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New wheel loader fills compact niche for JCB.

JCB has added a new model to its B series range of articulated wheel loaders. The new hydrostatically driven model 407B ZX fills out the small end of the company's loader line and its compact design and highly maneuverability allow it to be used in confined areas, according to the company.

"JCB introduced the 407B ZX to meet the market demand for a powerful, compact machine designed to move a precise 1 cu.yd. of material," said Matt Walsh, JCB Inc. wheel loader product manager. "The 407B's performance compares favorably with slightly larger wheel loaders, while capitalizing on maneuverability and operator comfort."

The 407B ZX is manufactured at the JCB Special Products manufacturing facility in Staffordshire, U.K. "The 407B ZX has undergone a North Americanization of sorts," said Walsh. "The engine meets all North American emissions standards and the cooling package has been improved, making the machine more suitable for operation in high ambient temperatures.

"The bucket has been resized to the U.S. customary measurements to insure it holds an accurate 1 cu.yd. volume of material. The articulation joint and components have been significantly strengthened, compared to the original European marketed model, to hold up to the severe North American industrial applications."

The 407B ZX is powered by a four-cylinder Perkins 1004.42 water-cooled diesel engine rated 63 hp (SAE net) at 2000 rpm with 183 lb.ft. of torque at 1200 rpm. The engine is mounted transversely on a sub-chassis for improved operator comfort and safety, according to the company. The engine cooling fan is powered by an Ultra Hydraulics 8.4 cc/rev motor, which is driven by a 10 cc/rev Ultra gear pump mounted to the engine.

"The transverse mounting position of the engine allows the hood design to slope down toward the back of the machine," said Walsh. "The design allows the operator to see an obstruction as close as 7 ft. from the rear of the loader."

The 407B ZX wheel loader uses JCB's Vibration Isolation System (VIS), designed to minimize in-cab noise and vibration. With the use of a sub-chassis, JCB separates the engine and rear axle from the main chassis. Resilient rubber mountings are used to provide four levels of vibration and sound suppression; between the engine and sub-chassis, between the sub-chassis and main chassis, between the axle and sub-chassis and between the cab and the main chassis.

The engine directly drives a Sauer-Sundstrand 55 cc/rev variable displacement piston pump, which powers a Sauer-Sundstrand 109.9 cc/rev two-speed hydrostatic motor designed to match unit power and speed to the application. Top speed for the loader in forward and reverse direction is 12.5 mph in the high range and 5 mph in low range.

The loader control and auxiliary hydraulic pump is a Sauer-Sundstrand 32 cc/rev gear pump that provides a flow of 16.9 gpm, with priority to the steering circuit. The steering system pressure is 2175 psi while the main relief system pressure is set at 3190 psi. Control valves are Husco International three-or four-spool manual units, depending on the customer's specifications.

The hydraulic system has a capacity of 22.5 gal. and is filtered via a 10 micron filter located in the return line from the service loop. The hydraulic cooler is an all-aluminum, two-pass unit from Bliss field Manufacturing.

Manual loader and auxiliary hydraulic controls are manufactured by JCB. One stick controls the loader and bucket control, while a second controls the auxiliary hydraulics.

The 407B ZX uses JCB-manufactured portal axles, in which the wheel hub is positioned below the centerline of the axle. This design provides maximum ground clearance and increased performance and underbody protection, JCB said. Optional limited slip differentials can be provided on either or both axles. The rated axle load capacities are 36,375 lb. static and 12,125 lb. dynamic. The axles include spur gear hub reduction, spiral bevel crown wheel and an

integral drop box on the rear unit.

Primary service braking is dynamic through the hydrostatic transmission, with additional service braking also provided by a hydraulically actuated caliper on a dry disc mounted on the transmission output shaft. The parking brake is a mechanically actuated caliper on the same disc located on the transmission output shaft. Both brakes are supplied by Hayes Brake.

The loader includes analog gauges allowing the operator to monitor fuel level, as well as engine coolant and hydraulic oil temperature. An LCD hour meter is provided. Enclosed cab models include a heater and optional AC system. A KAB cloth suspension seat is provided as standard equipment.

The cab is designed for excellent all-around visibility. A manual loader control lockout and an ignition switch that only operated with the parking brake on is but one safety feature.

The Z-bar loader geometry is designed to provide excellent visibility to the quick hitch and attachments that include pallet forks, high-tip, side tip and 6-in-1 buckets and sweepers. Bucket breakout force is 9923 lb. measured to ISO 8313 specifications while the straight tipping load is 7497 lb. The unit has a wheelbase of 6 ft. 7 in., a minimum ground clearance of 14 in. and a turning radius of 12 ft. 11 in. Operating weight is 9923 lb.

The Zettelmeyer-compatible integrated hydraulic coupler provides the convenience of switching attachments from within the cab, according to JCB. This coupler is also equipped with a diverted valve to operate cylinder-type hydraulic actuated attachments with no additional equipment.

For more information on the JCB 407B ZX wheel loader, contact JCB Inc., 10939 Philadelphia Road, P.O. Box 209, White Marsh, MD 21162. Internet: http://www.jcbna.com
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Author:Mercer, Mike
Publication:Diesel Progress North American Edition
Geographic Code:1USA
Date:Feb 1, 1999
Words:939
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