Caterpillar 988K Millyard Arrangement Wheel Loader
Specifications
Engine
Net Power
541hp
Rated Speed
1700rpm
Displacement
1105cu in
Torque Rise
58%
Bore
5.7in
Stroke
7.2in
Emissions
U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent
Net Power - Sae J1349
541hp
Engine Model
Cat C18 ACERT
Peak Torque - 1,200 Rpm
2104lb ft
Gross - Iso 14396
580hp
Peak Power Speed
1,500 rpm
Peak Power Speed - 1,500 Rpm - Gross - Iso 14396
580hp
Peak Power Speed - 1,500 Rpm - Gross - Sae J1995
588hp
Peak Power Speed - 1,500 Rpm - Net Power - Sae J1349
541hp
Operational
Operating Weight
139920lb
Transmission
Transmission Type
Cat planetary power shift
Forward - 1
4mph
Forward - 2
7.2mph
Forward - 3
12.7mph
Forward - 4
21.6mph
Reverse - 1
4.7mph
Reverse - 2
8.3mph
Direct Drive - Forward 3
13.9mph
Direct Drive - Reverse 3
15.8mph
Direct Drive - Forward 4
24.4mph
Direct Drive - Forward 2
7.8mph
Direct Drive - Reverse 2
8.9mph
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Reverse 1
5mph
Reverse - 3
14.4mph
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
13 degrees
Brakes
Brakes
SAE J1473 OCT90, ISO 3450:1992
Operating Specifications
Tipping Load - Straight
78115lb
Tipping Load - Articulated 37 Degrees
68005lb
Service Refill Capacities
Cooling System
31.7gal
Fuel Tank
188gal
Crankcase
15.9gal
Diesel Exhaust Fluid Tank
8.7gal
Transmission
31.7gal
Differential - Final Drives - Front
49.1gal
Differential - Final Drives - Rear
49.1gal
Hydraulic System Factory Fill
125.5gal
Hydraulic System - Tank Only
63.4gal
Hydraulic System - Lift/Tilt
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt
4641 psi
Cylinders, Double Acting - Lift, Bore And Stroke
235 mm 976 mm (9.25 in 38.4 in)
Cylinders, Double Acting - Tilt, Bore And Stroke
292 mm 671 mm (11.5 in 26.4 in)
Pilot System
Variable displacement piston
Lift/Tilt System
Variable displacement piston
Relief Valve Setting
580 psi
Maximum Flow
13.7 gal/min
Maximum Flow At 1,400-1,860 Rpm
153 gal/min
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
74degrees
Relief Valve Setting - Steering
4351 psi
Steering Cycle Times - Low Idle
5.6 s
Steering Cycle Times - High Idle
3.4 s
Maximum Flow
71.3 gal/min
Sound Performance - Standard
Operator Sound Level (Iso 6396)
71 dB(A)
Machine Sound Level (Iso 6395)
111 dB(A)
Sound Performance - Suppression
Operator Sound Level (Iso 6396)
70 dB(A)
Machine Sound Level (Iso 6395)
109 dB(A)
Forks
Fork End Area
69ft2
Dimensions - Millyard Linkage
Ground To Top Of Rops
13.8ft in
Ground To Top Of Exhaust Stacks
13.8ft in
Ground To Top Of Hood
10.9ft in
Ground To Bumper Clearance
3.1ft in
Rear Axle - Centerline To Bumper
10.5ft in
Front Axle Centerline To Fork Tip
15.6ft in
Wheel Base
14.9ft in
Maximum Overall Length
41ft in
Ground To Lower Hitch Clearance
1.9ft in
Ground To Center Of Front Axle
3.2ft in
Fork Height With Level Arms
8.1ft in
Fork Top Clamp Opening
12.3ft in
Fork Height At Maximum Lift
15.3ft in
Hinge Pin Height At Maximum Lift
16.1ft in
Dump Angle At Maximum Lift
39.4degrees
