988 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 low cost per ton. Introduced in 1963, the 988 has been an industry leader for 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Engine
Net Power - SAE J1349	541 HP
Engine Power - ISO 14396	580 HP
Gross Power - SAE J1995	588 HP
Engine Model	Cat® C18 ™
Rated Speed	1700/min
Peak Power Speed	1500/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	2230 lb/ft
Torque Rise	58 %
Operating Specifications
Operating Weight	112574 lb
Rated Payload - Quarry Face	12.5 t
Rated Payload - Loose Material	16 t
Bucket Capacity Range	4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - Standard	770～772
Cat Truck Match - High Lift	773～775
Transmission
Transmission Type	Cat planetary powershift
Forward - 1	4 mile/h
Forward - 2	7.2 mile/h
Forward - 3	12.7 mile/h
Forward - 4	21.6 mile/h
Reverse - 1	4.7 mile/h
Reverse - 2	8.3 mile/h
Reverse - 3	14.4 mile/h
Direct Drive - Forward 1	Lock-up disabled
Direct Drive - Forward 2	7.8 mile/h
Direct Drive - Forward 3	13.9 mile/h
Direct Drive - Forward 4	24.4 mile/h
Direct Drive - Reverse 1	5 mile/h
Direct Drive - Reverse 2	8.9 mile/h
Direct Drive - Reverse 3	15.8 mile/h
Hydraulic System - Lift/Tilt
Lift/Tilt System - Circuit	EH- Positive Flow Control, Flow Sharing
Lift/Tilt System	Variable displacement piston
Maximum Flow at 1,400-1,860 rpm	153 gal/min
Relief Valve Setting - Lift/Tilt	4757 psi
Cylinders, Double Acting - Lift, Bore and Stroke	210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke	269 mm × 685 mm (8.7 in × 27 in)
Pilot System	Variable displacement piston
Relief Valve Setting - Main	551 psi
Hydraulic Cycle Time (1,400-1,860 rpm)
Rack Back	4.5 s
Raise	8 s
Dump	2.2 s
Lower Float Down	3.5 s
Total Hydraulic Cycle Time - Empty Bucket	18.2 s
Hydraulic System - Steering
Steering System - Circuit	Pilot, load sensing
Steering System - Pump	Piston, variable displacement
Maximum Flow	71.3 gal/min
Relief Valve Setting - Steering	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	188 gal (US)
Cooling System	31.7 gal (US)
Coolant (Validated by Test Cell Fill Quantities)	33 gal (US)
Crankcase	15.9 gal (US)
Diesel Exhaust Fluid Tank	8.7 gal (US)
Transmission	31.7 gal (US)
Transmission - Validated by Test Cell Fill Quantities	29 gal (US)
Differential - Final Drives - Front	49.1 gal (US)
Differential - Final Drives - Rear	49.1 gal (US)
Hydraulic System Factory Fill	125.5 gal (US)
Hydraulic System - Tank Only	63.4 gal (US)
Sound Performance - Tier 4 Final/EU Stage V - Standard
Operator Sound Level (ISO 6396)	72 dB(A)
Machine Sound Level (ISO 6395)	111 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.
Dimensions (Approximate) - Standard Lift Linkage
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
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
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
Dimensions (Approximate) - High Lift Linkage
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
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
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
Buckets
Bucket Capacities	4.7-13 m3 (6.2-17 yd3)

PROVEN RELIABILITY

Cat C18 engine is built and tested to meet your most demanding applications.

Cat torque converter with lock-up clutch helps reduce torque converter losses and lowers system heat.

Maximum responsiveness with Steering and Transmission Integrated Control (STIC™).

Moves more material efficiently with improved power and control.

Durable construction withstands the toughest loading conditions and multiple lifecycles.

LONG TERM VALUE AND DURABILITY

World-class transmission for long life and consistent, smooth shifting; specifically designed for mining applications.

Advanced productivity electronic control strategy (APECS) transmission controls for optimal momentum on grades.

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

Advanced filtration system for extended performance and reliability of the hydraulic system.

Impeller clutch torque converter (ICTC) helps minimize tire spin by allowing torque to adjust to underfoot conditions.

PERFORMANCE AND PRODUCTIVITY

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

Improved visibility over the top of the linkage.

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

Convenient, responsive, electro-hydraulic controls help increase operator productivity.

PERFORMANCE WITH LESS FUEL

Economy mode helps optimize engine speed control for reduced fuel consumption no matter if operating in manual throttle or throttle lock.

Flow sharing hydraulics provide full flow at reduced engine rpm.

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

Engine idle shutdown for less fuel used while idling.

Increased hydraulic speed and fast cycle times helps decrease idle and fuel burn, with optimal efficiency.

PRODUCTIVITY WITH TECHNOLOGY

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 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

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 visbility 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

Grouped service points provide easy access to critical daily service checks.

Swing-out engine compartment service doors.

Reduced waste with maintenance-free batteries.

Ecology drains to prevent spills and allow for easier service.

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

Ground level access to transmission control valves.

Long life, rebuildability, and high resale value.

OPERATOR COMFORT AND CONTROL

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 - BLOCK HANDLER

Delivers stability and durability with an optimized counterweight for block handling applications.

A high rimpull powertrain features a torque converter and transmission specially designed for this application to maximize rimpull.

An additional hydraulic valve with the quick coupler allows the operator to switch work tools and immediately lock the work tool during load and carry applications.

Purpose-built tilt and lift cylinders on the linkage help improve load control and ensure safe and long lasting operation.

Ride control acts as a shock absorber, providing the operator with a smoother ride over rough terrain.

PURPOSE-BUILT SPECIALTY MODELS - 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 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.

PURPOSE-BUILT SPECIALTY MODELS - STEEL MILL

Durable and reinforced attachments for operator comfort, safety, and easy machine access.

Radiator is designed for easy cleaning and to keep material from building up.

Auto reversing fan and easy access to cooling cores help keep cab at comfortable temperature.

Equipped with extra guarding and heat protection for critical machine functions.

Flame resistant ecosafe hydraulic fluid available as an option.

Performance series, serrated edge slag, straight edge slag, and slag buckets help maximize material retention and minimize dig time.

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
- Jump 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 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, deluxe
- 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, 712 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