HD325-8 - Mechanical Trucks | Komatsu America Corp HD325-8. The HD325-8 is a 40.3 ton capacity workhorse. Very maneuverable, the MacPherson-strut-type front suspension gives the HD325-8 the tightest turning radius in its class. With two working modes the operator can most effectively take advantage of the fully automatic seven-speed transmission with lock-up HD405-8 - Mechanical Trucks | Komatsu America Corp HD405-8. The 44.1 ton capacity HD405-8 features the same technology that puts large Komatsu haul trucks ahead of the pack. Seven-speed, fully automatic K-Atomics transmission with lock-up, a hydro-pneumatic suspension system and oil cooled multi-disc brake retarder give the HD405-8 the outstanding performance expected from a Komatsu product.
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