20-11-13, 09:54 PM
Some good photo's there David 
.
The hole to hold the oil seal doesn't look too bad to me. The obviously oval part of the casting is just a clearance hole for the push-rod and as long as it is not rubing on the push rod or the bearing inside it doesn't matter what shape it is and will be o.k.
I take it you have not yet tried a new oil seal yet. You might find it is a good fit anyway. But you obviously need to do something about the retaining plate.
I think the main issue with chemical metal is having the parts to be fixed spotlessly clean.
On the subject of welding, is it the oval hole you were thinking of or the recess for the oil seal, approx 22mm dia? If it is that oval hole just leave it for the reason I've just given.
If you are struggling to get the push rod out it is no big deal to get to the other end, but you might need a new gasket for the cover. You just need to take the clutch cover off, then undue the six bolts that hold the clutch pressure plate and remove that plate. The rest of the clutch can stay put. You then lift out a short stepped push rod and catch the 5/16" ball bearing. (Strangley not a metric size). Then you can push the push rod from either side.
If you do it all from the chain side and you are not sure if the ball bearing has dropped out measure the distance from the end of the new push rod to the sprocket cover fitting face. It should be round about 32 to 33mm. If it is 8mm less the ball bearing has gone.
When I mentioned adjusting the clutch cable in a previouse post I should have said it is the adjustment opposite the push rod in the sprocket cover that need some care.
Keep us informed and good luck.
.The hole to hold the oil seal doesn't look too bad to me. The obviously oval part of the casting is just a clearance hole for the push-rod and as long as it is not rubing on the push rod or the bearing inside it doesn't matter what shape it is and will be o.k.
I take it you have not yet tried a new oil seal yet. You might find it is a good fit anyway. But you obviously need to do something about the retaining plate.
I think the main issue with chemical metal is having the parts to be fixed spotlessly clean.
On the subject of welding, is it the oval hole you were thinking of or the recess for the oil seal, approx 22mm dia? If it is that oval hole just leave it for the reason I've just given.
If you are struggling to get the push rod out it is no big deal to get to the other end, but you might need a new gasket for the cover. You just need to take the clutch cover off, then undue the six bolts that hold the clutch pressure plate and remove that plate. The rest of the clutch can stay put. You then lift out a short stepped push rod and catch the 5/16" ball bearing. (Strangley not a metric size). Then you can push the push rod from either side.
If you do it all from the chain side and you are not sure if the ball bearing has dropped out measure the distance from the end of the new push rod to the sprocket cover fitting face. It should be round about 32 to 33mm. If it is 8mm less the ball bearing has gone.
When I mentioned adjusting the clutch cable in a previouse post I should have said it is the adjustment opposite the push rod in the sprocket cover that need some care.
Keep us informed and good luck.