JCB Fastrac Alternator Regulator kit 335/A0723 to fit 334/C0640
Fits Fastrc's 3200 Xtra, 3230 Xtra, 4160, 4190, 4220, 8290 and 8330
These alternators on the Sisu engines are good quality and only normally need the regulators and brushes replaced when they fail, and a lot cheaper than buying a new alternator
