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
Бб	integrated step - up ratio retarder
Бб	standard propshaft length not affected by the retarder
Бб	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 Б~ 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 .