
Bosch generator carbon brush kit for Volvo B4B
PV 444, Duett
- Model year:
- 1947–1957
- Engine:
- B4B
- Info:
- Dynamo, 6V
- Quantity per car:
- 2
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Weak or unsteady charging on a B4B is often a sign of worn brushes or a tired bearing in the Bosch generator – both are among the natural wear points on the early 6-volt system in the 444 and 445. This category gathers spare parts for overhauling this particular generator type.

PV 444, Duett

Duett, Amazon

PV 444, PV 544, Amazon, 1800, 140, 164, 240, 260

PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90

PV 444, PV 544, Duett, Amazon, 1800, 164

PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90

PV 444, Duett, PV 544, Amazon, 1800, 164, 780

PV 444, PV 544, Duett, Amazon, 1800, 164
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The group includes brush sets, ball bearings, nuts plus spring and toothed washers. During a rebuild, the length of the brushes, the surface of the commutator and the play in the bearings are typical inspection points before the generator is refitted. Since the 544/445 with B4B runs 6 volts, you should check that the parts fit the version and your model year before ordering.