Wednesday, October 22, 2008
Monday, October 20, 2008
Wednesday, October 15, 2008
Saturday, October 11, 2008
Tuesday, October 7, 2008
I put a casing screw into the end of the shaft and used this to pull and push the shaft to test the end float. Usually you would have to tap the outer bush inwards to take up any float. I was fortunate that with the case screws tightened and the card in place there was just discernable end float with no binding.
I am happy with set up so the loctite can be left to set. A bit of time at this point to file the breather/bush profile to match would be beneficial but any swarf has to cleaned thoroughly away.
Looking at the camshaft there was no bad wear on the profiles or the shafts so could be re-used. Light dressing with an oilstone took a small wear burr off of the end of the smaller inner shaft and avoided the shaft dragging through the bush on re-assembly.
The reason for the angle of tilt was to keep the timing bush oilway at the base of the bush vertical. This was then used to check the non return valve which is on the opposite (inside) side. The valve was removed and cleaned thoroghly and a new 1/4 ball bearing and spring reseated before assembly. The oilway was then filled with thin oil and left to see if it remained in the valve and not leaking out past the seated ball bearing seal. The valve worked so the retaining grub screw was loctited into place.
The observant might notice that some bushes/bearings should have been fitted into the heated case before the valve was assembled. However, wear means that with the exception of the sleave gear bearing in the gearbox all other bushes were a tight hand fit, with a tap at the end to seat, and all have to be loctited into place on re-assembly. This means the only heat required is at the gearbox end to fit the bearing and as this will be fairly localised it should not effect the non-return valve. I would like to have made a set of slightly oversize bushes throughout but have no access to a lathe and need to keep the engineering favours to a minimum as I need to convert the timing side bush later, and get the small end bush reamed while still attached to the crank.