Volvo Compact Retarder VR 3250
FM , FH Series
Technical Data

Step - up ratio
i = 2 . 03

Max . braking torque
at the retarder shaft
at the propshaft
1600 Nm
3250 Nm

Maximum speed
at the propshaft
2500 rpm

Standard operation
5 - stage hand - brake switch
stage 1 = automatic mode
( downhill cruise control )

Operating medium
oil ( see fuel specification )

Fill rate
5 . 4 l

Control medium
compressed air

Reservoir pressure
7 - 10 bar

Unit weight incl . flange , heat
exchanger without operating
medium
approx . 59 kg

Nominal voltage
24 V

Flange connection
to DIN or SAE standard


1
gearbox
2
step - up gear
3
input shaft
4
rotor
5
stator
6
gearbox - independent retarder
oil supply system
7
heat exchanger
( stainless steel )
8
propshaft


Other Product Features



integrated step - up ratio retarder

standard propshaft length
not affected by the retarder

heat exchanger with integrated
gearbox - oil cooling

The Volvo Compact Retarder has been
developed in inter - firm cooperation
between Volvo and Voith .


braking action retarder + engine brake ( EPG )
Volvo FH 12 4 ~ 2
GCW 40 tonnes
axle RAEV 01 , ratio 3 . 10 : 1
tires 295 / 80 R 22.5



in case of cold retarder oil

retarder + engine brake 2300 rpm


retarder + engine brake 1500 rpm

constant braking

retarder + engine brake 2300 rpm


retarder + engine brake 1500 rpm


VEB ( Volvo Engine Brake ) 2300 rpm

VEB ( Volvo Engine Brake ) 1500 rpm
The diagram shows the engine braking effect
with VEB ( FH 12 , FM 12 ) for comparison .
Combination VEB with Retarder VR 3250
is currently not available .




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