
Alternator 55A B21/B23/B230 for Volvo 240 1984-86
240
- Model year:
- 1984–1986
- Engine:
- B21, B23, B230
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Weak headlamps at idle, a charging light that glows, or a battery that constantly runs flat often point to the alternator. On the Volvo 240 with B200 and B230 engines it is belt-driven on the front of the engine, and wear in the pulley groove or an oxidized cable terminal will just as easily cause a charging fault as a tired diode pack.

240
240, 260, 740, 760

240, 260, 740, 760, 960, 940
240, 260, 740, 780, 760, 940, 960

240, 260, 740, 780, 760, V90, 960, 940, S90

240, 260, 740, 780, 760, V90, 960, 940, S90

240, 260, 740, 780, 760, V90, 960, S90, 940

240, 740, 780, 760, V90, 940, S90, 960

240, 260, 740, 780, 760, V90, 940, 960, S90


240, 740

240, 260, 740, 760, 960, 940

240, 740, V90, S90, 960, 940, 850
240, 260, 740, 780, 760, 940, 960

240, 260, 740, 760, 940, 960

240, 260, 740, 780, 760, V90, 960, S90, 940

240, 260, 740, 780, 760, V90, 960, 940, S90, 850

240, 260, 740, 760, 960, 940

240, 260, 740, 760, V90, 940, S90, 960, 850, V70, XC70, S70, C70

164, 240, 260, 740, 780, 760, V90, S90, 940, 960, 850, V70, XC70, S70, C70

PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90, S70, C70
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This category gathers parts for overhaul and mounting of the alternator. The group includes pulleys, capacitors and cable terminals plus screws, washers, lock nuts and flange nuts for mounting, along with protective covers that keep dirt and moisture away from the connector strip.
A common checkpoint during a rebuild is the pulley itself: a worn or glazed groove lets the belt slip, which lowers the charging voltage even with a healthy alternator. While you're at it, replace oxidized cable terminals and a worn capacitor to keep interference and voltage drops down.