Instruksjonsbok Volvo A25D - A30D

Drive Combinations

6x4 & 6x6 The A25D and A30D offer a choice between 4- and 6- wheel drive (6x4 and 6x6). 4-wheel drive is used in good operating conditions and results in less tire wear, less drivetrain wear and reduced fuel consumption. 6-wheel drive is used in tough operating conditions and on steep grades. 6-wheel drive and all differential locks can be engaged on the move without stopping the hauler, which means higher productivity and lower operating costs since the operator can always choose the optimal drive combina- tion for the existing operating conditions. Five operating modes The A25D and A30D are equi p ped with transverse differ- ential locks on all axles, a longitudinal differential lock in the dropbox and a 6x6 lock in the front bogie axle 1. 6x4, all differential locks disengaged 4-wheel drive is used in good operating conditions and results in less tire wear and reduced fuel con- sumption. This is the most frequently used drive com- bination. 2. 6x6 with longitudinal differential lock in the dropbox • Climbing grades. • Rough terrain. • Slippery underfoot conditions. • Downhill operation (automatic engagement when retarder pedal is pressed). This is the second most used drive combination. 3. Transverse differential lock on front axle only The front axle’s differential lock may be engaged inde- pendently of the other differential locks and is used on slippery surfaces to enhance steering ability or together with 6-wheel drive on soft ground. 4. 6x6 with longitudinal differential lock in the dropbox and transverse differential lock on front axle engaged • Increases steering ability on slippery surfaces. • Makes it easier to run the machine out of deep ruts. • May be necessary in certain dumping situations, for example, dumping up a grade and in slippery condi- tions. 5. 6x6, all differential locks engaged Used in extremely tough operating conditions or as an extra traction boost if there is risk of getting stuck. . Advantages • 4-wheel drive for less tire wear, less drivetrain wear and reduced fuel consumption. • One optimized drive combination for every type of operating condition. • All drive combinations can be activated on the move.

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