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Caterpillar

988 Wheel Loader

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)

Overview

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.

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Details

Specifications

Spec Value
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.
Spec Value
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
Spec Value
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
Spec Value
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
Spec Value
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
Spec Value
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
Spec Value
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).
Spec Value
Front Fixed Fixed
Rear Trunnion Trunnion
Oscillation Angle 13 ° 13 °
Spec Value
Brakes ISO 3450:2011 ISO 3450:2011
Spec Value
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
Spec Value
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.
Spec Value
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.
Spec Value
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.
Spec Value
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
Spec Value
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

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

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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