The Komatsu WA250-6 wheel loaders have a Komatsu SAA6D107E-1 turbocharged, aftercooled, six-cylinder, Tier-III/Stage-IIIA-certified engine producing 138 flywheel horsepower (FWHP). They have a hydrostatic transmission and four-wheel drive. They come standard with a variable traction control system, ROPS/FOPS cab, wet disc brakes, and an equipment management monitoring system (EMMS).
The Komatsu WA250-6 has an operating weight of 25,441 to 25,904 pounds (11,540 to 11,750 kg) and a bucket capacity of 2.5 to 3.5 cubic yards (1.9 to 2.7 m3). The Komatsu WA250PZ-6 has an operating weight of 26,808 to 27,778 lbs (12,160 to 12,600 kg) and a bucket capacity of 2.5 to 3.0 yd3 (1.9 to 2.3 m3).
The WA250-6 has an open hydraulic system with a gear-type pump that delivers fluid at a rate or 20.6 gallons (78 L) per minute at a system pressure of 3,000 lbs per square inch (PSI) (20,600 kPa). The WA250PZ-6 delivers 29.1 gallons (110 L) per minute at 2,700 PSI (18,615.8 kPa).