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TR2/3/3A TR-3B Generator Problem?

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My date code is 7 62 for July 1962 and my car was built in August 1962. Since my number is 22704D do anyone happen to know which other numbers besides 22704D are acceptable? I'm looking to buy a new rebuilt generator and don't want to get one that is not right for my car.

I'm afraid that my existing generator may be too expensive to fix since the bottom front mounting hole has been enlarged probably due to an improper bolt being used and vibration. I think it may be more economical to buy a rebuild and save mine for parts.

Art
 
The earlier 22258 (C39PV-2) will also fit and work, although it might be best to use the matching control box. IIRC it is rated for 19 amps instead of 21 for the C40 and C40-1.

Also worth noting, any 22704x is functionally equivalent to your 22704D. The final letter indicates only minor changes in construction, all letters (eg 22704A) will interchange (even though the individual parts might not interchange).
 
af3683 said:
My date code is 7 62 for July 1962 and my car was built in August 1962....I'm afraid that my existing generator may be too expensive to fix since the bottom front mounting hole has been enlarged probably due to an improper bolt being used and vibration. I think it may be more economical to buy a rebuild and save mine for parts.
Click to expand...
If I were you, I'd save it regardless and keep your eye out for another "bad" 22704 or 22700 with a good front plate. Those two generators share virtually all parts, according to my Lucas Master Catalogue.
 
Andrew Mace said:
Those two generators share virtually all parts, according to my Lucas Master Catalogue.
Click to expand...

Curious. It actually shows that they share <span style="text-decoration: underline">all</span> the listed parts. I wonder what changed?
 
I just got of the phone with TRF and the one rebuilt generator that they have in stock for a TR-3 has the number <span style="font-weight: bold">#22715J </span>which is not correct per the prior postings. Is there a chance that this number is also a replacement in addition to #22704 and #22700?? Thanks.

Art
 
Should be fine. 22715 is listed as a later C40-1, and 22700 is listed as a replacement for it. The Lucas catalog I checked shows the 22715 as original equipment for a 71 Herald.

PS, you will probably need to keep your old pulley, though. Replacements are available separately I believe, if your old one is damaged.

PPS, watch for the little spacer that goes between the fan & generator. It's easy to lose or forget.
 
Could someone please explain how to get the pulley and fan off of the old generator. I'm not sure if it is wise to grab on to the fan blades to stop the motor from turning. There has to be a trick. Thanks.

Art
 
There are several approaches, kind of depends on the tools you have available. An impact wrench works a treat, if you have one handy. I generally use one of these https://www.harborfreight.com/2-piece-rubber-strap-wrench-set-94119.html just so I don't have to mess with firing up the compressor. Or in a pinch, you can use an old fan belt and something to pinch it, like vise grips or the bench vise.

Once the nut is off, generally it only takes a few love taps with a brass hammer to get the pulley off the shaft. If yours is stuck tighter than that, I would suggest using a bearing separator or a puller similar to this: https://www.britishcarforum.com/bcforum/u..._on_#Post855114

With the pulley out of the way, pry the Woodruff key out of its slot (side cutters work well for this, or you can use a small chisel as a pry bar) and lift away the fan & spacer.
 
TR3driver said:
...With the pulley out of the way, pry the Woodruff key out of its slot... and lift away the fan & spacer.
Click to expand...

On mine I seem to recall that the fan and spacer were notched to fit over the woodruff key so this step may or may not be necessary depending on what all you're doing.
 
I was able to get the pulley and fan off with the help of a friend with a impact wrench. However, Randall and George both mentioned a small "spacer" between the fan and pulley. I did not see such a spacer! Can any one describe what it looks like. I checked the Moss catalog and did not see it either. Thanks.

Art
 
Think I found it. There was a small washer about 1/4 inch thick with a space in it that was still on the shaft. I assume that is it.

Art
 
That sounds right. It goes between the fan & bearing, not between the fan & pulley. Without it, the fan will rub on the front plate. Not shown in any of the catalogs (nor available separately) AFAIK, but important. Even the Lucas Master catalog only shows it as part of a "sundries" kit.
 
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