Construction Equipment Guide
470 Maryland Drive
Fort Washington, PA 19034
800-523-2200
The Caterpillar 988K is a large wheel loader designed for high-production material handling in mining, quarry, aggregate, and heavy construction applications. It is part of Caterpillar's 988 series and is built for loading trucks, stockpiling, and moving bulk materials over short distances. The 988K features a Cat diesel engine, hydraulic loader system, articulated steering, and a heavy-duty frame for demanding site conditions. Common attachments include general-purpose and rock buckets. The model is known for its large payload capacity, operator visibility, and service access. It is classified as a wheel loader in Caterpillar's heavy equipment lineup.
| Breakout Force | 98,421.00 lbs ft (133,439.20 nm) Starting 2023 Model Year |
| Bucket Capacity | 6.5 - 13.5 (5.0 - 10.3) Starting 2024 Model Year |
| Bucket Capacity cu. yd. (cu m) | 8.3 - 10.0 (6.3 - 7.6) Starting 2016 Model Year |
| Engine | C18 Starting 2023 Model Year |
| Engine Power | 541 (403) Starting 2019 Model Year |
| Engine Power hp (kw) | 541 (403) Starting 2016 Model Year |
| Engine type | Cat C18 Starting 2024 Model Year |
| Full-Turn Tip Load | 79,435.00 lbs (36,031.15 kg) Starting 2021 Model Year |
| Full-Turn Tipping Load | 79,435.00 lbs (36,031.15 kg) Starting 2023 Model Year |
| Max Dump Height | 11.3 (3.4) Starting 2019 Model Year |
| Max Dump Height ft.( m) | 6.8 (2.1) Starting 2016 Model Year |
| Net Power | 538.00 hp (401.19 kw) Starting 2023 Model Year |
| Operating Weight | 112,574.00 lbs (51,062.77 kg) Starting 2021 Model Year |
| Operating Weight lbs (kg) | 112,574 (51,063) Starting 2016 Model Year |
| Tip Load | 63,404 (28,760) Starting 2024 Model Year |
| Travel Speed | 24 / 25.4 mph Starting 2024 Model Year |
| Travel Speed(Fwd/Rev) | 24 / 25.4 mph Starting 2021 Model Year |
| Front | Fixed |
| Rear | Trunnion |
| Brakes | SAE J1473 OCT90 ISO 3450:1992 |
| Bore | 5.70 in (14.48 cm) |
| Displacement | 1,105.00 cu in (18,107.75 cu cm) |
| Engine Model | Cat C18 ACERT |
| Gross - ISO 14396 | 580.00 hp (432.51 kw) |
| Make | Cat |
| Net Power | 541.00 hp (403.43 kw) |
| Net Power - SAE J1349 | 541.00 hp (403.43 kw) |
| Peak Power Speed - 1,500 rpm - Gross - ISO 14396 | 580.00 hp (432.51 kw) |
| Peak Power Speed - 1,500 rpm - Gross - SAE J1995 | 588.00 hp (438.48 kw) |
| Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 | 541.00 hp (403.43 kw) |
| Peak Torque - 1,200 rpm | 2,104.00 lbs ft (2,852.60 nm) |
| Rated Speed | 1700 rpm |
| Stroke | 7.20 in (18.29 cm) |
| Torque Rise | 58% |
| Dump | 2.2 seconds |
| Lower Float Down | 3.5 seconds |
| Rack Back | 4.5 seconds |
| Raise | 8 seconds |
| Total Hydraulic Cycle Time - Empty Bucket | 18.2 seconds |
| Lift/Tilt System | Variable displacement piston |
| Maximum Flow at 1,400-1,860 rpm | 153.00 gpm (579.11 lpm) |
| Pilot System | Variable displacement piston |
| Steering Cycle Times - High Idle | 3.4 seconds |
| Steering Cycle Times - Low Idle | 5.6 seconds |
| Steering System - Circuit | Pilot load sensing |
| Steering System - Pump | Piston variable displacement |
| Cat Truck Match - High Lift | 773-775 |
| Cat Truck Match - Standard | 770-772 |
| Rated Bucket Capacity | 8.30-10.00 cu yd (6.35-7.65 cu m) |
| Rated Payload | 27,557.80 lbs (12,500.02 kg) |
| Rated Payload - High Lift | 27,557.80 lbs (12,500.02 kg) |
| Rated Payload - Standard | 27,557.80 lbs (12,500.02 kg) |
| Tipping Load - Articulated 37 degrees | 68,005.00 lbs (30,846.59 kg) |
| Tipping Load - Straight | 78,115.00 lbs (35,432.41 kg) |
| Cooling System | 31.70 gal (119.98 l) |
| Crankcase | 15.90 gal (60.18 l) |
| Diesel Exhaust Fluid Tank | 8.70 gal (32.93 l) |
| Differential - Final Drives - Front | 49.10 gal (185.84 l) |
| Differential - Final Drives - Rear | 49.10 gal (185.84 l) |
| Hydraulic System - Tank Only | 63.40 gal (239.97 l) |
| Hydraulic System Factory Fill | 125.50 gal (475.02 l) |
| Transmission | 31.70 gal (119.98 l) |
| Machine Sound Level (ISO 6395) | 111 dB(A) |
| Operator Sound Level (ISO 6396) | 71 dB(A) |
| Machine Sound Level (ISO 6395) | 109 dB(A) |
| Operator Sound Level (ISO 6396) | 70 dB(A) |
| Direct Drive - Forward 1 | Lock-up disabled |
| Transmission Type | Cat planetary power shift |