Wheel Loaders

988K Millyard Arrangement

Overview
Specifications
Equipment

Product Description

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.

Product Specifications

UnitsUSMetric

 

Engine
Net Power
541 HP 403 kW
Engine Model
Cat® C18
Net Power - SAE J1349
541 HP 403 kW
Bore
5.7 in 145 mm
Stroke
7.2 in 183 mm
Displacement
1105 in³ 18.1 l
Torque Rise
58 % 58 %
Rated Speed
1,700 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396
580 HP 432 kW
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
541 HP 403 kW
Emissions
U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent
Peak Torque - 1,200 rpm
2104 lb/ft 2852 N·m
Gross - ISO 14396
580 HP 432 kW
Peak Power Speed
1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - SAE J1995
588 HP 439 kW
Forks
Fork End Area
69 ft² 6.4 m²
Operating Specifications
Operating Weight
139920 lb 63600 kg
Tipping Load - Straight
78115 lb 35500 kg
Tipping Load - Articulated 37°
68005 lb 30910 kg
Transmission
Transmission Type
Cat planetary power shift
Forward - 1
4 mile/h 6.5 km/h
Forward - 2
7.2 mile/h 11.6 km/h
Forward - 3
12.7 mile/h 20.4 km/h
Forward - 4
21.6 mile/h 34.7 km/h
Reverse - 1
4.7 mile/h 7.5 km/h
Reverse - 2
8.3 mile/h 13.3 km/h
Reverse - 3
14.4 mile/h 23.2 km/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 2
7.8 mile/h 12.5 km/h
Direct Drive - Forward 3
13.9 mile/h 22.3 km/h
Direct Drive - Forward 4
24.4 mile/h 39.3 km/h
Direct Drive - Reverse 1
5 mile/h 8 km/h
Direct Drive - Reverse 2
8.9 mile/h 14.3 km/h
Direct Drive - Reverse 3
15.8 mile/h 25.5 km/h
Hydraulic System - Lift/Tilt
Maximum Flow
13.7 gal/min 52 l/min
Pilot System
Variable displacement piston
Maximum Flow at 1,400-1,860 rpm
153 gal/min 580 l/min
Relief Valve Setting
580 psi 4000 kPa
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 32000 kPa
Service Refill Capacities
Fuel Tank
188 gal (US) 712 l
Cooling System
31.7 gal (US) 120 l
Crankcase
15.9 gal (US) 60 l
Transmission
31.7 gal (US) 120 l
Differential - Final Drives - Front
49.1 gal (US) 186 l
Differential - Final Drives - Rear
49.1 gal (US) 186 l
Hydraulic System - Tank Only
63.4 gal (US) 240 l
Hydraulic System Factory Fill
125.5 gal (US) 475 l
Diesel Exhaust Fluid Tank
8.7 gal (US) 33 l
Dimensions - Millyard Linkage
Fork Top Clamp Opening
12.3 ft 3741 mm
Dump Angle at Maximum Lift
39.4 ° 39.4 °
Ground to Top of Hood
10.9 ft 3334 mm
Front Axle Centerline to Fork Tip
15.6 ft 4765 mm
Fork Height at Maximum Lift
15.3 ft 4660 mm
Wheel Base
14.9 ft 4550 mm
Ground to Lower Hitch Clearance
1.9 ft 568 mm
Rear Axle - Centerline to Bumper
10.5 ft 3187 mm
Ground to Center of Front Axle
3.2 ft 978 mm
Maximum Overall Length
41 ft 12502 mm
Ground to Top of ROPS
13.8 ft 4221 mm
Fork Height with Level Arms
8.1 ft 2468 mm
Ground to Bumper Clearance
3.1 ft 933 mm
Hinge Pin Height at Maximum Lift
16.1 ft 4918 mm
Ground to Top of Exhaust Stacks
13.8 ft 4214 mm
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
13°
Brakes
Brakes
SAE J1473 OCT90, ISO 3450:1992
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Relief Valve Setting - Steering
4351 psi 30000 kPa
Steering Cycle Times - High Idle
3.4 s 3.4 s
Steering Cycle Times - Low Idle
5.6 s 5.6 s
Maximum Flow
71.3 gal/min 270 l/min
Total Steering Angle
74 ° 74 °
Sound Performance - Standard
Operator Sound Level (ISO 6396)
71 dB(A) 71 dB(A)
Machine Sound Level (ISO 6395)
111 dB(A) 111 dB(A)
Sound Performance - Suppression
Machine Sound Level (ISO 6395)
109 dB(A) 109 dB(A)
Operator Sound Level (ISO 6396)
70 dB(A) 70 dB(A)
Units:USMetric
Standard Equipment
ELECTRICAL
OPERATOR ENVIRONMENT
POWER TRAIN
OTHER
Optional Equipment
POWER TRAIN
OPERATOR ENVIRONMENT
MISCELLANEOUS ATTACHMENTS

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