Development of the F-series, to replace the E-series, was driven by a requirement to meet the new Tier 4i (US) and Stage IIIB (Europe) emissions legislation, but the manufacturer has taken the opportunity to improve performance and add new features.
The six-model series from the 24-tonne A25F up to the 39-tonne A40F.
Articulated steering gives operators outstanding control of the machine through both its high steering force off road and also its accurate, safe operation on highways, Volvo says, and the self-compensating hydro-mechanical system minimises turning circles.
New dumping functions include detent body lowering and adjustable tipping angle. Using the onboard Contronics control system, operators can set the maximum tipping angle and, therefore, overall height of the body. Applications where this might be useful include working under electrical wires, in tunnels or underground, Volvo suggests.
The electronically controlled, six cylinder turbo charged Volvo V-ACT diesel engines is cleaner than before and also 4% more fuel efficient, it is claimed.
Automatic Traction Control (ATC) comes as standard to prevent operators leaving their haulers permanently set in all-wheel drive mode when not necessary. ATC automatically disengages the rear axle when it is not needed, eliminating tyre skid when cornering and reducing tyre wear. However, when ATC detects any slippage, the longitudinal differential lock and the 6X6 clutch are engaged together for optimum traction.
The F-Series is fitted with four ‘dog clutch’ differential locks – one longitudinal in the drop box and three transversal in the axles, which help maximize grip. When applied in combination, they ensure all wheels rotate at the same speed, maximizing traction in severe operating conditions, such asdeep mud. The drive mode with all differential locks engaged can be turned on or off, by pressing a convenient floor mounted button while the vehicle is moving, for greater ease of use and productivity.
The A25F and A30F are fitted with fully hydraulic brakes and dry discs on all wheels, while the bigger A35F and A40F are fitted with oil cooled wet discs. Additionally, all machines feature retarders. The A25F and A30F feature a hydraulic retarder and Volvo Engine Brake (VEB) – the latter consisting of a compression brake and exhaust retarder. The larger A35F and A40F also feature VEB, but instead of a hydraulic retarder use the wheel brakes. The retarder function helps to control speed while hauling downhill, before curves or crossroads, reducing the need of service brake use and minimizing their wear.
Volvo Construction Equipment has also reported an operating profit of SEK 6.18 billion (£594m) for 2010, reversing the loss of SEK 4.01 billion (£385m) seen in 2009.
Volvo F-series articulated haulers
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