988K

Heavy Equipment

988K

Net Power
541 HP / 403 kW
Operating Weight
112574 lb / 51062 kg
Bore
5.7 in / 145 mm

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 lower cost per ton. Introduced in 1963, the 988 has been the industry leader for 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Engine
Net Power 541 HP / 403 kW
Engine Model Cat® C18 ACERT™
Bore 5.7 in / 145 mm
Stroke 7.2 in / 183 mm
Displacement 1105 in³ / 18.1 l
Torque Rise 58 %
Rated Speed 1,700 rpm
Emissions U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross - ISO 14396 580 HP / 432 kW
Net Power - SAE J1349 541 HP / 403 kW
Peak Power Speed 1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP / 432 kW
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP / 439 kW
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP / 403 kW
Peak Torque - 1,200 rpm 2104 lb/ft / 2852 N·m
Operating Specifications
Operating Weight 112574 lb / 51062 kg
Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - High Lift 773-775
Cat Truck Match - Standard 770-772
Rated Payload - Loose Material 16 t / 14.5 t
Rated Payload - Quarry Face 12.5 t / 11.3 t
Transmission
Transmission Type Cat planetary power shift
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
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
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 13.7 gal/min / 52 l/min
Maximum Flow at 1,400-1,860 rpm 153 gal/min / 580 l/min
Pilot System Variable displacement piston
Relief Valve Setting 551 psi / 3800 kPa
Relief Valve Setting - Lift/Tilt 4757 psi / 32800 kPa
Service Refill Capacities
Fuel Tank 188 gal (US) / 712 l
Cooling System 31.7 gal (US) / 120 l
Crankcase 15.9 gal (US) / 60 l
Transmission 31.7 gal (US) / 120 l
Hydraulic System - Tank Only 63.4 gal (US) / 240 l
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only) 8.7 gal (US) / 33 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
Coolant (Validated by Test Cell Fill Quantities) 33 gal (US) / 125 l
Transmission - Validated by Test Cell Fill Quantities 29 gal (US) / 110 l
Buckets
Bucket Capacities 4.7-13 m3 (6.2-17 yd3)
Axles
Front Fixed
Rear Trunnion
Oscillation Angle 13°
Brakes
Brakes SAE J1473 OCT90, ISO 3450:1992
Hydraulic System - Steering
Maximum Flow 71.3 gal/min / 270 l/min
Relief Valve Setting - Steering 4351 psi / 30000 kPa
Steering Cycle Times - High Idle 3.4 s
Steering Cycle Times - Low Idle 5.6 s
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Total Steering Angle 86°
Hydraulic Cycle Time (1,400-1,860 rpm)
Dump 2.2 s
Lower Float Down 3.5 s
Rack Back 4.5 s
Raise 8 s
Total Hydraulic Cycle Time - Empty Bucket 18.2 s
Sound Performance - Tier 4 Final/Stage IV - Standard
Machine Sound Level (ISO 6395) 111 dB(A)
Operator Sound Level (ISO 6396) 72 dB(A)
Sound Performance - Tier 4 Final/Stage IV: Suppression
Machine Sound Level (ISO 6395) 109 dB(A)
Operator Sound Level (ISO 6396) 72 dB(A)
Sound Performance - Tier 2 Equivalent/Stage II: Standard
Machine Sound Level (ISO 6395) 112 dB(A)
Operator Sound Level ( ISO 6396) 73 dB(A)
Sound Performance - Tier 2 Equivalent/Stage II: Suppression
Machine Sound Level (ISO 6395) 110 dB(A)
Operator Sound Level (ISO 6396) 72 dB(A)

Standard Equipment

  • 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
    • Starter emergency 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 Detect 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, Cat Comfort (cloth), air suspension, six-way adjustable
    • 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 ACERT 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, 731 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

Optional Equipment

  • POWER TRAIN
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling – software
    • Cat Production Measurement
  • OPERATOR ENVIRONMENT
    • 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
  • MISCELLANEOUS ATTACHMENTS
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler
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