Brake master cylinder rebuild help.

[bigbikerrick]

Hello Folks, The rear master cylinder on my Convert has a small drip, of fluid. This will be my first time taking apart/rebuilding a master cylinder. I have ordered the rebuild kit from MG Cycles. Is there any good tutorial/instructionsl on how to do it? Any tips anyone would like to share, on pitfalls to avoid, etc...
Thanks in advance,
Rick. D.

[guzzisteve]

It's covered pretty well in the G5/Sp1000 manual. I'm analog though.

[bigbikerrick]

Thank you Steve, I will check that  manual out. Dont feel bad....I am "analog" also, Sir!
Rick

[guzzisteve]

Hey, I actually use paper bound manuals up to 05.

[bigbikerrick]

Well, I got the master cyl. off and taken apart. Removing the piston was a bit of a bugger, it took a bit of "persuasion" with a small punch and hammer.  I found a you tube video, for rebuilding the MC on a Ducati darmah, which was helpful, as the two are similar. The workshop manual, like Steve suggested was also helpful.
Below is a link to the helpful video, in case anyone is interested.
https://www.youtube.com/watch?v=8OQz4f5MS9U

Rick.

[guzzisteve]

You'll be using that hammer again to put the locking washer in place.

[n3303j]

Make sure the bore is not pitted before installing the new rubber parts.

I've also seen it recommended that one replace that cap and float with a sealing cap and rubber bellows to keep moisture out of the brake fluid.

[bigbikerrick]

Thanks ,Gentlemen, for the suggestions.much appreciated.
Rick D.

[guzzisteve]

It helps if you push piston in when you are putting in the cupped seal & lockring washer(also cupped). I push in w/screwdriver down the center of a 13mm or size that fits, then hit end of the deepwell socket home. That way you are not pushing in the piston w/socket and seal can get all the way home w/o interference.

[bigbikerrick]

Thank you very much, Steve. That makes sense. This is a fine example,of the kind of "hands on" advice I was looking for. Its the little details like that, which make a big difference in the final outcome, and help us ham fisted mechanics, keep these cool old bikes on the road. I will be receiving my rebuild kit soon, and feel confident, that ,with all the sage advice received here, it all goes smoothly.
Rick D.

[guzzisteve]

You need 3 hands for it or a holder like a vice.

[bigbikerrick]

Ok, I think I will use a little 4" vice I have to hold the master cylinder body, while I work on re assembly. Good tip!
Rick.