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 over 60 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988 XE brings improved sustainability and maximum efficiency to this machine platform.
Net Power – SAE J1349
401 kW
Engine Power – ISO 14396
432 kW
Engine Model
Cat® C18 ™
Product specifications for 988 XE Large Wheel Loaders
Engine
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Net Power – SAE J1349
401 kW
Engine Power – ISO 14396
432 kW
Engine Model
Cat® C18 ™
Gross Power – SAE J1995
439 kW
Rated Speed
1,700 rpm
Peak Power Speed
1,500 rpm
Emissions
U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Bore
145 mm
Stroke
183 mm
Displacement
18.1 l
Peak Torque – 1,200 rpm – SAE J1995
3023 N·m
Torque Rise
58%
Operating Specifications
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Operating Weight
52781 kg
Operating Weight – Standard
52781 kg
Operating Weight – High Lift
54258 kg
Rated Payload – Standard (Quarry Face)
11.3 t
Rated Payload – Loose Material (Standard)
14.5 t
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Transmission
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Transmission Type
Cat switched reluctance electric drive
Forward 1 (virtual)
7 km/h
Forward 2 (virtual)
11.3 km/h
Forward 3 (virtual)
22.2 km/h
Forward 4 (virtual)
32.1 km/h
Reverse 1 (virtual)
7 km/h
Reverse 2 (virtual)
11.3 km/h
Reverse 3 (virtual)
28.2 km/h
Hydraulic System – Lift/Tilt
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Lift/Tilt System – Circuit
EH-Positive Flow Control, Flow Sharing
Lift/Tilt System – Pump
Variable displacement piston
Maximum Flow at 1,400-1,600 rpm
580 l/min
Relief Valve Setting – Lift/Tilt
32800 kPa
Lift Cylinder – Bore
210 mm
Lift Cylinder – Stroke
1050 mm
Tilt Cylinder – Bore
269 mm
Tilt Cylinder – Stroke
685 mm
Hydraulic Cycle Times
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Rack Back
4.5 s
Raise
8 s
Dump
2.2 s
Lower Float Down
3.5 s
Total Hydraulic Cycle Time
18.2 s
Hydraulic System – Steering
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Steering System – Circuit
Pilot, load sensing
Steering System – Pump
Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm
270 l/min
Steering Cut Off Pressure
30000 kPa
Total Steering Angle
86°
Steering Cycle Times – High Idle
3.4 s
Steering Cycle Times – Low Idle
5.6 s
Air Conditioning System
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Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
Axles
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Front
Fixed
Rear
Trunnion
Oscillation Angle
13°
Brakes
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Brakes
ISO 3450:2011
Operator’s Cab
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ROPS/FOPS
ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Service Refill Capacities
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Fuel Tank
555 l
Cooling System – Jacket Water
112 l
Cooling Systems – Power Train
30 l
Engine Crankcase
60 l
Diesel Exhaust Fluid Tank
33 l
Transmission
60 l
Differential – Final Drives – Front
186 l
Differential – Final Drives – Rear
186 l
Hydraulic System – Implement/Steering
475 l
Note
All nonroad Tier 4 Final/Stage V diesel engines are required to use: – The machine has the flexibility to run on either ultra-low-sulfur diesel fuel (ULSD with 15 ppm of sulfur or less). – Cat engines are compatible with the following renewable, alternative, and biodiesel* fuels that reduce greenhouse gases: Up to B20 biodiesel (FAME) ** Up to 100% HVO and GTL renewable fuels * Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Only use DEF that meets ISO 22241-1 standards.
Sound Performance – Tier 4 Final/EU Stage V – Standard
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Operator Sound Level (ISO 6396)
72 dB(A)
Machine Sound Level (ISO 6395)
109 dB(A)
Note (1)
The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (2)
Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.
Note (3)
The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Dimensions (Approximate) – Standard Lift
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Ground to Top of ROPS
4202 mm
Ground to Top of Exhaust Stacks
4498 mm
Ground to Top of Hood
3334 mm
Ground to Bumper Clearance
933 mm
Rear Axle – Centerline to Bumper
3187 mm
Front Axle Centerline to Bucket Tip
14 mm
Wheel Base
4550 mm
Maximum Overall Length
11991 mm
Ground to Lower Hitch Clearance
568 mm
Ground to Center of Axles
978 mm
Clearance at Maximum Lift
3641 mm
B-Pin Height – Maximum Lift
5479 mm
Maximum Overall Height – Bucket Raised
7455 mm
Reach – Maximum Lift
1981 mm
Note
Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height.
Dimensions (Approximate) – High Lift
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Ground to Top of ROPS
4202 mm
Ground to Top of Exhaust Stacks
4498 mm
Ground to Top of Hood
3334 mm
Ground to Bumper Clearance
933 mm
Rear Axle – Centerline to Bumper
3187 mm
Front Axle Centerline to Bucket Tip
4661 mm
Wheel Base
4550 mm
Maximum Overall Length
12398 mm
Ground to Lower Hitch Clearance
568 mm
Ground to Center of Axles
978 mm
Clearance at Maximum Lift
4043 mm
B-Pin Height – Maximum Lift
5881 mm
Maximum Overall Height – Bucket Raised
7849 mm
Reach – Maximum Lift
2062 mm
Note
Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height.
Dimensions – Millyard Linkage
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Ground to Top of ROPS
4221 mm
Ground to Top of Exhaust Stacks
4214 mm
Ground to Top of Hood
3334 mm
Ground to Bumper Clearance
933 mm
Rear Axle – Centerline to Bumper
3187 mm
Front Axle Centerline to Fork Tip
5023 mm
Wheel Base
4550 mm
Maximum Overall Length
12761 mm
Ground to Lower Hitch Clearance
568 mm
Ground to Center of Front Axle
978 mm
Fork Height with Level Arms
2474 mm
Fork Top Clamp Opening
4006 mm
Fork Height at Maximum Lift
5242 mm
Hinge Pin Height at Maximum Lift
4918 mm
Dump Angle at Maximum Lift
-39.4 °
Buckets
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Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Sustainability
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Recyclability
96%
PROVEN RELIABILITY
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Proven Reliability
With 15+ years of electric-drive experience, the 988 XE combines the simple and robust switched reluctance technology with existing 988 proven machine design.
More than 90 percent identical to the market leader, the 988.
Fewer moving parts than traditional torque converter and mechanical transmission systems.
Solid-state, fully sealed, and liquid-cooled powered electronics maximize durability in extreme conditions.
Moves more material more efficiently with improved power and control.
Cat C18 engine is built and tested to meet your most demanding applications.
Advanced filtration system for extended performance and reliability of the hydraulic system.
LONG TERM VALUE AND DURABILITY
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Durability
Achieves longer engine life and improved fuel efficiency with reduced high idle speed.
Automatic retarder controls maintain speed on grade.
One-piece castings provide enhanced front linkage strength in key pin areas.
Full box section rear frame resists torsional shock and twisting forces.
Durable construction withstands the toughest loading conditions and multiple life cycles.
Achieves longer brake life while operating in single pedal with dynamic braking mode.
ACHIEVE GREATER PRODUCTIVITY
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Achieve Greater Productivity
Electric-drive system eliminates shifting and simplifies operator control, accelerating the learning curve of new operators.
Superior acceleration, smoother directional shifts, and reduced travel times.
Maximum responsiveness with Steering and Integrated Control (STIC™).
Convenient, responsive electro-hydraulic controls increase operator productivity.
Superior digging, higher bucket fill factors, and reduced dig times.
Up to 10 percent more payload per pass, higher efficiency, and improved pass match.
Improved visibility over the top of the linkage.
POWERFUL EFFICIENCY
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Superior Fuel Efficiency
Up to 25 percent better fuel efficiency overall.
Up to 49 percent more fuel efficiency in truck loading applications.
Greenhouse gas reductions up to the equivalent of 1 year of electricity use for nearly 10 homes.
Continuously variable speed control up to maximum ground speed.
Positive Flow Control (PFC) hydraulic system increases efficiency, bucket feel, and responsiveness with consistent performance.
Economy mode provides 100% ECM managed engine speed to provide the most fuel efficient required RPM during machine operation.
Fully integrated electronic engine controls make your fuel go farther.
Engine idle shutdown for less fuel used while idling.
Flow sharing hydraulics for full‑flow at reduced engine rpm.
Increased hydraulic speed and faster cycle times for decreased idle, decreased fuel burn, and increased efficiency.
PRODUCTIVITY WITH TECHNOLOGY
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Increase Productivity and Efficiency with Integrated Technologies
Cat Technologies developed to monitor, manage, and enhance your jobsite operations.
Cat Payload provides accurate weighing* of the materials you are loading and hauling. Payload data is displayed in real-time to improve productivity and reduce overloading.
Cat Detect enhances awareness of the environment around working equipment and provides alerts to help keep people and assets safe on the jobsite.
Product Link™ wirelessly connects you to your equipment, giving you access to essential information you need to know to run your business.
Gain valuable insight into how your machine or fleet is performing.
Optional Advanced Productivity subscription provides comprehensive actionable information to help you manage and improve the productivity and profitability of your operations.
Improved cycle times and better bucket fill factors with optional Operator Coaching.
Up to 10% dig segment cycle optimization with optional Operator Assist features.
Easier to operate in single pedal with dynamic braking and operator assist features that allow faster training of new operators.
Increase operator efficiency with Operator Coaching through onboard tips for truck loading operations.
*Not legal for trade.
SAFETY FIRST
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Safety Features
Operator presence sensing automatically engages the parking brake if the machine detects movement without an operator on the seat.
External operator seat belt beacon indicates when the seat belt is not being used by the operator.
Standard LED lights provide a safer work environment while operating in dark conditions.
Hazardous voltage lamp assures electric drive system is de-energized and machine is safe to work on.
Achieve precise positioning for easy loading in tight areas with 43 degrees of steering articulation.
Precise machine control by load-sensing hydraulic steering system.
Reduced stairway angles and standard stairway lighting provide reduced risk of slips, trips, and falls due to better visibility of the steps and stairway.
Left- and right-hand stairs with 45-degree angle.
Computerized monitoring system with warning indicators.
Standard Cat Vision enhances visibility behind the machine, helping you work safely and confidently.
Pressurized cabin with filtered air and reduced sound levels.
SAVE ON SERVICE AND MAINTENANCE
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Reduced Maintenance Time and Costs
Electric-drive system maximizes consumable life, reducing oil and filter waste. Enables two times the life for power train oil and four times the life for filters.
Three levels of dynamic braking when operating in single pedal mode reduces break wear.
Operator Assist features help reduce component and tire wear by automating critical dig segments while working in the material pile.
Reduce the potential for wheel slippage without reducing hydraulic efficiency with RCS (Rimpull Control System) and modulating the left pedal from 100 to 25 percent.
Longer life, rebuildability, and high resale value with 10 percent lower maintenance costs.
Grouped service points and swing-out engine compartment service doors provide easy access to critical daily service checks.
Ecology drains to prevent spilled contaminants.
Electro-hydraulic controls.
Reduced waste with maintenance-free batteries.
Vehicle Information Management System (VIMS™) notifications to resolve problems before failure.
Operators can now check tire pressure during operation with any change sending a fault code to VisionLink®, preventing premature tire failure.
OPERATOR COMFORT AND CONTROL
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Easy, Comfortable Operator Environment
Best-in-class operator comfort and ergonomics.
Cat Premium Plus seat with standard features including leather finish, forced air heating and cooling, two-way thigh adjustment, power lumbar and back bolster adjustment, and dynamic end dampening to provide total comfort throughout the workday.
Easy-to-reach levers and seat-mounted implement pod to reduce fatigue.
Ergonomic switch placement and displays with large, backlit switches and LED indicators.
Two-position rocker switch activates the electro-hydraulic parking brake.
Reduced vibrations from isolated cab mounts and seat air suspension.
Automatic cab temperature controls.
PURPOSE-BUILT SPECIALTY MODELS
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Purpose-Built Specialty Arrangements
Millyard
Unload a typical full-length log truck in a single pass with the larger
lift and tilt cylinders and a unique tilt lever to maximize linkage
force. Up to 20% more lift capacity and 26% more tilt capacity over
the standard 988.
Swing out fan radiator design for easier service in high-debris
millyard applications reducing maintenance and service down time.
Auto reversing fan system to help dislodge debris and keep air
flowing across the radiator cores.
Additional counterweight to increase stability for improved
confidence while maneuvering with full loads.
Purpose-built lift arm with lowered cross member to increase
visibility to the tips of the forks helping to increase the speed when
lining up the load and reduce operator movements to see the for
ks.
SUSTAINABILITY
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Sustainability
The Cat® C18 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
The 988 XE emits up to 37% less CO2 than the previous 988K*.
Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) ** or 100% renewable diesel, HVO (hydrogenated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
The Cat® clean emissions module includes Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC), and Selective Catalytic Reduction (SCR) technologies to reduce the engine’s emissions.
Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
Autodig helps you work more efficiently and productively and reduce fuel burn, greenhouse gas emissions, machine wear and operator fatigue.
Auto Set Tires reduce tire wear and lowers fuel burn and greenhouse gas emissions.
Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
Rear Object Detection for the 988K XE helps enhance job site safety and blind spot awareness when operating in reverse.
Cat® Payload technology maximizes loading efficiency, helping operators of every skill level work more accurately to reduce load time, fuel costs and greenhouse gas emissions. Upgrade to Advanced Payload for expanded features and capabilities that can further increase operator efficiency and accuracy.
*All comparisons to 988K. Productivity, fuel and CO2 emissions vary by application. CO2 emissions calculations based on a reference work cycle using 2.2 U.S. gallons per hour of #2 U.S. diesel fuel based. Applies IPCC2006 methodology using U.S. EPA Emissions Hub emission factors. Includes DEF (diesel exhaust fluid) related CO2. Fuel measurements are at 15°C. Estimated average fuel consumption improvements are based on tests or Product Link® data where available. Productivity improvements are based on test data. When compared to the 988H (2010) and accounting for productivity improvements, the 988K XE emits up to 45% less CO2 per ton of material moved.
**Engines with no aftertreatment devices can use higher blends, up to 100% biodiese
988 XE Standard Equipment
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NOTE
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Standard and optional equipment may vary. Consult your Cat dealer for details.
ELECTRICAL
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Alarm, back-up
Alternator, single 150 amp
Batteries, dry
Converter, 10/15 amp, 24V to 12V
Lighting system (LED, work lights, access and service platform lighting)
Starting and charging system, 24V
Starter emergency start receptacle
Starter lockout in bumper
Transmission lockout in bumper
Hazardous voltage lamp
OPERATOR ENVIRONMENT
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Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
Air conditioner
Cat 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
CB radio-ready
Mirrors, rearview (externally mounted)
Rimpull Control System
Seat, Deluxe
Seat belt minder
Seat belt, retractable, 76 mm (3 in) wide
STIC Control System
UV glass
Virtual 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
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Brakes, oil-cooled, multi-disc, service/secondary
Case drain screens
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
Manual switch and automatic fuel priming
Cat Production Measurement ready
Cat SR Generator/Pump Drive
Cat SR Drive Motor
Cat Integrated Powered Electronics
Automatic retarding controls
ADDITIONAL EQUIPMENT
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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, 555 L (147 gal)
Hitch, drawbar with pin
Hoses, Cat XT™
Hydraulic, steering and brake filtration/screening system
Cat Clean Emission Module
Oil sampling valves
Premixed 50 percent 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
988 XE Optional Equipment
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NOTE
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Standard and optional equipment may vary. Consult your Cat dealer for details.
POWER TRAIN
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–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
Crankcase guard
Engine brake, SEA
Other Optional Configurations
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Load and Carry
Millyard
Aggregate Handler
OPERATOR ENVIRONMENT
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Cab precleaner
Cat Detect, object detection system
Cat Production Measurement
Radio, AM/FM/CD/MP3 Bluetooth® with Satellite SiriusXM
LED warning strobe
Window pull down visor
Handrail mounted mirrors
ADDITIONAL EQUIPMENT
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Front and rear roading fenders
Fast fill fuel system (Shaw-Aero)
Cold Weather Package: Additional Starter and 2 Batteries, Engine Block Heater 120V or 240V, Heated Fuel Lines
Engine Compartment Lights
Autolube with Auto shutoff
High Performance LED Lighting
Wheel Chocks
Operator Coaching
Tire Pressure Monitoring System
Autodig, Tire Slip Prevention, Auto Set Tires, and Lift Stall Prevention
Load and Carry Counterweight
