Large Wheel Loaders 988

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Key Specs

Engine Power - ISO 14396:2002: 580 hp; 432 kW

Operating Weight: 112574 lb; 51062 kg

Bucket Capacity Range: 4.7-13 m3 (6.2-17 yd3); 4.7-13 m3 (6.2-17 yd3)

988
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Overview

An industry leader—made better

The Cat® 988 Wheel Loader helps you move more material in less time, at a low cost per ton, for a fast return on your investment. This machine offers significant fuel savings with durability to achieve multiple lifecycles.

Benefits

BETTER FUEL EFFICIENCY

Utilizing Economy Mode helps save on fuel all while maintaining productivity

EASIER MAINTENANCE

Make regular maintenance more convenient with grouped service points

MORE PRODUCTIVITY

Deliver more productivity in most truck loading applications while using performance series buckets with increased capacities

Features At A Glance

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Specifications Standard Equipment Optional Equipment

Product Specifications for 988

Engine

Engine Power - ISO 14396:2002	580 hp 432 kW
Engine Model	Cat® C18 Cat® C18
Rated Speed	1700/rpm 1700/rpm
Peak Power Speed	1500/rpm 1500/rpm
Gross Power - SAE J1995:2014	588 hp 439 kW
Net Power - SAE J1349:2011	538 hp 401 kW
Bore	5.7 in 145 mm
Stroke	7.2 in 183 mm
Displacement	1105 in³ 18.1 l
Peak Torque - 1,200 rpm	2104 lbf·ft 2852 N·m
Torque Rise	58 % 58 %
Note (1)	Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emission standards. Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emission standards.
Note (2)	Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator.

Operating Specifications

Operating Weight	112574 lb 51062 kg
Bucket Capacity Range	4.7-13 m3 (6.2-17 yd3) 4.7-13 m3 (6.2-17 yd3)
Rated Payload - Quarry Face	12.5 t 11.3 t
Rated Payload - Loose Material	16 t 14.5 t
Cat Truck Match - Standard	770 - 772 770 - 772
Cat Truck Match - High Lift	773 - 775 773 - 775

Transmission

Transmission Type	Cat planetary powershift Cat planetary powershift
Forward - 1	4 mile/h 6.5 km/h
Forward - 2	7.2 mile/h 11.6 km/h
Forward - 3	12.7 mile/h 20.4 km/h
Forward - 4	21.6 mile/h 34.7 km/h
Reverse - 1	4.7 mile/h 7.5 km/h
Reverse - 2	8.3 mile/h 13.3 km/h
Reverse - 3	14.4 mile/h 23.2 km/h
Direct Drive - Forward 1	Lock-up disabled Lock-up disabled
Direct Drive - Forward 2	7.8 mile/h 12.5 km/h
Direct Drive - Forward 3	13.9 mile/h 22.3 km/h
Direct Drive - Forward 4	24.4 mile/h 39.3 km/h
Direct Drive - Reverse 1	5 mile/h 8 km/h
Direct Drive - Reverse 2	8.9 mile/h 14.3 km/h
Direct Drive - Reverse 3	15.8 mile/h 25.5 km/h

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit	EH- Positive Flow Control, Flow Sharing EH- Positive Flow Control, Flow Sharing
Lift/Tilt System - Pump	Variable displacement piston Variable displacement piston
Maximum Flow at 1,400-1,860 rpm	153 gal/min 580 l/min
Relief Valve Setting - Lift/Tilt	4757 psi 32800 kPa
Cylinders, Double Acting - Lift, Bore and Stroke	210 mm × 1050 mm (8.7 in × 41.3 in) 210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke	266 mm × 685 mm (8.7 in × 27 in) 266 mm × 685 mm (8.7 in × 27 in)
Pilot System	Variable displacement piston Variable displacement piston
Relief Valve Setting - Main	551 psi 3800 kPa

Hydraulic Cycle Time (1,400-1,860 rpm)

Rack Back	4.5 s 4.5 s
Raise	8 s 8 s
Dump	2.2 s 2.2 s
Lower Float Down	3.5 s 3.5 s
Total Hydraulic Cycle Time - Empty Bucket	18.2 s 18.2 s

Hydraulic System - Steering

Steering System - Circuit	Pilot, load sensing Pilot, load sensing
Steering System - Pump	Piston, variable displacement Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm	71.3 gal/min 270 l/min
Relief Valve Setting - Steering	4351 psi 30000 kPa
Total Steering Angle	86 ° 86 °
Steering Cycle Times - High Idle	3.4 s 3.4 s
Steering Cycle Times - Low Idle	5.6 s 5.6 s

Air Conditioning System

Air Conditioning

• The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. • If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons). • The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. • If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons).

Axles

Front	Fixed Fixed
Rear	Trunnion Trunnion
Oscillation Angle	13 ° 13 °

Brakes

Brakes

ISO 3450:2011 ISO 3450:2011

Operator's Cab

ROPS/FOPS

ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards

Sound Performance - Tier 4 Final / Stage V

Operator Sound Pressure Level (ISO 6396:2008)	73 dB(A) 73 dB(A)
Machine Sound Power Level (ISO 6395:2008)	111 dB(A) 111 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*	72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)**	109 dB(A) 109 dB(A)
Note (1)	* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”
Note (2)	European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.
Note (3)	The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (4)	The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (5)	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. 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.

Sound Performance - Tier 3 / Stage IIIA

Operator Sound Pressure Level (ISO 6396:2008)	73 dB(A) 73 dB(A)
Machine Sound Power Level (ISO 6395:2008)	112 dB(A) 112 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*	72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)**	110 dB(A) 110 dB(A)
Note (1)	* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”
Note (2)	European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.
Note (3)	The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (4)	The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (5)	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. 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.

Service Refill Capacities

Fuel Tank	188 gal (US) 712 l
Cooling System	31.7 gal (US) 120 l
Coolant (Validated by Test Cell Fill Quantities)	33 gal (US) 125 l
Crankcase	15.9 gal (US) 60 l
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only)	8.7 gal (US) 33 l
Transmission	24.3 gal (US) 92 l
Transmission - Validated by Test Cell Fill Quantities	29 gal (US) 110 l
Differential - Final Drives - Front	49.1 gal (US) 186 l
Differential - Final Drives - Rear	49.1 gal (US) 186 l
Hydraulic System Factory Fill	125.5 gal (US) 475 l
Hydraulic System - Tank Only	63.4 gal (US) 240 l
Note	• All non-road Tier 4 Final/Stage V 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)* – 100% renewable diesel, HVO (hydrotreated 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. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated 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. * For use of blends higher than 20% biodiesel, consult your Cat dealer. Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. • All non-road Tier 4 Final/Stage V 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)* – 100% renewable diesel, HVO (hydrotreated 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. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated 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. * For use of blends higher than 20% biodiesel, consult your Cat dealer. ** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS	13.8 ft 4202 mm
Ground to Top of Exhaust Stacks	14.8 ft 4521 mm
Ground to Top of Hood	10.9 ft 3334 mm
Rear Axle - Centerline to Bumper	10.5 ft 3187 mm
Front Axle Centerline to Bucket Tip	14 ft 4254 mm
Wheel Base	14.9 ft 4550 mm
Maximum Overall Length	39.3 ft 11991 mm
Ground to Lower Hitch Clearance	1.9 ft 568 mm
Clearance at Maximum Lift	11.9 ft 3641 mm
B-Pin Height - Maximum Lift	18 ft 5485 mm
Maximum Overall Height - Bucket Raised	24.5 ft 7455 mm
Reach - Maximum Lift	6.5 ft 1981 mm

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS	13.8 ft 4202 mm
Ground to Top of Exhaust Stacks	14.8 ft 4521 mm
Ground to Top of Hood	10.9 ft 3334 mm
Rear Axle - Centerline to Bumper	10.5 ft 3187 mm
Front Axle Centerline to Bucket Tip	15.3 ft 4661 mm
Wheel Base	14.9 ft 4550 mm
Maximum Overall Length	40.7 ft 12398 mm
Ground to Lower Hitch Clearance	1.9 ft 568 mm
Clearance at Maximum Lift	13.3 ft 4043 mm
B-Pin Height - Maximum Lift	19.3 ft 5887 mm
Maximum Overall Height - Bucket Raised	25.8 ft 7849 mm
Reach - Maximum Lift	6.8 ft 2062 mm

988 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

Auxiliary 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

CB radio ready

Air conditioner

Cat Vision, rear vision camera system

Cab, sound suppressed and pressurized, integrated rollover protective structure/falling objects 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 – Powertrain oil temperature

Light, cab, dome

Lunchbox, beverage holders

Radio, AM/FM/CD/MP3 Bluetooth®

Mirrors, rearview (externally mounted)

Rimpull Control System (RCS)

Seat, deluxe

Seat belt minder

Seat belt, retractable, 76 mm (3 in) wide

Steering and Transmission Integrated Control (STIC™) System

UV glass

Vital Information Management System (VIMS™) with Graphical Information Display: External Data Port

Wet-arm wipers/washers (front and rear): – Intermittent front and rear wipers

Lights, directional

POWERTRAIN

Brakes, oil-cooled, multi-disc, service/secondary

Case drain screens

Electro hydraulic parking brake

Engine, C18 Mechanically Actuated Electronic Unit Injection (MEUI™) diesel, turbocharged/aftercooled

Ground level engine shutdown switch

Turbine precleaner, engine air intake

Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)

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

ADDITIONAL EQUIPMENT

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 (CEM)

Oil sampling valves

Rear access to cab and service platform

Steering, load sensing

Toe kicks

Vandalism protection caplocks

988 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

POWERTRAIN

–50° C (–58° F) antifreeze

Crankcase guard

Engine oil change system, high speed, Wiggins

High ambient cooling – software

Cat Production Measurement

OPERATOR ENVIRONMENT

Cab precleaner

LED warning strobe

Window pull down visor

Handrail mounted mirrors

ADDITIONAL EQUIPMENT

Additional counterweight

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

OTHER OPTIONAL CONFIGURATIONS

Aggregate Handler

Block Handler

Millyard

Steel Mill

Product Specifications for 988

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Engine

Engine Power - ISO 14396:2002	580 hp 432 kW
Engine Model	Cat® C18 Cat® C18
Rated Speed	1700/rpm 1700/rpm
Peak Power Speed	1500/rpm 1500/rpm
Gross Power - SAE J1995:2014	588 hp 439 kW
Net Power - SAE J1349:2011	538 hp 401 kW
Bore	5.7 in 145 mm
Stroke	7.2 in 183 mm
Displacement	1105 in³ 18.1 l
Peak Torque - 1,200 rpm	2104 lbf·ft 2852 N·m
Torque Rise	58 % 58 %
Note (1)	Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emission standards. Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emission standards.
Note (2)	Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator.

Operating Specifications

Operating Weight	112574 lb 51062 kg
Bucket Capacity Range	4.7-13 m3 (6.2-17 yd3) 4.7-13 m3 (6.2-17 yd3)
Rated Payload - Quarry Face	12.5 t 11.3 t
Rated Payload - Loose Material	16 t 14.5 t
Cat Truck Match - Standard	770 - 772 770 - 772
Cat Truck Match - High Lift	773 - 775 773 - 775

Transmission

Transmission Type	Cat planetary powershift Cat planetary powershift
Forward - 1	4 mile/h 6.5 km/h
Forward - 2	7.2 mile/h 11.6 km/h
Forward - 3	12.7 mile/h 20.4 km/h
Forward - 4	21.6 mile/h 34.7 km/h
Reverse - 1	4.7 mile/h 7.5 km/h
Reverse - 2	8.3 mile/h 13.3 km/h
Reverse - 3	14.4 mile/h 23.2 km/h
Direct Drive - Forward 1	Lock-up disabled Lock-up disabled
Direct Drive - Forward 2	7.8 mile/h 12.5 km/h
Direct Drive - Forward 3	13.9 mile/h 22.3 km/h
Direct Drive - Forward 4	24.4 mile/h 39.3 km/h
Direct Drive - Reverse 1	5 mile/h 8 km/h
Direct Drive - Reverse 2	8.9 mile/h 14.3 km/h
Direct Drive - Reverse 3	15.8 mile/h 25.5 km/h

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit	EH- Positive Flow Control, Flow Sharing EH- Positive Flow Control, Flow Sharing
Lift/Tilt System - Pump	Variable displacement piston Variable displacement piston
Maximum Flow at 1,400-1,860 rpm	153 gal/min 580 l/min
Relief Valve Setting - Lift/Tilt	4757 psi 32800 kPa
Cylinders, Double Acting - Lift, Bore and Stroke	210 mm × 1050 mm (8.7 in × 41.3 in) 210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke	266 mm × 685 mm (8.7 in × 27 in) 266 mm × 685 mm (8.7 in × 27 in)
Pilot System	Variable displacement piston Variable displacement piston
Relief Valve Setting - Main	551 psi 3800 kPa

Hydraulic Cycle Time (1,400-1,860 rpm)

Rack Back	4.5 s 4.5 s
Raise	8 s 8 s
Dump	2.2 s 2.2 s
Lower Float Down	3.5 s 3.5 s
Total Hydraulic Cycle Time - Empty Bucket	18.2 s 18.2 s

Hydraulic System - Steering

Steering System - Circuit	Pilot, load sensing Pilot, load sensing
Steering System - Pump	Piston, variable displacement Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm	71.3 gal/min 270 l/min
Relief Valve Setting - Steering	4351 psi 30000 kPa
Total Steering Angle	86 ° 86 °
Steering Cycle Times - High Idle	3.4 s 3.4 s
Steering Cycle Times - Low Idle	5.6 s 5.6 s

Air Conditioning System

Air Conditioning

Axles

Front	Fixed Fixed
Rear	Trunnion Trunnion
Oscillation Angle	13 ° 13 °

Brakes

Brakes

ISO 3450:2011 ISO 3450:2011

Operator's Cab

ROPS/FOPS

ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards

Sound Performance - Tier 4 Final / Stage V

Operator Sound Pressure Level (ISO 6396:2008)	73 dB(A) 73 dB(A)
Machine Sound Power Level (ISO 6395:2008)	111 dB(A) 111 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*	72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)**	109 dB(A) 109 dB(A)
Note (1)	* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”
Note (2)	European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.
Note (3)	The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (4)	The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (5)	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. 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.

Sound Performance - Tier 3 / Stage IIIA

Operator Sound Pressure Level (ISO 6396:2008)	73 dB(A) 73 dB(A)
Machine Sound Power Level (ISO 6395:2008)	112 dB(A) 112 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*	72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)**	110 dB(A) 110 dB(A)
Note (1)	* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”
Note (2)	European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.
Note (3)	The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (4)	The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.
Note (5)	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. 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.

Service Refill Capacities

Fuel Tank	188 gal (US) 712 l
Cooling System	31.7 gal (US) 120 l
Coolant (Validated by Test Cell Fill Quantities)	33 gal (US) 125 l
Crankcase	15.9 gal (US) 60 l
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only)	8.7 gal (US) 33 l
Transmission	24.3 gal (US) 92 l
Transmission - Validated by Test Cell Fill Quantities	29 gal (US) 110 l
Differential - Final Drives - Front	49.1 gal (US) 186 l
Differential - Final Drives - Rear	49.1 gal (US) 186 l
Hydraulic System Factory Fill	125.5 gal (US) 475 l
Hydraulic System - Tank Only	63.4 gal (US) 240 l
Note	• All non-road Tier 4 Final/Stage V 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)* – 100% renewable diesel, HVO (hydrotreated 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. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated 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. * For use of blends higher than 20% biodiesel, consult your Cat dealer. Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. • All non-road Tier 4 Final/Stage V 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)* – 100% renewable diesel, HVO (hydrotreated 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. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated 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. * For use of blends higher than 20% biodiesel, consult your Cat dealer. ** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS	13.8 ft 4202 mm
Ground to Top of Exhaust Stacks	14.8 ft 4521 mm
Ground to Top of Hood	10.9 ft 3334 mm
Rear Axle - Centerline to Bumper	10.5 ft 3187 mm
Front Axle Centerline to Bucket Tip	14 ft 4254 mm
Wheel Base	14.9 ft 4550 mm
Maximum Overall Length	39.3 ft 11991 mm
Ground to Lower Hitch Clearance	1.9 ft 568 mm
Clearance at Maximum Lift	11.9 ft 3641 mm
B-Pin Height - Maximum Lift	18 ft 5485 mm
Maximum Overall Height - Bucket Raised	24.5 ft 7455 mm
Reach - Maximum Lift	6.5 ft 1981 mm

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS	13.8 ft 4202 mm
Ground to Top of Exhaust Stacks	14.8 ft 4521 mm
Ground to Top of Hood	10.9 ft 3334 mm
Rear Axle - Centerline to Bumper	10.5 ft 3187 mm
Front Axle Centerline to Bucket Tip	15.3 ft 4661 mm
Wheel Base	14.9 ft 4550 mm
Maximum Overall Length	40.7 ft 12398 mm
Ground to Lower Hitch Clearance	1.9 ft 568 mm
Clearance at Maximum Lift	13.3 ft 4043 mm
B-Pin Height - Maximum Lift	19.3 ft 5887 mm
Maximum Overall Height - Bucket Raised	25.8 ft 7849 mm
Reach - Maximum Lift	6.8 ft 2062 mm

988 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

Auxiliary 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

CB radio ready

Air conditioner

Cat Vision, rear vision camera system

Cab, sound suppressed and pressurized, integrated rollover protective structure/falling objects 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 – Powertrain oil temperature

Light, cab, dome

Lunchbox, beverage holders

Radio, AM/FM/CD/MP3 Bluetooth®

Mirrors, rearview (externally mounted)

Rimpull Control System (RCS)

Seat, deluxe

Seat belt minder

Seat belt, retractable, 76 mm (3 in) wide

Steering and Transmission Integrated Control (STIC™) System

UV glass

Vital Information Management System (VIMS™) with Graphical Information Display: External Data Port

Wet-arm wipers/washers (front and rear): – Intermittent front and rear wipers

Lights, directional

POWERTRAIN

Brakes, oil-cooled, multi-disc, service/secondary

Case drain screens

Electro hydraulic parking brake

Engine, C18 Mechanically Actuated Electronic Unit Injection (MEUI™) diesel, turbocharged/aftercooled

Ground level engine shutdown switch

Turbine precleaner, engine air intake

Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)

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

ADDITIONAL EQUIPMENT

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 (CEM)

Oil sampling valves

Rear access to cab and service platform

Steering, load sensing

Toe kicks

Vandalism protection caplocks

988 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

POWERTRAIN

–50° C (–58° F) antifreeze

Crankcase guard

Engine oil change system, high speed, Wiggins

High ambient cooling – software

Cat Production Measurement

OPERATOR ENVIRONMENT

Cab precleaner

LED warning strobe

Window pull down visor

Handrail mounted mirrors

ADDITIONAL EQUIPMENT

Additional counterweight

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

OTHER OPTIONAL CONFIGURATIONS

Aggregate Handler

Block Handler

Millyard

Steel Mill

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