Cat® K Series Small Wheel Loaders Feature New Engines, Hydrostatic Drive and Redesigned Loader Linkage
8 May 2012
The new Cat® K Series Small Wheel Loaders—924K, 930K and 938K—are completely redesigned, incorporating new engines that meet Stage IIIB/Tier 4 Interim emissions standards and significant new features that deliver enhanced performance, fuel efficiency and operator comfort. Among the new features are an efficient electronically controlled hydrostatic drive system, new optimized Z-bar loader linkage, refined operator's station and a choice of couplers and buckets for best matching the machine to the application. Predecessor models—924H, 924Hz, 928Hz, 930H, 938H —will be available in markets having lesser fuel quality and less-stringent emissions standards.The Cat C6.6 ACERT™ engine powers the three new K-Series wheel loaders and works efficiently with the machines to deliver fuel savings up to 30 percent, compared with H-Series models. Emissions-control technology includes a diesel particulate filter that utilizes passive regeneration. Passive regeneration occurs continuously during normal operation with no impact on productivity. The C6.6 engine's rated speed setting of 1800 rpm, compared with 2415 rpm for the H-Series, contributes significantly to reduced fuel consumption, lowered sound levels, and reduced wear. An engine-idle shutdown system further reduces fuel consumption.
K-Series models are equipped with a step-less, four-range, hydrostatic drive system that allows independent control of ground speed and engine speed for efficient operation of hydraulically powered work tools. A new creeper control feature further improves low speed operations by allowing the operator to adjusted maximum ground speed down to 1 km/h. An operator-controlled rimpull-control system helps reduce wheel spin and consequent tire wear, and a standard front differential lock enhances traction.
The dedicated load-sensing, variable-displacement pumps for the implement and steering systems reduce horsepower draw for fuel efficiency and improve multifunction performance. The new K Series loaders also incorporate an electronic snubbing feature at end stroke and kick out positions to reduce operating stress. Hydraulic-filter service intervals are extended to 2,000 hours.
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