Komatsu WA800-3 to WA900-3 Tier 2 specifications

History and service record of WA800-3 to WA900-3 Tier 2

• 2007 upgrade. The same museum records that the WA800-3E0 and WA900-3E0 of 2007, large wheel loaders used at mines and in stone crushing, were upgraded for the first time in four years. Komatsu large wheel loader WA800-3E0/WA900-3E0 (2007), Kikki's Workshop, The Museum of Construction Equipment.
• WA800 against WA900. A poster on Heavy Equipment Forums says the WA800 and WA900 are quite the same machine, with the WA900 having a stronger engine and a slightly higher machine weight. Komatsu WA800-3, Heavy Equipment Forums.
• Loading 777D trucks. Another poster shared photos of a WA800-3 that weighs about 100 metric tons and loads Cat 777D trucks. Komatsu WA800-3, Heavy Equipment Forums.
• Joystick steering. One commenter said the Komatsu dealer and Komatsu itself never managed to get the joystick steering to work on the WA900 or WA600. Komatsu WA800-3, Heavy Equipment Forums.
• Owner experience with the WA900. In a separate Heavy Equipment Forums thread an owner said his company has a WA900 with over 10,000 hours on it and loves it, while another poster remarked how much the front end of a WA800 resembles a Hough 580. Komatsu WA 800, Heavy Equipment Forums.
• The 12-cylinder engine. Komatsu's WA800-3 and WA900-3 brochure describes the SAA12V140E-3 as a 12-cylinder, 30.5 litre, turbocharged, air-to-air aftercooled common-rail engine that meets EPA Tier II, making 636 kW (853 hp) in the WA800-3 and 672 kW (901 hp) in the WA900-3. WA900-3 wheel loader, Komatsu Europe.
• Two-mode working hydraulics. A two-mode active working system sends loader-pump flow to the work equipment in powerful loading mode and cuts it during digging so traction rises, and while the boom is raised all loader and switch pump flow goes to the work equipment. WA900-3 wheel loader, Komatsu Europe.
• What they load. Komatsu says the WA900-3 can load its HD985 truck, rated at 105 metric tonnes payload, in four to five passes. WA900-3 wheel loader, Komatsu Europe.
• Weights and buckets. The brochure lists the WA800-3 at 104,500 kg with a 10 to 14 m3 bucket and the WA900-3 at 107,350 kg with an 11.5 to 13 m3 bucket. WA800-3 wheel loader, Komatsu Europe.
• Quieter cab and cooling. Noise is reduced by engine-compartment isolation and a low-speed radiator cooling fan, and the cab sits on silicone-oil-filled rubber mounts to reduce operator fatigue. WA800-3 wheel loader, Komatsu Europe.
• Kick-down and hold switches. The WA800-3 and WA900-3 brochure describes a kick-down switch that downshifts from second to first when a dig cycle begins and upshifts when the direction lever goes to reverse, and a hold switch that keeps the transmission in third or fourth gear. WA900-3 wheel loader, Komatsu Europe.
• Transmission cut-off and boom positioner. The operator can set the transmission cut-off pressure for the left brake pedal from a switch on the right control panel, and a remote boom positioner lets the highest and lowest bucket positions be set from the cab to match any truck body. WA900-3 wheel loader, Komatsu Europe.
• Service filters. The system has full-flow filtration with gear pump-driven forced lubrication, and all fuel and oil filters are spin-on for easy maintenance. WA900-3 wheel loader, Komatsu Europe.

• Komatsu Wa900 Close Up (Heavy Equipment Forums, 2012-04-12)
• Komatsu Wa800 3 (Heavy Equipment Forums, 2011-06-28)