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988K XE Large Wheel Loader

Cat 988K XE Electric Drive Wheel Loader: Introduction Cat 988K XE Electric Drive Wheel Loader: Introduction
Cat 988K XE: Electric Drive Wheel Loader Animation Cat 988K XE: Electric Drive Wheel Loader Animation
988K XE 988K XE
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SPECS SUMMARY

Net Power - SAE J1349538 HP (401 kW)
Operating Weight116362 lb (52781 kg)
Bucket Capacities4.7-13 m3 (6.2-17 yd3)
Engine ModelCat® C18 ™
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 50 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988K XE brings improved sustainability and maximum efficiency to this machine platform.

Specifications

Net Power - SAE J1349538 HP (401 kW)
Operating Weight116362 lb (52781 kg)
Bucket Capacities4.7-13 m3 (6.2-17 yd3)
Engine ModelCat® C18 ™
Engine Power - ISO 14396580 HP (432 kW)
Gross Power - SAE J1995588 HP (439 kW)
Rated Speed1,700 rpm
EmissionsU.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Peak Power Speed1,500 rpm
Bore5.7 in (145 mm)
Stroke7.2 in (183 mm)
Displacement1105 in³ (18.1 l)
Peak Torque - 1,200 rpm - SAE J19952230 ft·lbf (3023 N·m)
Torque Rise58%
Operating Weight - Standard116362 lb (52781 kg)
Operating Weight - High Lift119618 lb (54258 kg)
Rated Payload - Standard (Quarry Face)12.5 ton (US) (11.3 t)
Rated Payload - Loose Material (Standard)16 ton (US) (14.5 t)
Bucket Capacity Range4.7-13 m3 (6.2-17 yd3)
Transmission TypeCat switched reluctance electric drive
Forward 1 (virtual)4.3 mile/h (7 km/h)
Forward 2 (virtual)7 mile/h (11.3 km/h)
Forward 3 (virtual)13.8 mile/h (22.2 km/h)
Forward 4 (virtual)20 mile/h (32.1 km/h)
Reverse 1 (virtual)4.3 mile/h (7 km/h)
Reverse 2 (virtual)7 mile/h (11.3 km/h)
Reverse 3 (virtual)17.5 mile/h (28.2 km/h)
Lift/Tilt System - CircuitEH-Positive Flow Control, Flow Sharing
Lift/Tilt System - PumpVariable displacement piston
Maximum Flow at 1,400-1,600 rpm153 gal/min (580 l/min)
Relief Valve Setting - Lift/Tilt4757 psi (32800 kPa)
Lift Cylinder - Bore8.7 in (210 mm)
Lift Cylinder - Stroke41.3 in (1050 mm)
Tilt Cylinder - Bore8.7 in (269 mm)
Tilt Cylinder - Stroke27 in (685 mm)
Rack Back4.5 s (4.5 s)
Raise8 s (8 s)
Dump2.2 s (2.2 s)
Lower Float Down3.5 s (3.5 s)
Total Hydraulic Cycle Time18.2 s (18.2 s)
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Maximum Flow at 1,400-1,600 rpm71.3 gal/min (270 l/min)
Steering Cut Off Pressure4351 psi (30000 kPa)
Total Steering Angle86°
Steering Cycle Times - High Idle3.4 s (3.4 s)
Steering Cycle Times - Low Idle5.6 s (5.6 s)
Air ConditioningThe 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.
FrontFixed
RearTrunnion
Oscillation Angle13°
BrakesISO 3450:2011
ROPS/FOPSROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Fuel Tank147 gal (US) (555 l)
Cooling System - Jacket Water30 gal (US) (112 l)
Cooling Systems - Power Train8 gal (US) (30 l)
Engine Crankcase16 gal (US) (60 l)
Diesel Exhaust Fluid Tank8.7 gal (US) (33 l)
Transmission16 gal (US) (60 l)
Differential - Final Drives - Front49 gal (US) (186 l)
Differential - Final Drives - Rear49 gal (US) (186 l)
Hydraulic System - Implement/Steering126 gal (US) (475 l)
NoteAll 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.
Operator Sound Level (ISO 6396)72 dB(A) (72 dB(A))
Machine Sound Level (ISO 6395)109 dB(A) (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.
Ground to Top of ROPS13.8 ft (4202 mm)
Ground to Top of Exhaust Stacks14.8 ft (4498 mm)
Ground to Top of Hood10.9 ft (3334 mm)
Ground to Bumper Clearance3.1 ft (933 mm)
Rear Axle - Centerline to Bumper10.5 ft (3187 mm)
Front Axle Centerline to Bucket Tip14 ft (14 mm)
Wheel Base14.9 ft (4550 mm)
Maximum Overall Length39.3 ft (11991 mm)
Ground to Lower Hitch Clearance1.9 ft (568 mm)
Ground to Center of Axles3.2 ft (978 mm)
Clearance at Maximum Lift11.9 ft (3641 mm)
B-Pin Height - Maximum Lift18 ft (5479 mm)
Maximum Overall Height - Bucket Raised24.5 ft (7455 mm)
Reach - Maximum Lift6.5 ft (1981 mm)
NoteSpecs 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.
Ground to Top of ROPS13.8 ft (4202 mm)
Ground to Top of Exhaust Stacks14.8 ft (4498 mm)
Ground to Top of Hood10.9 ft (3334 mm)
Ground to Bumper Clearance3.1 ft (933 mm)
Rear Axle - Centerline to Bumper10.5 ft (3187 mm)
Front Axle Centerline to Bucket Tip15.3 ft (4661 mm)
Wheel Base14.9 ft (4550 mm)
Maximum Overall Length40.7 ft (12398 mm)
Ground to Lower Hitch Clearance1.9 ft (568 mm)
Ground to Center of Axles3.2 ft (978 mm)
Clearance at Maximum Lift13.3 ft (4043 mm)
B-Pin Height - Maximum Lift19.3 ft (5881 mm)
Maximum Overall Height - Bucket Raised25.8 ft (7849 mm)
Reach - Maximum Lift6.8 ft (2062 mm)
NoteSpecs 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.

Benefits and Features

Proven Reliability

  • With 15+ years of electric-drive experience, the 988K XE combines the simple and robust switched reluctance technology with proven machine design.
  • More than 90 percent identical to the market leader, the 988K.
  • 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.

Durability

  • Achieves longer engine life and improved fuel efficiency with reduced rated speed.
  • Automatic retarder controls maintain speed on grade.
  • One-piece castings provide enhanced 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.

Achieve Greater Productivity

  • Up to 10 percent increase in productivity in load and carry applications.
  • 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.

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 for reduced rated engine speed and reduced fuel consumption.
  • 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.

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.
  • Up to 15% improved cycle time and 10% better bucket fill factor with optional Operator Coaching.
  • Up to 10% dig segment cycle optimization with optional New AutoDig features.
*Not legal for trade.

Safety Features

  • 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.

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.
  • 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.

Easy, Comfortable OperatorEnvironment

  • Best-in-class operator comfort and ergonomics.
  • Comfort Series III seats with extra thick, contoured cushions 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 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 988K.
  • 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 forks.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • 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
  • Hazardous voltage lamp
  • 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, Cat Comfort Series III, heated and ventilated, air suspension, six-way adjustable
  • 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
  • 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
  • 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

Optional Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • –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
  • Aggregate Handler
  • Millyard
  • Load and Carry
  • Cat Detect, object detection system
  • Cab precleaner
  • AM/FM/CD/MP3 radio
  • Satellite Sirius radio with Bluetooth®
  • LED warning strobe
  • Window pull down visor
  • Handrail mounted mirrors
  • Front and rear roading fenders
  • Fast fill fuel system (Shaw-Aero)
  • Cold Weather Starting (extra starter plus two batteries)
  • Aggregate Handler
  • Autodig feature, Tire Slip Prevention
  • Wheel Chocks
  • EZ Clean cooling system
  • Autodig features, Auto Set Tires & Lift Stall Prevention
  • Autolube with Auto shutoff
  • Tire Pressure Monitoring System
  • Load and Carry Counterweight