I have just had the tacho drive in pieces to replace the oil seal and noticed a curious arrangement of washers on the little widget ( I've since seen it referred to as a Spade?) that transfers the drive from the engine to the tacho drive cable. This little thing has a squared off hole at one end for the cable and is a blade at the other end to mate with the engine shaft. Along this widget I have two small copper washers which sandwich a steel circlip, which runs in a groove. In addition to that I also have a fibre washer which goes between the uppermost copper washer and the cable outer. So once the gland nut is tightened, it pulls the cable toward the engine which applies pressure onto the fibre washer, which in turns applies force to the sandwich of copper washers, which then grips the circlip. I've seen lots of instances where a circlip will prevent a shaft going too far into a hole, but have never seen an arrangement like this where the circlip is actually clamped tight and the shaft spins within it?
Is this the standard arrangement?
Thank you very much for your…
Thank you very much for your advice. Rest assured I have just stepped in for the lip seal and will machine the housing to accept it. I have also just bought a PCV valve to hopefully address the problem of crankcase pressure at source. I was just curious about this collection of washers?
- Log in to post comments
Sounds like the PO has been trying to prevent an oil leak at the tacho drive.
All that extra stuff you mention is not normally standard fitment.
Only the clip 60 0494 which fits onto the spade 06 7141 is normally standard.
BTW
the standard O ring is hopelessly inadequate, I found it's better upgrading to the lip seal tacho drive housing 06 7254.