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 Power - ISO 14396:2002 580 hp
Operating Weight 112574 lb
Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3)
Engine Model Cat® C18
Bore 5.7in
Displacement 1105in³
Engine Model Cat® C18
Engine Power - ISO 14396:2002 580hp
Gross Power - SAE J1995:2014 588hp
Net Power - SAE J1349:2011 538hp
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 emissio
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.
Peak Power Speed 1500/rpm
Peak Torque - 1,200 rpm 2104lbf·ft
Rated Speed 1700/rpm
Stroke 7.2in
Torque Rise 58%
Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - High Lift 773 - 775
Cat Truck Match - Standard 770 - 772
Operating Weight 112574lb
Rated Payload - Loose Material 16t
Rated Payload - Quarry Face 12.5t
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 2 7.8mile/h
Direct Drive - Forward 3 13.9mile/h
Direct Drive - Forward 4 24.4mile/h
Direct Drive - Reverse 1 5mile/h
Direct Drive - Reverse 2 8.9mile/h
Direct Drive - Reverse 3 15.8mile/h
Forward - 1 4mile/h
Forward - 2 7.2mile/h
Forward - 3 12.7mile/h
Forward - 4 21.6mile/h
Reverse - 1 4.7mile/h
Reverse - 2 8.3mile/h
Reverse - 3 14.4mile/h
Transmission Type Cat planetary powershift
Cylinders, Double Acting - Lift, Bore and Stroke 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)
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
Lift/Tilt System - Pump Variable displacement piston
Maximum Flow at 1,400-1,860 rpm 153gal/min
Pilot System Variable displacement piston
Relief Valve Setting - Lift/Tilt 4757psi
Relief Valve Setting - Main 551psi
Dump 2.2s
Lower Float Down 3.5s
Rack Back 4.5s
Raise 8s
Total Hydraulic Cycle Time - Empty Bucket 18.2s
Maximum Flow at 1,400-1,600 rpm 71.3gal/min
Relief Valve Setting - Steering 4351psi
Steering Cycle Times - High Idle 3.4s
Steering Cycle Times - Low Idle 5.6s
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Total Steering Angle 86 °
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
Front Fixed
Oscillation Angle 13 °
Rear Trunnion
Brakes ISO 3450:2011
ROPS/FOPS ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Machine Sound Power Level (ISO 6395:2008) 111dB(A)
Machine Sound Power Level (ISO 6395:2008)** 109dB(A)
Note (1) * 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.
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.
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.
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.
Operator Sound Pressure Level (ISO 6396:2008) 73dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72dB(A)
Machine Sound Power Level (ISO 6395:2008) 112dB(A)
Machine Sound Power Level (ISO 6395:2008)** 110dB(A)
Note (1) * 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.
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.
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.
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.
Operator Sound Pressure Level (ISO 6396:2008) 73dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72dB(A)
Coolant (Validated by Test Cell Fill Quantities) 33gal (US)
Cooling System 31.7gal (US)
Crankcase 15.9gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only) 8.7gal (US)
Differential - Final Drives - Front 49.1gal (US)
Differential - Final Drives - Rear 49.1gal (US)
Fuel Tank 188gal (US)
Hydraulic System - Tank Only 63.4gal (US)
Hydraulic System Factory Fill 125.5gal (US)
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
Transmission 24.3gal (US)
Transmission - Validated by Test Cell Fill Quantities 29gal (US)
B-Pin Height - Maximum Lift 18ft
Clearance at Maximum Lift 11.9ft
Front Axle Centerline to Bucket Tip 14ft
Ground to Lower Hitch Clearance 1.9ft
Ground to Top of Exhaust Stacks 14.8ft
Ground to Top of Hood 10.9ft
Ground to Top of ROPS 13.8ft
Maximum Overall Height - Bucket Raised 24.5ft
Maximum Overall Length 39.3ft
Reach - Maximum Lift 6.5ft
Rear Axle - Centerline to Bumper 10.5ft
Wheel Base 14.9ft
B-Pin Height - Maximum Lift 19.3ft
Clearance at Maximum Lift 13.3ft
Front Axle Centerline to Bucket Tip 15.3ft
Ground to Lower Hitch Clearance 1.9ft
Ground to Top of Exhaust Stacks 14.8ft
Ground to Top of Hood 10.9ft
Ground to Top of ROPS 13.8ft
Maximum Overall Height - Bucket Raised 25.8ft
Maximum Overall Length 40.7ft
Reach - Maximum Lift 6.8ft
Rear Axle - Centerline to Bumper 10.5ft
Wheel Base 14.9ft
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 (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
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
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
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
Standard and optional equipment may vary. Consult your Cat dealer for details.
–50° C (–58° F) antifreeze
Crankcase guard
Engine oil change system, high speed, Wiggins
High ambient cooling – software
Cat Production Measurement
Cab precleaner
LED warning strobe
Window pull down visor
Handrail mounted mirrors
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
Aggregate Handler
Block Handler
Millyard
Steel Mill
