988K Millyard Arrangement

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. The 988K Millyard Arrangement is designed to meet the demands of millyard applications. The features of the 988K Millyard work together to provide a durable and reliable machine to meet the needs of the modern millyard.

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Engine

Net Power 541HP
Engine Model Cat® C18 ™
Net Power - SAE J1349 541HP
Bore 5.7in
Stroke 7.2in
Displacement 1105in³
Torque Rise 58%
Rated Speed 1700/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541HP
Emissions U.S. EPA Tier 4 Final/EU Stage V Technology or Tier 2 Equivalent
Peak Torque - 1,200 rpm 2104lb/ft
Gross - ISO 14396 580HP
Peak Power Speed 1500/min
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588HP

Operating Specifications

Operating Weight 139920lb
Tipping Load - Straight 78115lb
Tipping Load - Articulated 37° 68005lb

Transmission

Transmission Type Cat-Planetenlastschaltgetriebe
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
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

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13°

Hydraulic System - Steering

Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Relief Valve Setting - Steering 4351psi
Steering Cycle Times - High Idle 3.4s
Steering Cycle Times - Low Idle 5.6s
Maximum Flow 71.3gal/min
Total Steering Angle 74°

Service Refill Capacities

Fuel Tank 188gal (US)
Cooling System 31.7gal (US)
Crankcase 15.9gal (US)
Transmission 31.7gal (US)
Differential - Final Drives - Front 49.1gal (US)
Differential - Final Drives - Rear 49.1gal (US)
Hydraulic System - Tank Only 63.4gal (US)
Hydraulic System Factory Fill 125.5gal (US)
Diesel Exhaust Fluid Tank 8.7gal (US)

Forks

Fork End Area 69ft²

Hydraulic System - Lift/Tilt

Maximum Flow 13.7gal/min
Pilot System Variable displacement piston
Maximum Flow at 1,400-1,860 rpm 153gal/min
Relief Valve Setting - Main 580psi
Cylinders, Double Acting - Tilt, Bore and Stroke 292 mm × 671 mm (11.5 in × 26.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke 235 mm × 976 mm (9.25 in × 38.4 in)
Lift/Tilt System Variable displacement piston
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt 4641psi

Dimensions - Millyard Linkage

Fork Top Clamp Opening 12.3ft
Dump Angle at Maximum Lift 39.4°
Ground to Top of Hood 10.9ft
Front Axle Centerline to Fork Tip 15.6ft
Fork Height at Maximum Lift 15.3ft
Wheel Base 14.9ft
Ground to Lower Hitch Clearance 1.9ft
Rear Axle - Centerline to Bumper 10.5ft
Ground to Center of Front Axle 3.2ft
Maximum Overall Length 41ft
Ground to Top of ROPS 13.8ft
Fork Height with Level Arms 8.1ft
Ground to Bumper Clearance 3.1ft
Hinge Pin Height at Maximum Lift 16.1ft
Ground to Top of Exhaust Stacks 13.8ft

Sound Performance - Standard

Operator Sound Level (ISO 6396) 71dB(A)
Machine Sound Level (ISO 6395) 111dB(A)

Sound Performance - Suppression

Machine Sound Level (ISO 6395) 109dB(A)
Operator Sound Level (ISO 6396) 70dB(A)

Brakes

Brakes SAE J1473 OKT90, ISO 3450:1992

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 (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, 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
  • Swing out radiator system with 6 fpi radiator cores
  • Auto-reversing fan with adjustable controls and manual cycle
  • Hinged, perforated side doors
  • 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

Note
  • Standard and optional equipment may vary. Consult your Cat dealer for details.
Power Train
  • -50° C (-58° F) antifreeze
  • Engine oil change system, high speed, Wiggins
  • Engine block heater 120V or 240V
  • High ambient cooling - software
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
  • Fast fill fuel system (Shaw-Aero)
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