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.
Net Power - SAE J1349:2011 538 hp
Engine Power - ISO 14396:2002 580 hp
Gross Power - SAE J1995:2014 588 hp
Engine Model Cat® C18 ™
Bore 5.7in
Displacement 1105in³
Emissions U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards, Brazil MAR-1 and China Nonroad Stage IV emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA, and U.S. EPA Tier 2 and EU Stage II
Engine Model Cat® C18 ™
Engine Power - ISO 14396:2002 580hp
Gross Power - SAE J1995:2014 588hp
Net Power - SAE J1349:2011 538hp
Peak Power Speed 1500/rpm
Peak Torque - 1,200 rpm 2230lb/ft
Rated Speed 1700/min
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 269 mm × 685 mm (8.7 in × 27 in)
Lift/Tilt System Variable displacement piston
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
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 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 (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
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
Coolant (Validated by Test Cell Fill Quantities) 33gal (US)
Cooling System 31.7gal (US)
Crankcase 15.9gal (US)
Diesel Exhaust Fluid Tank 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)
Transmission 31.7gal (US)
Transmission - Validated by Test Cell Fill Quantities 29gal (US)
Machine Sound Power Level (ISO 6395:2008) 111dB(A)
Operator Sound Pressure Level (ISO 6396:2008) 73dB(A)
Machine Sound Power Level (ISO 6395:2008) 112dB(A)
Operator Sound Pressure Level (ISO 6396:2008) 73dB(A)
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
Bucket Capacities 4.7-13 m3 (6.2-17 yd3)
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 (halogen, work lights, access and service platform lighting)
Starting and charging system, 24V
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
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
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
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
Standard and optional equipment may vary. Consult your Cat dealer for details.
–50° C (–58° F) antifreeze
Engine oil change system, high speed, Wiggins
High ambient cooling – software
Cat Production Measurement
Cab precleaner
AM/FM/CD/MP3 radio
Satellite Sirius radio with bluetooth
LED warning strobe
CB radio ready
Window pull down visor
Handrail mounted mirrors
Additional counterweight
Front and rear roading fenders
Fast fill fuel system (Shaw-Aero)
Cold Weather Starting (extra starter plus two batteries), engine block heater 120V or 240V, heated fuel lines
Aggregate Handler
