1 tips to reinstall a gear box Fri Mar 14, 2008 5:55 pm
bert
New member
I just replaced the gear box on my K75 with a spare one that I had loaned to a friend.
We are rebuilding the broken one and soon I will be ready to post all my pictures of the repair.
Just for now, I want to give you a trick to re-attach the gear box on the engine.
The most difficult thing is to keep the clutch plate in line with the output shaft of the engine. I had made a special centering tool for this purpose:
If you don't have the luxury to have a centering tool, go to the closest office supply and buy a "Papermate" permanent felt marker. This will do the trick as the diameters are the same.
When the clutch plate is centered, you don't want to move it when trying to insert the gear box input shaft and the clutch push rod. (If you carry the gear box by hand, you will have to try and recenter many times before it's right).
This morning I had an idea and went to get the longest 8mm bolts that I could find.
The idea was to have some alignment pins to have the gear box sliding on it. At the end, I hade to cut the screws to a length of approximatly 90mm (or 3.5"). With my saw, I also made a slot in order to use a screw driver to remove them when the gear box got in place. I installed the drive shaft on the gear box to turn it and line up the splines of the input shaft/clutch.
It worked well and at the first try I was able to re-engage the gearbox on the clutch.
Here are the pictures of the aligment pins:
This is normally a tricky job, and if you don't succeed at the first time, get a big breath, relax and try again. It could be very frustrating.
Bert
We are rebuilding the broken one and soon I will be ready to post all my pictures of the repair.
Just for now, I want to give you a trick to re-attach the gear box on the engine.
The most difficult thing is to keep the clutch plate in line with the output shaft of the engine. I had made a special centering tool for this purpose:
If you don't have the luxury to have a centering tool, go to the closest office supply and buy a "Papermate" permanent felt marker. This will do the trick as the diameters are the same.
When the clutch plate is centered, you don't want to move it when trying to insert the gear box input shaft and the clutch push rod. (If you carry the gear box by hand, you will have to try and recenter many times before it's right).
This morning I had an idea and went to get the longest 8mm bolts that I could find.
The idea was to have some alignment pins to have the gear box sliding on it. At the end, I hade to cut the screws to a length of approximatly 90mm (or 3.5"). With my saw, I also made a slot in order to use a screw driver to remove them when the gear box got in place. I installed the drive shaft on the gear box to turn it and line up the splines of the input shaft/clutch.
It worked well and at the first try I was able to re-engage the gearbox on the clutch.
Here are the pictures of the aligment pins:
This is normally a tricky job, and if you don't succeed at the first time, get a big breath, relax and try again. It could be very frustrating.
Bert