Deere wheel loaders

Beyond Tier 4, how else have OEMs been improving wheel loaders since resolving after treatment?
John Deere intros 844K-III and Aggregate Handler config with improved hydraulics, buckets
John Deere intros 524, 544 and 624K-II wheel loaders with new 5-speed gearboxes, load-sensing hydraulics
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How 3- to 8-cu. yd. wheel loaders settled into a period of refinement
WHEEL LOADED: Latest Tier 4 Final wheel loaders offer much more than fuel efficiency improvements