Skip to main content Skip to navigation
AgAgriculture Blog IconBehind the Scenes Blog IconConstruction Blog IconEquipment Maintenance Blog IconPower Systems Blog Icon Thumbs Down Thumbs Up! Small Business Blog IconTachnology Blog IconConstructioncontrol-smallcost-smallefficiency-smallflexibility-smallHoursHours Location HoursMapMapMenu AgMenu AttachmentsMenu BlogMenu CareersMenu ChecklistMenu ConstructionMenu MaintenanceMenu NewMenu PowerMenu RebuildsMenu RentMenu ServiceMenu TechnologyMenu TestimonialsMenu Training Menu Truck Menu UsedNewArtboard 1Parts Phone PhonePower Systemsproductivity-smallRentalRepSafetyServiceSpecialsTechtestimonial-iconToolsTrainingTruckUsed

Ziegler CAT

Caterpillar

988K Wheel Loader Steel Mill Arrangement

Net Power

541 HP

Operating Weight

112574 lb

Bucket Capacities

5.4-6.3 m3 (7.0-8.3 yd3)

Overview

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.

Photos

Videos

  • Meet the Pros: Randy Aneloski, Cat® Large Wheel Loaders
  • Large Wheel Loader Operator Training

360° View

Exterior

360° Exterior view. Double click on the image to zoom in on any area of the product.

Interior

360° interior view. Double click on the image to zoom in on any area of the product.

Specifications

  • Engine
    Spec Value
    Net Power 541 HP
    Engine Model Cat® C18 ™
    Net Power - SAE J1349 541 HP
    Bore 5.7 in
    Stroke 7.2 in
    Displacement 1105 in³
    Torque Rise 58 %
    Rated Speed 1700/min
    Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP
    Gross - ISO 14396 580 HP
    Peak Power Speed 1500/min
    Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP
    Peak Torque - 1,200 rpm 2104 lb/ft
    Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP
    Emissions Einhaltung von EPA Tier 4 Final (USA)/Stufe IV (EU), Tier-2-konform
  • Operating Specifications
    Spec Value
    Operating Weight 112574 lb
    Rated Payload 12.5 t
    Rated Payload - Standard 12.5 t
    Bucket Capacity Range 6.4-7.6 m3 (8.3-10 yd3)
    Cat Truck Match - Standard 770-772
    Cat Truck Match - High Lift 773-775
    Rated Payload - High Lift 12.5 t
  • Transmission
    Spec Value
    Transmission Type Cat-Planetenlastschaltgetriebe
    Forward - 1 4 mile/h
    Forward - 2 7.2 mile/h
    Forward - 3 12.7 mile/h
    Forward - 4 21.6 mile/h
    Reverse - 1 4.7 mile/h
    Reverse - 2 8.3 mile/h
    Reverse - 3 14.4 mile/h
    Direct Drive - Forward 1 Lock-up disabled
    Direct Drive - Forward 2 7.8 mile/h
    Direct Drive - Forward 3 13.9 mile/h
    Direct Drive - Forward 4 24.4 mile/h
    Direct Drive - Reverse 1 5 mile/h
    Direct Drive - Reverse 2 8.9 mile/h
    Direct Drive - Reverse 3 15.8 mile/h
  • Hydraulic System - Lift/Tilt
    Spec Value
    Pilot System Variable displacement piston
    Relief Valve Setting 551 psi
    Maximum Flow 13.7 gal/min
    Cylinders, Double Acting - Tilt, Bore and Stroke 267 mm × 685 mm (10.5 in × 27.0 in)
    Maximum Flow at 1,400-1,860 rpm 153 gal/min
    Cylinders, Double Acting - Lift, Bore and Stroke 210 mm × 1050 mm (8.3 in × 41.3 in)
    Lift/Tilt System Variable displacement piston
    Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
    Relief Valve Setting - Lift/Tilt 4757 psi
  • Service Refill Capacities
    Spec Value
    Fuel Tank 181 gal (US)
    Cooling System 31.7 gal (US)
    Crankcase 15.9 gal (US)
    Transmission 31.7 gal (US)
    Differential - Final Drives - Front 49.1 gal (US)
    Differential - Final Drives - Rear 49.1 gal (US)
    Hydraulic System - Tank Only 63.4 gal (US)
    Diesel Exhaust Fluid Tank (Tier 4) 8.7 gal (US)
    Hydraulic System Factory Fill 125.5 gal (US)
  • Buckets
    Spec Value
    Bucket Capacities 5.4-6.3 m3 (7.0-8.3 yd3)
  • Axles
    Spec Value
    Front Fixed
    Rear Trunnion
    Oscillation Angle ±6°
  • Brakes
    Spec Value
    Brakes SAE J1473 OKT90, ISO 3450:1992
  • Hydraulic System - Steering
    Spec Value
    Steering System - Circuit Pilot, load sensing
    Steering System - Pump Piston, variable displacement
    Relief Valve Setting - Steering 4351 psi
    Maximum Flow 71.3 gal/min
    Steering Cycle Times - Low Idle 5.6 s
    Total Steering Angle 80 °
    Steering Cycle Times - High Idle 3.4 s
  • Hydraulic Cycle Time (1,400-1,860 rpm)
    Spec Value
    Rack Back 4.5 s
    Lower Float Down 3.5 s
    Raise 8 s
    Total Hydraulic Cycle Time - Empty Bucket 18.2 s
    Dump 2.2 s
  • Sound Performance - Standard
    Spec Value
    Operator Sound Level (ISO 6396) 71 dB(A)
    Machine Sound Level (ISO 6395) 111 dB(A)
  • Sound Performance - Suppression
    Spec Value
    Operator Sound Level (ISO 6396) 70 dB(A)
    Machine Sound Level (ISO 6395) 109 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
  • Transmission lockout

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, 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 MEUI diesel, turbocharged/aftercooled
  • Ground level engine shutoff
  • Turbine precleaner, engine air intake
  • Radiator, Next Generation Modular (NGMR)
  • 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

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
  • Payload Control System (PCS)

OPERATOR ENVIRONMENT

  • Cab precleaner
  • AM/FM/CD/MP3 radio
  • Satellite Sirius radio with bluetooth
  • LED warning strobe
  • CB radio ready
  • Window pull down visor

MISCELLANEOUS ATTACHMENTS

  • Front and rear roading fenders