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let the games begin - R69s engine rebuild
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
- Has thanked: 1 time
Re: let the games begin - R69s engine rebuild
Finally got that front web sitting acceptably parallel with the centre web. Learnt a few things there.
In the process tweaked my data collection sheet again. Not much of a change but refinement.
Here it is for those who find it interesting.
Mal
Toowoomba- Australia
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
- Has thanked: 1 time
Re: let the games begin - R69s engine rebuild
Now I have to sort out the flywheel.
I have the correct slightly lighter R69s flywheel to fit against a new crank.
So more runout questions.
So now the crank trueing stand gets new tops to cope with the extra weight of the flywheel.
Mal
Toowoomba- Australia
Re: let the games begin - R69s engine rebuild
Re: let the games begin - R69s engine rebuild
Dave
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
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Re: let the games begin - R69s engine rebuild
Dave
You are probably right.
In the past when reassembling a flywheel to a crank where they had seen service as a pair I have done what you recommend.
However this crank has never been matched to this flywheel and I dont know how well they will play together.
What was in my mind was that if I need to use some valve grinding paste to get this flywheel to seat properly on this crank then I would prefer to do that before I have the crank fitted into the crankcase. That way I can been more confident of keeping everything uncontaminated.
We will see what we see, I guess.
Thanks for taking the time to comment.
Mal
Toowoomba- Australia
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
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Re: let the games begin - R69s engine rebuild
Today I thought I would check out the clearance between the back of the flywheel and the rear main engine bearing.
So out with the new oil slingers. Poor fit. mmmmmmmm.
The problem is that the way the reproduction slingers have been pressed the part that is meant to snug into the crankshaft won't sit in correctly.
So I made a press tool and tweaked the slinger and now I have a perfect fit.
I did made a video clip of the process but was unable to upload video to this page.
Mal
Toowoomba- Australia
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
- Has thanked: 1 time
Re: let the games begin - R69s engine rebuild
Now I am measuring up all the clearances involved in fitting the new crank into the crankcase.
Of course one can just look in the manual and see, place 3.6mm front spacer and 2mm rear spacer........ assemble.
However past experience tells me that one does not want the front slinger to rub on the front bearing carrier or the rear oil slinger to touch the rear bearing carrier.
So I draw up a scale drawing with the actual measurements and see what dimension spacers I need and also if the front bearing carrier needs tweaking.
Also this allows one to ensure the conrods sit as equally centred on the bores as possible given the crank assembly. In this case the conrods are sitting very close to spot on.
Next step is to calculate out the front shim thickness required.
Toowoomba- Australia
- malmac
- Posts: 796
- Joined: Sun Jun 29, 2014 2:10 am
- Location: Toowoomba, Australia.
- Has thanked: 1 time
Re: let the games begin - R69s engine rebuild
Just need to look at the oil slinger clearance.
and of course need to confirm the rear bear carrier will sit well with the rear oil slinger if I use the 2mm spacer.
Toowoomba- Australia
Re: let the games begin - R69s engine rebuild
Dave
Re: let the games begin - R69s engine rebuild
Dave