Specification sheet Wheel Loader Ref caterpillar-988k-millyard-arrangement-wheel-loader
Caterpillar 988K Millyard Arrangement
The Caterpillar 988K Millyard Arrangement is a wheel loader with an operating weight of 139,920 lb (63,466.65 kg), and a 541 hp engine.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
139,920lb
63,466.65kg
Engine power
541hp
403.5kW
Net Power ◆Where it sits in its classpercentile · large wheel loaders
Among 39 large wheel loaders (90,000–150,000 lb), the Caterpillar 988K Millyard Arrangement sits at the heavy end of its class:
- Operating weight 139,920 lb heavier than 95% (n=39)
- Engine power 541 hp more powerful than 84% (n=37)
01 Engine Specification
| Net Power | 541hp | 403.5kw |
|---|---|---|
| Rated Speed | 1700rpm | |
| Displacement | 1105cu in | 18.2L |
| Torque Rise | 58% | |
| Bore | 5.7in | 144.8mm |
| Stroke | 7.2in | 182.9mm |
| Emissions | U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent | |
| Net Power - Sae J1349 | 541hp | 403.5kw |
| Engine Model | Cat C18 ACERT | |
| Peak Torque - 1,200 Rpm | 2104lb ft | 2852.7Nm |
| Gross - Iso 14396 | 580hp | 432.6kw |
| Peak Power Speed | 1,500 rpm | |
| Peak Power Speed - 1,500 Rpm - Gross - Iso 14396 | 580hp | 432.6kw |
| Peak Power Speed - 1,500 Rpm - Gross - Sae J1995 | 588hp | 438.5kw |
| Peak Power Speed - 1,500 Rpm - Net Power - Sae J1349 | 541hp | 403.5kw |
02 Operational Specification
| Operating Weight | 139920lb | 63466.7kg |
|---|
03 Transmission Specification
| Transmission Type | Cat planetary power shift | |
|---|---|---|
| Forward - 1 | 4mph | 6.5km/h |
| Forward - 2 | 7.2mph | 11.6km/h |
| Forward - 3 | 12.7mph | 20.5km/h |
| Forward - 4 | 21.6mph | 34.8km/h |
| Reverse - 1 | 4.7mph | 7.6km/h |
| Reverse - 2 | 8.3mph | 13.4km/h |
| Direct Drive - Forward 3 | 13.9mph | 22.4km/h |
| Direct Drive - Reverse 3 | 15.8mph | 25.5km/h |
| Direct Drive - Forward 4 | 24.4mph | 39.3km/h |
| Direct Drive - Forward 2 | 7.8mph | 12.6km/h |
| Direct Drive - Reverse 2 | 8.9mph | 14.4km/h |
| Direct Drive - Forward 1 | Lock-up disabled | |
| Direct Drive - Reverse 1 | 5mph | 8.1km/h |
| Reverse - 3 | 14.4mph | 23.2km/h |
04 Axles Specification
| Front | Fixed | |
|---|---|---|
| Rear | Trunnion | |
| Oscillation Angle | 13 degrees |
05 Brakes Specification
| Brakes | SAE J1473 OCT90, ISO 3450:1992 |
|---|
06 Operating Specifications Specification
| Tipping Load - Straight | 78115lb | 35432.4kg |
|---|---|---|
| Tipping Load - Articulated 37 Degrees | 68005lb | 30846.6kg |
07 Service Refill Capacities Specification
| Cooling System | 31.7gal | 120L |
|---|---|---|
| Fuel Tank | 188gal | 711.7L |
| Crankcase | 15.9gal | 60.2L |
| Diesel Exhaust Fluid Tank | 8.7gal | 33L |
| Transmission | 31.7gal | 120L |
| Differential - Final Drives - Front | 49.1gal | 185.9L |
| Differential - Final Drives - Rear | 49.1gal | 185.9L |
| Hydraulic System Factory Fill | 125.5gal | 475.1L |
| Hydraulic System - Tank Only | 63.4gal | 240L |
08 Hydraulic System - Lift/Tilt Specification
| 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 |
09 Hydraulic System - Steering Specification
| 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 |
10 Sound Performance - Standard Specification
| Operator Sound Level (Iso 6396) | 71 dB(A) | |
|---|---|---|
| Machine Sound Level (Iso 6395) | 111 dB(A) |
11 Sound Performance - Suppression Specification
| Operator Sound Level (Iso 6396) | 70 dB(A) | |
|---|---|---|
| Machine Sound Level (Iso 6395) | 109 dB(A) |
12 Forks Specification
| Fork End Area | 69ft2 | 6.5m2 |
|---|
13 Dimensions - Millyard Linkage Specification
| Ground To Top Of Rops | 13.8ft in | 4.3m |
|---|---|---|
| Ground To Top Of Exhaust Stacks | 13.8ft in | 4.3m |
| Ground To Top Of Hood | 10.9ft in | 3.4m |
| Ground To Bumper Clearance | 3.1ft in | 1m |
| Rear Axle - Centerline To Bumper | 10.5ft in | 3.3m |
| Front Axle Centerline To Fork Tip | 15.6ft in | 4.8m |
| Wheel Base | 14.9ft in | 4.6m |
| Maximum Overall Length | 41ft in | 12.5m |
| Ground To Lower Hitch Clearance | 1.9ft in | 0.6m |
| Ground To Center Of Front Axle | 3.2ft in | 1m |
| Fork Height With Level Arms | 8.1ft in | 2.5m |
| Fork Top Clamp Opening | 12.3ft in | 3.8m |
| Fork Height At Maximum Lift | 15.3ft in | 4.7m |
| Hinge Pin Height At Maximum Lift | 16.1ft in | 5m |
| Dump Angle At Maximum Lift | 39.4degrees |
Method. Figures are manufacturer reference specifications, not measurements. Every value is checked for unit consistency, physically possible magnitude, and plausibility for its equipment class before publication; figures that fail any check are withheld rather than shown, and figures reconstructed from related data are marked above. Imperial and metric figures are reproduced as published, except where a note states otherwise.