Concrete Products

JUL 2015

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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94 • July 2015 Caterpillar's new 926M, 930M and 938M models build on K-Series predecessor load- ers—924K, 930K and 938K—with engineer- ing refinements that include new power and exhaust treatment packages meeting Tier 4 Final emission standards, plus standard or optional features aimed at improved value, operator comfort and safety. With the M-Se- ries introduction, the nomenclature for the smallest model in the family changes from 924 to 926, reflecting the increased capabil- ities of the new model, compared with those of the 924H and 924Hz. All three new models have increased engine power and higher tip loads than machines they replace. COMPLIANT POWER A new Cat C7.1 Acert engine powers M-Series wheel loaders and has a Clean Emissions Mod- ule designed to require no operator interven- tion and causing no work cycle disruption. The module uses a fit-for-life diesel partic- ulate filter (DPF) and a selective catalytic reduction system, which requires only the addition of diesel exhaust fluid. DFP regener- ation occurs passively at a low temperature. A step-less, four-range, electronically controlled, intelligent hydrostatic drive sys- tem features operator selected power-train modes, including a conventional Hystat mode with aggressive engine braking; re- fned Torque Converter mode allowing the machine to free wheel down hills and around grades; and, an Ice mode setting tuned to maximize control in slippery underfoot con- ditions. Testing shows the Torque Convert- er mode—the factory default setting—can save up to 5 percent additional fuel in load- and-carry applications. M-Series loaders offer hybrid-type fuel savings by using new power modes, selected via the soft touch button panel: Standard mode offers the same power as K-Series mod- els in ranges 1, 2 and 3 and features a Pow- er-By-Range logic that boosts the available power in range 4 for improved roading speed on uphill grades. In this mode, the engine runs at a lower maximum speed (1,600 rpm versus 1,800-rpm high idle) with no com- promise in peak ground speed. The 200-rpm reduction in engine speed nets fuel savings when compared with K-Series models. Test- ing shows up to 5 percent fuel savings in composite-work cycles and up to 10 percent in specifc applications, such as roading and long load-and-carry applications. The lower maximum engine speed also signifcantly re- duces in-cab sound levels. Performance mode boosts engine speed to 1,800 rpm to achieve maximum engine INNOVATIONS REPORT MATERIAL HANDLING M-Series ushers Tier 4 Final design to Cat's small wheel loaders power in all speed ranges. More power is available for multi-function work, and the resulting increases in hydraulic speed and power allow higher production. GENERATION II LINKAGE The Caterpillar patented, Generation II Opti- mized Z-bar loader linkage on the M-Series models delivers the performance and break- out forces of a traditional Z-bar linkage with the parallelism and load-handling capability of a tool carrier. The Generation II lift-arm design, launched with late-model K-Series machines, enhances overall forward visibili- ty, and the redesigned torque tube on stan- dard lift linkages maximizes visibility when the linkage is above the level-arm position. Higher tipping load ratings for the M-Series small wheel loader models, versus the K-Se- ries, also allow the new models to comfort- ably handle heavier payloads. Electro-hydraulic controls, combined with independent, dedicated, load-sensing variable-displacement pumps for the imple- ment and steering circuits carry over from the K-Series. The M-Series hydraulic system enhances multifunction performance and al- lows features such as fne-mode control for fork and material handling work; push-but- ton programming of lift, tilt, and lower kick-outs; and, electronic dampening at cylinder-end stroke and kick out positions. Controls also allow a new feature, Perfect Parallelism, which uses input from rotary sensors in the linkage to provide level lift with ± 2-degree accuracy for improved site lines to fork tips and higher performance in material handling applications. SAFETY AND CUSTOMIZATION The M-Series small wheel loaders also have optional features designed to enhance pro- ductivity, operator safety, and serviceability. A lighting package includes front and rear LED auxiliary work lights; engine-bay LED lights to illuminate routine service points, such as oil and coolant levels; and, fuel area illumination. A new radar-enabled Object Detection System provides visual and audible alarms to warn the operator of objects close to the rear of the machine. The advanced operator station introduced with K-Series models is further refined for all-day operator comfort and safety. Larger external mirrors feature a lower parabolic section that allows visibility to the rear tires at ground level. Operators can customize M-Series con- trols by using the new, redesigned secondary display, standard on European models. The secondary display is now larger, providing more customization and information. New features include coded start and operator profles, application profles, service-mode and preventive maintenance alerts, indepen- dent fow adjustment for third and fourth hydraulic functions, directional-shift re- sponse, ride-control activation speed, auto- matic-lubrication intervals, bucket-foat ac- tivation, feather-catch mode, rack snubbing, multiple camera inputs, Perfect Parallelism, diesel exhaust fuid level, and remaining time until fuel fll. CAT PRODUCT LINK The Caterpillar telematics solution allows customers, dealers, and enterprise users to determine the location, operation, and Segment-specifc solutions, developed for K-Series models, remain available for the M-Series models to enhance overall versatility. The Aggregate Handler solution includes additional counterweight for greater stability, long-life Performance Series buckets, and optional axle- and gear-box breathers for negotiating settling ponds.

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