- 538 HP / 401 kW
- Peak Power Speed
- 1,500 rpm
- Emissions
- U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
- Operating Weight
- 116362 lb / 52781 kg
- Transmission Type
- Cat switched reluctance electric drive
- Relief Valve Setting - Lift/Tilt
- 4757 psi / 32800 kPa
- Lift/Tilt System - Circuit
- EH-Positive Flow Control, Flow Sharing
- Fuel Tank
- 147 gal (US) / 555 l
- Transmission
- 16 gal (US) / 60 l
- Differential - Final Drives - Rear
- 49 gal (US) / 186 l
- Differential - Final Drives - Front
- 49 gal (US) / 186 l
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13°
- Brakes
- ISO 3450:2011
- Steering System - Pump
- Piston, variable displacement
- Total Steering Angle
- 86°
- Steering Cycle Times - High Idle
- 3.4 s / 3.4 s
- Steering System - Circuit
- Pilot, load sensing
- Steering Cycle Times - Low Idle
- 5.6 s / 5.6 s
- Lower Float Down
- 3.5 s / 3.5 s
- Rack Back
- 4.5 s / 4.5 s
- Raise
- 8 s / 8 s
- Dump
- 2.2 s / 2.2 s
- Brand
- Caterpillar
- Status
- Current
- Engine Model
- C18 Cat®
- Bore
- 5.7 in / 145 mm
- Stroke
- 7.2 in / 183 mm
- Displacement
- 1105 in³ / 18.1 l
- Torque Rise
- 58 % / 58 %
- Rated Speed
- 1700 r/min / 1700 r/min
- Net Power - SAE J1349
- 541 HP / 403 kW
- Peak Power Speed
- 1500 r/min / 1500 r/min
- Emissions
- Einhaltung von EPA Tier 4 Final (USA)/Stufe V (EU), Tier-2-konform
- Operating Weight
- 135602 lb / 61508 kg
- Transmission Type
- Cat-Planetenlastschaltgetriebe
- Relief Valve Setting - Lift/Tilt
- 4757 psi / 32800 kPa
- Lift/Tilt System - Circuit
- Pilot operated - EH control, flow sharing
- Fuel Tank
- 188.1 gal (US) / 712 l
- Transmission
- 31.7 gal (US) / 120 l
- Differential - Final Drives - Rear
- 49.1 gal (US) / 186 l
- Differential - Final Drives - Front
- 49.1 gal (US) / 186 l
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13 ° / 13 °
- Brakes
- SAE J1473 OKT90, ISO 3450:1992
- Steering System - Pump
- Piston, variable displacement
- Total Steering Angle
- 86 ° / 86 °
- Steering Cycle Times - High Idle
- 3.4 s / 3.4 s
- Steering System - Circuit
- Pilot, load sensing
- Steering Cycle Times - Low Idle
- 5.6 s / 5.6 s
- Lower Float Down
- 3.5 s / 3.5 s
- Rack Back
- 4.5 s / 4.5 s
- Raise
- 8 s / 8 s
- Dump
- 2.2 s / 2.2 s