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JCB’s Double-Drum Ride-On Rollers Offer Improved Reliability

Thu February 23, 2012 - National Edition
CEG


Both the VMT380 and the VMT430 can be specified with either 51 or 55-in. (129 or 140 cm) wide drums.
Both the VMT380 and the VMT430 can be specified with either 51 or 55-in. (129 or 140 cm) wide drums.
Both the VMT380 and the VMT430 can be specified with either 51 or 55-in. (129 or 140 cm) wide drums. The new rollers benefit from an improved drive system that delivers a 20 percent increase in vibration frequency, to 66Hz.

JCB Vibromax is introducing a range of double-drum ride-on rollers, delivering high frequency compaction with JCB reliability and serviceability. The VMT380 and VMT430 models are both available in two drum widths, creating four distinct machines. With modern styling, a front-mounted engine and JCB Vibromax’s tapered front frame design, they offer lower ownership costs with increased productivity and ease of use, according to the manufacturer.

The four models are the VMT380-130, VMT380-140, VMT430-130 and the VMT430-140, and they feature:

• A robust single-piece exciter shaft design for maximum reliability

• Front-mounted engine with tapered frame for improved visibility and weight distribution

• Maintenance-free center joint and improved service access

• High frequency and high amplitude with multiple vibration options

• Up to 5 percent fuel saving over previous models

JCB Vibromax has redesigned its mid-weight ride-on roller range with a new frame, new engines, revised hydraulics and improved service access. Both the VMT380 and the VMT430 can be specified with either 51 or 55-in. (129 or 140 cm) wide drums. These rollers replace the previous VMT390 and VMT500 in the JCB compaction line-up.

The new rollers benefit from an improved drive system that delivers a 20 percent increase in vibration frequency, to 66Hz, and for rolling speeds that are now up to 10 percent higher than the others. Gradeability has been improved by 42 percent, while all models use a mechanical gear shift for smoother starting and braking, according to the manufacturer.

With a turning radius of 7.8 ft. (2.4 m) for the 51-in. drum machines and 8 ft. (2.4 m) for the 55 inch width models, the JCB Vibromax rollers offer 13 percent better maneuverability than others. Operators can now choose between single-front, single-rear or twin drum vibration, for more control on smooth finish asphalt layers.

New Operator Station

With the engine moved to the front section of the chassis and the larger water tanks now rear-mounted, the VMT machines benefit from a totally new operator station. The ergonomic drive lever now comes with an integrated cutter control, and an optional second drive lever contributes to added versatility. JCB’s automatic vibration control (AVC) system, which cuts off vibration when the roller stops traveling, remains a standard fit on all models.

The machines have three working modes with a detented throttle control for three different frequencies. With less weight and a more efficient vibrator design, the rollers offer up to a 5 percent fuel saving over the previous machines, while a larger fuel tank provides 4 to 8 hours of additional working capability between refills, reducing downtime. The larger 64.7-gal. (245 L) water tank, which has a pressurized water delivery system, also permits longer working between refills.

Service Access

The sturdy locking engine cover is gas-strut assisted for easy access to the engine and drive system. All models benefit from a center articulation joint that is maintenance-free, cutting the requirement for 500 hour greasing intervals. A single-piece exciter shaft also calls for less maintenance and lubrication, reducing service costs. In the event of a breakdown, the VMT models also have a towing pump installed, allowing the rollers to be pulled out of the working area for repair.

For more information, visit www.jcb.com.