New CAT Equipment

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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Product Specs

Engine

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
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP
Emissions U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent
Peak Torque - 1,200 rpm 2104 lb/ft
Gross - ISO 14396 580 HP
Peak Power Speed 1500/min
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP

Forks

Fork End Area 69 ft²

Operating Specifications

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

Transmission

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

Maximum Flow 13.7 gal/min
Pilot System Variable displacement piston
Maximum Flow at 1,400-1,860 rpm 153 gal/min
Relief Valve Setting - Main 580 psi
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 4641 psi

Service Refill Capacities

Fuel Tank 188 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)
Hydraulic System Factory Fill 125.5 gal (US)
Diesel Exhaust Fluid Tank 8.7 gal (US)

Dimensions - Millyard Linkage

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

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13°

Brakes

Brakes SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

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

Sound Performance - Standard

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

Sound Performance - Suppression

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