Per the below thread and with all the helpful comments, I have ruled out the PTO, sheetmetal, and front pulley & key-way as the cause of the "clanking" in my 122. (thanks all for the help)
I am now looking internal.
What is piston slap?
I recently had a local shop hone the cylinder as it was bored, but not honed and thus eating oil. It does not eat oil, but now I have this "clanking" - pronounced under load and at very low rpm under load.
Any theories?
Anyone know of any good CC shops in NC? I have lost faith in the one new me.
Thanks.
Peter
Matt Gonitzke (Mgonitzke) on Tuesday, June 21, 2005 - 06:53 pm:
Peter S.-
Well, seeing as its a gear drive, it could be the drive clutch. Sometimes that makes the noise you are describing.
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By Terry Busch (Tcbusch) on Tuesday, June 21, 2005 - 05:33 pm:
Peter S,
If the engine makes the noise with the PTO disengaged then its most likely not the PTO. The hammering could also be piston slap, or something internal.
Every Cub has beauty but not everyone sees it."
By jerry harvey "Nines are wild" (Jharvey) on Tuesday, June 21, 2005 - 11:35 am:
Peter S.
Do you have the anti-rattle springs installed on your PTO?
Charlie- Do you have a pic of those springs handy?
JH
By Charlie "Digger" Proctor (Cproctor) on Tuesday, June 21, 2005 - 10:31 am:
Peter S,
Did ya run the engine with the PTO off?
Have you checked the sheet metal to make sure it's not hitting something?
Are you sure you put the engine back together right?
Are you sure the keyway is good on the crank?
And on and on and on?
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"Every Cub has beauty but not everyone sees it."
By Peter S (Pscilipote) on Tuesday, June 21, 2005 - 10:02 am:
I've posted this before, but no luck so far so I will try again.
Have a CC122. I am getting a "clacking" sound from the front of the engine that I cannot for the life of me isolate. I have even tried the old length of garden hose to the ear trick.
When I engage the front PTO, all works, but there comes a sound like someone is hammering metal against metal.
This occasionally happens when the PTO is not engaged (e.g. low RPM and under load).
Have taken the PTO apart and re-assembled twice, but no luck. Front pulley is tight and key is sound.
Recent rebuild on the engine and runs like a champ.
Anyone have such an issue before or an educated guess?
I'm stumped.
Thanks
Peter