Ford Tractor Dynamo 22 Amp C40 Lucas Type 22756. For models 2000 2600 3000 3600 4000 & 5000. Part reference 3109419R91, 81816845, C7NN10000C & 22756. 12v 22 amp Dynamo direct replacement for the Lucas C40 22756 Dynamo. These dynamos come with the tacho drive mounted on the back, the fan and pulley will need to be removed of the old dynamo. With these dynamos being the open type that are prone to allowing moisture in which over time causes the dynamo to not be as efficient and eventually fail. This particular dynamo is designed to be fitted with a fan on the front to allow for cooling allowing the dynamo to work at its maximum capacity. Quiet often the tacho cable ends can ware causing it too slip in the drive unit. The dynamo will require being polarised once fitted, the dynamo needs polarizing to ensure it matches the polarity of the control box, if this isn’t done then the dynamo wont work. The dynamo comes with instructions on how to do this. Order before 1pm for same day dispatch. See our other listings for a comprehensive range of Series and Defender decals, badges, switches, gauges, lights etc. Emberton Imperial has been a long standing family business, supplying Land Rover and classic car parts worldwide since 2002 and enjoying them far longer than that! We are always looking for new and interesting parts so more listings are being added all the time. Any questions, we are always happy to help!