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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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 V 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

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

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)

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