ive been meaning to start a post about my gearbox so here it is the problem with my box was it was noisey in every gear and in neutral untill id press the clutch down and the noise would disappear, i never had any other probs with the box would always select gears and stay in gear without popping out. i took the box out and stripped the nose cone off to find the main shaft bearing nackered alot of play, god nows how this box was selecting gears fine. i havent got the tools to strip the box down and rebuild it so this is what i decided to do I packed the bearing with grease and dye grinded a hole in it then flicked all the balls out then made a sleeve and welded it to the outer bearing case and pulled it out i may have been able to get the bearing out with a puller but i didnt have one that fit and i didnt want to start pushing the mainshaft in causing any damage. when i had this out i thought the next bit would be easy order the bearing, the bearing in it was 002 311 123A this bearing has a seperate thrust washer between it and fourth gear, bearing 091 311 123 can also be used as this one has the thrust washer built into the bearing and you just have to remove the washer from the box. anyway i couldnt get either, bearsmotor sports had 3 left and he needed 4 himself and told me he was having trouble finding any more and when i phoned heritage they had none in stock and would be around 12 weeks till they mite get some. The bearing is a non standard size bearing and cant be ordered off the self so this is what ive done so far well when i say me my dad and his lathe first thing was to buy a bearing near the sizes then machined a piece of steel Then push the bearing in with loctite i dont know if you can see in the pic but two piece of plastic have been cut and fitted in the bearing to stop crap getting in this was then machined down to the correct outer size the next thing was to do the center a top hat like piece when finished this bearing will be like the one with the thrust washer built in this is the finished bearing this is how far we have got at the moment its ready to fit when ive got some bearing lock fingers crossed it will work i will keep this updated as i get on
we managed to do a bit more on the box, so here it is first put the box upright in a workmate with the mainshaft surported up then gave the mainshaft where the bearing locates a clean and then pushed the bearing in with some bearing lock on the shaft then trial fitted the the circlip and measured the gap with some feeler gauges so we could turn up a washer to secure it in its ready to put back together but i really want to fit a new ball bush in the nose cone but cant find a new one this part below
ive been having problems finding a new bush for the hockey stick i can get one in three weeks but i just cant wait that long. so today i had a go at making one the first attempt was out of steel free hand in the lathe with a file and wet and dry it wasnt that bad really but was a bit thinner than it should be then my dad made a cutting tool to do the job first attempt with this was done in brass this was spot so we made the final one for the gear box out of bronze ive now fitted the bush and iam getting all gears ok, so fingers crossed the box will be ok ive fitted the bell house back on and just waiting for my drive flange seals to turn up then its ready to fit back in
Proper engineering - I learned to use a lathe as an apprentice, but having one is another step. Hats off to you and your dad.
just thought i would update how iam getting on with this i have now fitted the box and engine in and have had it running up on axle stands and everything seems ok no nasty noise,s anymore and selecting the gears ok, i should have it out the garage in a few weeks so will update how the box is when in use
If we had one thread like this for every whats the best way to lower my bus thread The late bay would be better for it
