988 XE Wheel Loader

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Description

Technical Specifications

Benefits and Features

Equipment

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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.

Engine
Net Power - SAE J1349:2011	538 hp
Engine Model	Cat® C18 ™
Engine Power - ISO 14396:2002	580 hp
Gross Power - SAE J1995:2014	588 hp
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	5.7 in
Stroke	7.2 in
Displacement	1105 in³
Peak Torque - 1,200 rpm - SAE J1995	2230 ft·lbf
Torque Rise	58%
Operating Specifications
Operating Weight	116362 lb
Operating Weight - Standard	116362 lb
Operating Weight - High Lift	119618 lb
Rated Payload - Standard (Quarry Face)	12.5 ton (US)
Rated Payload - Loose Material (Standard)	16 ton (US)
Bucket Capacity Range	4.7-13 m3 (6.2-17 yd3)
Transmission
Transmission Type	Cat switched reluctance electric drive
Forward 1 (virtual)	4.3 mile/h
Forward 2 (virtual)	7 mile/h
Forward 3 (virtual)	13.8 mile/h
Forward 4 (virtual)	20 mile/h
Reverse 1 (virtual)	4.3 mile/h
Reverse 2 (virtual)	7 mile/h
Reverse 3 (virtual)	17.5 mile/h
Hydraulic System - Lift/Tilt
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	153 gal/min
Relief Valve Setting - Lift/Tilt	4757 psi
Lift Cylinder - Bore	8.7 in
Lift Cylinder - Stroke	41.3 in
Tilt Cylinder - Bore	8.7 in
Tilt Cylinder - Stroke	27 in
Hydraulic Cycle Times
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
Steering System - Circuit	Pilot, load sensing
Steering System - Pump	Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm	71.3 gal/min
Steering Cut Off Pressure	4351 psi
Total Steering Angle	86°
Steering Cycle Times - High Idle	3.4 s
Steering Cycle Times - Low Idle	5.6 s
Air Conditioning System
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
Front	Fixed
Rear	Trunnion
Oscillation Angle	13°
Brakes
Brakes	ISO 3450:2011
Operator's Cab
ROPS/FOPS	ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Service Refill Capacities
Fuel Tank	147 gal (US)
Cooling System - Jacket Water	30 gal (US)
Cooling Systems - Power Train	8 gal (US)
Engine Crankcase	16 gal (US)
Diesel Exhaust Fluid Tank	8.7 gal (US)
Transmission	16 gal (US)
Differential - Final Drives - Front	49 gal (US)
Differential - Final Drives - Rear	49 gal (US)
Hydraulic System - Implement/Steering	126 gal (US)
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, alternati
Sound Performance - Tier 4 Final / Stage V - Standard
Operator Sound Pressure Level (ISO 6396:2008)	72 dB(A)
Machine Sound Power Level (ISO 6395:2008)	109 dB(A)
Sound Performance - Tier 3 / Stage III - Standard
Operator Sound Pressure Level (ISO 6396:2008)	72 dB(A)
Machine Sound Power Level (ISO 6395:2008)	110 dB(A)
Dimensions (Approximate) - Standard Lift
Ground to Top of ROPS	13.8 ft
Ground to Top of Exhaust Stacks	14.8 ft
Ground to Top of Hood	10.9 ft
Ground to Bumper Clearance	3.1 ft
Rear Axle - Centerline to Bumper	10.5 ft
Front Axle Centerline to Bucket Tip	14 ft
Wheel Base	14.9 ft
Maximum Overall Length	39.3 ft
Ground to Lower Hitch Clearance	1.9 ft
Ground to Center of Axles	3.2 ft
Clearance at Maximum Lift	11.9 ft
B-Pin Height - Maximum Lift	18 ft
Maximum Overall Height - Bucket Raised	24.5 ft
Reach - Maximum Lift	6.5 ft
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
Ground to Top of ROPS	13.8 ft
Ground to Top of Exhaust Stacks	14.8 ft
Ground to Top of Hood	10.9 ft
Ground to Bumper Clearance	3.1 ft
Rear Axle - Centerline to Bumper	10.5 ft
Front Axle Centerline to Bucket Tip	15.3 ft
Wheel Base	14.9 ft
Maximum Overall Length	40.7 ft
Ground to Lower Hitch Clearance	1.9 ft
Ground to Center of Axles	3.2 ft
Clearance at Maximum Lift	13.3 ft
B-Pin Height - Maximum Lift	19.3 ft
Maximum Overall Height - Bucket Raised	25.8 ft
Reach - Maximum Lift	6.8 ft
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
Ground to Top of ROPS	13.8 ft
Ground to Top of Exhaust Stacks	13.8 ft
Ground to Top of Hood	10.9 ft
Ground to Bumper Clearance	3.1 ft
Rear Axle - Centerline to Bumper	10.5 ft
Front Axle Centerline to Fork Tip	16.5 ft
Wheel Base	14.9 ft
Maximum Overall Length	41.9 ft
Ground to Lower Hitch Clearance	1.9 ft
Ground to Center of Front Axle	3.2 ft
Fork Height with Level Arms	8.1 ft
Fork Top Clamp Opening	13.1 ft
Fork Height at Maximum Lift	17.2 ft
Hinge Pin Height at Maximum Lift	16.1 ft
Dump Angle at Maximum Lift	-39.4 °
Buckets
Bucket Capacities	4.7-13 m3 (6.2-17 yd3)
Sustainability
Recyclability	96%

PROVEN RELIABILITY

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 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

Durability

Achieves long engine life and improved fuel efficiency with reduced high idle speed.

Automatic retarder controls help maintain optimal speed on grade.

One-piece castings help provide enhanced front linkage strength in key pin areas.

Full box section rear frame helps resist torsional shock and twisting forces.

Durable construction withstands the toughest loading conditions and multiple life cycles.

Dynamic braking helps achieve long brake life while operating in single pedal mode.

ACHIEVE GREATER PRODUCTIVITY

Achieve Greater Productivity

Electric-drive system eliminates shifting and simplifies operator control, helping to accelerate 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 help increase operator productivity.

Superior digging, higher bucket fill factors, and reduced dig times.

Improved visibility over the top of the linkage.

POWERFUL EFFICIENCY

Superior Fuel Efficiency

Up to 32 percent more fuel efficiency in truck loading applications.

Continuously variable speed control up to maximum ground speed.

Positive Flow Control (PFC) hydraulic system helps increase efficiency, bucket feel, and responsiveness with consistent performance.

Economy mode provides 100% ECM managed engine speed to help provide the most fuel efficient required RPM during machine operation.

Fully integrated electronic engine controls help make your fuel go farther.

Engine idle shutdown for less fuel used while idling.

Flow sharing hydraulics provide full‑flow at reduced engine rpm.

Increased hydraulic speed and faster cycle times help decrease idle time and fuel burn, with optimal efficiency.

PRODUCTIVITY WITH TECHNOLOGY

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 plan 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.

Optimized dig segment cycle with optional Operator Assist – Tire Slip Prevention, Auto Set Tires, and Lift Stall Prevention.

Easy 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

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 helps provide lower risk of slips, trips, and falls due to better visibility of the steps and stairway.

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

Reduced Maintenance Time and Costs

Electric-drive system helps maximize 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 helps reduce 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.

Long life, rebuildability, and high resale value with low maintenance costs.

Grouped service points and swing-out engine compartment service doors provide easy access to critical daily service checks.

Ecology drains to prevent spills.

Reduced waste with maintenance-free batteries.

Vehicle Information Management System (VIMS™) notifications to help resolve problems before failure.

Operators can now monitor tire pressure during operation. Any change sending a fault code to VisionLink®, helps prevent premature tire failure.

OPERATOR COMFORT AND CONTROL

Easy, Comfortable Operator Environment

World-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 help reduce fatigue.

Ergonomic switch placement and displays with 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

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. Designed with 20% more lift capacity and 26% more tilt capacity over the standard 988.

Swing out fan radiator design for easy service in high-debris millyard applications helping to reduce maintenance and service down time. Auto reversing fan system to help dislodge debris and keep air flowing across the radiator cores.

Additional counterweight to help increase stability for improved confidence while maneuvering with full loads.

Purpose-built lift arm with lowered cross member to help 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.

SUSTAINABILITY

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% biodiesel.

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 (LED, work lights, access and service platform lighting)
- Starting and charging system, 24V
- Jump start receptacle
- Starter lockout in bumper
- Transmission lockout in bumper
- Hazardous voltage lamp
Operator Environment
- 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
- 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 switched reluctance (SR) generator/pump drive
- Cat switched reluctance (SR) drive motor
- Cat Integrated Powered Electronics
- Automatic retarding controls
Additional Equipment
- 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