Operator`s manual

OPERATION
334
Volvo Variable Geometry Turbo Brake
The variable geometry turbo brake is standard with the Volvo 11F and
13F engine. It uses software to close the variable geometry
turbocharger to create retardation.
For both variable geometry turbocharger and engine
brakes, use a “one gear” driving strategy when going
downhill to keep engine speed up for effective braking
(for example: uphill in 7th gear and downhill in 6th).
Transmission Retarder, VHD Only
DO NOT use the retarder on wet or slippery roads.
The retarder may cause vehicle to slide and cause
an accident which could result in injury or death.
Apply the retarder only when engine is at closed
throttle.
Observe transmission and engine temperatures.
Select the lowest possible transmission range in order
to maximize the cooling system capacity and
retarding. If overheating occurs, decrease the use of
the retarder and use service brakes instead. Check
the retarder overtemp light.
vn-vhd.bk Page 334 Tuesday, July 1, 2008 9:44 AM