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Post by Jethro5 on Jan 11, 2024 10:17:03 GMT 1
Could somebody who has refurbished a 250 1/2 inch master cylinder confirm 100% they normally have the extra small relief hole. I have been attempting to clear the place where it looks like there is a hole with no luck. I ground down a hacksaw blade small enough to fit though the small hole in a 350 master cylinder. However I cannot push it through the 250 master cylinder hole. Looking down the bore I cannot see any sign of a hole as I can on the 350.
The unit has the sight glass that clips in.
Therefore I want to confirm before I damage something.
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Post by chrisg on Jan 11, 2024 17:55:31 GMT 1
Yes there are 2 holes. I used a piece of wire from a wire brush held with some pliers to clean out the small hole. It is known for blocking and prevents the pads from returning.
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Post by Jethro5 on Jan 11, 2024 21:53:56 GMT 1
Thanks for confirming. Thought it must have one but it is solid. I’ll persevere.
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Post by Gitram on Jan 12, 2024 15:06:34 GMT 1
had similar recently, the hole was solidly blocked and i couldn't poke through the hole, soaked the MC in vinegar, whether that helped or not, who knows but was then able to get a thin welding nozzle tip cleaner into the hole to clear out the blockage..
marti
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Post by chrisg on Jan 13, 2024 16:21:49 GMT 1
A last resort would be to use a micro drill, best guess 0.5mm dia. , but be careful not to snap it or you will be a world of poop.
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Post by Jethro5 on Jan 14, 2024 23:42:01 GMT 1
Ended up getting it clear by grinding down an old Allen key that I could fit through the 350 hole. Then carefully tapped through with a hammer. It was seriously blocked. No way a strong wire would have cleared it.
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Post by chrisg on Jan 15, 2024 13:15:24 GMT 1
Ended up getting it clear by grinding down an old Allen key that I could fit through the 350 hole. Then carefully tapped through with a hammer. It was seriously blocked. No way a strong wire would have cleared it. Every day is a school day.😉 |
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Post by Gitram on Jan 15, 2024 16:01:47 GMT 1
Ended up getting it clear by grinding down an old Allen key that I could fit through the 350 hole. Then carefully tapped through with a hammer. It was seriously blocked. No way a strong wire would have cleared it. glad you got that sorted.. it's the simple things that sometimes throw you off track and you know that you are right but there's a doubt.. which is why there are no silly questions.. I tried mine with the usual bit of copper wire but it wasn't strong enough to go through the blockage. marti |
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