JCB goes smaller in a big way.
Both of the new excavators, built at the Compact Products division of JCB in the U.K., were first introduced at Intermat earlier this year. "We saw a growing market, said George Chaney, product marketing manager of compact products at JCB Inc., Savannah, Ga. "The potential for machines that can access extremely tight confines is growing."
Including the collapsible tip-over-protection-structure (TOPS), the 2509 lb. Micro excavator has an overall height of 90 in. while the 2893 lb. Micro Plus excavator measures 92 in. high. By collapsing the TOPS, the height is further reduced, making it possible to fit in a standard doorway or work in a low ceiling area. The compact size of the excavators makes them more maneuverable in small, confined spaces, difficult to access areas or for use on smaller building projects, said JCB.
JCB's Micro and Micro Plus excavators are powered by three-cylinder, Perkins 103-10 diesel engines rated 17 hp at 2200 rpm. The liquid-cooled engines feature Bosch indirect rejection systems and can be fitted with diesel scrubbers and/or catalytic purifiers to reduce exhaust emissions when operating within less ventilated areas, the company said.
The excavators' drive system is comprised of a hydraulic system incorporating a two-section Parker-Hannifin gear pump--one for each side of the machine--and two single-speed piston motors. The tandem pump assembly, which is directly driven off the flywheel drives Transmittal motors on the Micro excavator and Nachi motors on the Micro Plus machine. JCB's 8015 and 8017 1-1/2 ton excavators also utilize this type of hydraulic system, the company said.
The retractable, three-roller undercarriage on the Micro excavator expands from 27.5 in. to 39.4 in. The undercarriage on the Micro Pins excavator expands from 38.1 in. to 53.1 in. The undercarriage can be retracted to operate in narrow areas and expanded to provide additional stability while digging, JCB said. The excavators are provided with dozer blade extensions to expand to the same width as the fully expanded undercarriage. The Bridgestone rubber tracks on the Micro excavator are 7 in. wide, while the tracks on the Micro Plus machine are 9 in. wide.
A third auxiliary pump is used in the auxiliary hydraulic functions with a swing motor that allows the upper structure to rotate around the lower structure. This system controls the boom, bucket, swing and lift. Both excavators have a 360[degrees] slew radius, a boom swing of 140[degrees] and a bucket rotation of 201[degrees] that are activated through separate control levers.
Each excavator model has two dipper options--30 in. or 37 in. for the Micro excavator or 37 in. or 43 in. for the Micro Plus excavator--and each is equipped with a bucket for digging. Bucket sizes range from 6 in. to 35.4 in. depending on the excavator model. The Micro excavator has a maximum digging depth of 76 in., while the Micro Plus excavator maximum digging depth is 85 in.
"There is a growing market for infrastructure rebuilding, repairs to underground utilities and replacing manual hand labor," said Chaney. "Before, there were no machines that could actually fit in very tight confines. People were forced to use hand tools to do very hard arduous work and the ability to use a machine to absorb all that hard work obviously would minimize fatigue and increase productivity and efficiencies."
Along with the Micro and Micro Plus excavators, JCB has also introduced the tracked dumpster. The dumpsters are manufactured by Hinowa S.P.A. for JCB in Italy and offered in three models, the TD7, TD10 and TD10 self-loader (SL) for material transport use.
The TD7 dumpster is equipped with air-cooled Honda GX270 single-cylinder engine rated 9 hp at 3600 rpm. The TD10 and TD10SL dumpsters are both driven by air-cooled Honda GX390 single-cylinder engines rated 13 hp at 3600 rpm.
The hydraulic system incorporates three gear pumps and a Transmittal two-speed track motor. The three-roller undercarriage is equipped with Bridgestone 7 in. wide retractable rubber tracks that use an asymmetrical tread pattern for smooth forward and reverse travel, said the company.
With 10 times the capacity of a wheelbarrow, the TD7, TD10 and TD10SL dumpsters have a maximum carrying capacity of 1566 lb., 1764 lb. and 1654 lb. respectively, said the company.
All three dumpster models use a hydraulic tipping feature to ensure the full load has been discharged. The tipping function works by having the skips of the dumpster tip upwards to a near vertical position.
The TD10SL dumpster also has an optional self-loading feature that allows the machine to fill its own dump body. The hydraulic front shovel allows the operator to self-load the skip by driving into a pile and activating the shovel through band controls.
The TD7, TD10 and TD10SL dumpsters are 29.7 in, 30.9 in. and 31.5 in wide and the TD7 dumpster can be maneuvered through a standard 30 in. doorway. The maximum speed on the dumpsters are 1.8 mph to allow the machine to climb 15 percent grades with a full load without tipping, said the company.
The bucket of the dumpster can be removed to accommodate other attachments such as; log splitter, concrete mixer, farm bed, spraying kit, lawn-mower kit or hydraulic crane, all of which are provided by JCB.
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|Title Annotation:||construction equipment|
|Comment:||JCB goes smaller in a big way.(construction equipment)|
|Author:||Geske, Dawn M.|
|Publication:||Diesel Progress North American Edition|
|Date:||Jan 1, 2004|
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