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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