|
I will be replacing my crankshaft pulley soon and I'll have a look at how does the pulley interface to the key/crankshaft gear. So right now I'm only speculating below.
Without looking at the actual thing (I looked at part photos), I guess that if you have a desktop grinder, a set of coarse and fine files and a throwaway lathe cutter, you'd be able to do the job. Here's what I'd do:
1. File an artificial key slot in the crankshaft gear if doesn't have one. Do it precisely. You want to put the gear in a vise and precisely scribe marks on the gear so that your new key slot will be properly aligned.
2. Use the cutter as your steel piece. Grind it out into a key. Do it *very slowly* -- don't overheat or the cutter will loose its harndess/temper. Have a jar/can of water standing by and cool the piece down every few seconds. Make the key fit the crank pulley properly.
3. Use the key and the modified crankshaft gear together.
Alternately, as a much cheaper hack, I'd:
1. Drill a 4mm hole (or two, in opposite locations) in the crankshaft pulley and the crankshaft gear. You want to lock them together after aligning them properly.
2. Put shank of a used drill bit in it as a locking pin. Use loctite thread locker for the pin so that it doesn't slide out.
Drill the hole as far away from the crankshaft's center axis as possible, but still where the both parts touch each other directly.
These are all "hacks", but they may work. I once did that kind of a job on some machinery where the original key was sheared off, and there was a gear pair that had to stay locked together and to the driveshaft. I can report whether it would work as soon as I get to removing my crank pulley. I have to wait for the new one to arrive, and for the crank locking tool as well.
I don't know whether it will work on the particular pulley/gear pair you're looking at, but that would be what I'd try doing if I had to.
I keep my fingers crossed that my key isn't sheared/broken, then I'll have to do it as well (unless I can afford a new timing belt crankshaft gear).
Cheers, Kuba
|
