MOSS Replacement master cylinder

[jgoss]

Can anyone tell me the correct fitting and flare for the Master Cylinder (180-670) Moss sells for Spridgets?
I have replaced mine and am having trouble with both fittings leaking at the master cylinder.
Is the flare the Bubble?

Thanks in advance!

jgoss

 

[Gerard]

Tandem master cylinder for 948 Sprite is a bubble flare. You're using for drum or disc?

 

[DrEntropy]

Disc or drum shouldn't make a difference to the flare fitting at the M/C. Pressure is pressure, a seal is a seal.

Are the lines new? How were the flares made?

Reason I ask is: when the flare is made, particular attention should be made to relieve any stress riser points on the tubing end before squeezing the flare or it will hair-line split. Smoothing the end on O.D. with fine wet-or-dry and I.D. a fine round "Swiss file" to eliminate any rough, sharp or irregular edge.

 

[Gerard]

I didn't say or imply it made a difference. Just asking.

 

[DrEntropy]

I didn't say or imply it made a difference. Just asking.

Gerard, I wasn't bein' snarky, please don't interpret it as such. Just that it seemed incongruous to have the two details tied together.

 

[jgoss]

It's disc.
The lines are old. Don't know about original. They did not leak on the old MC.
Thanks for that.
I am thinking about replacing them. Want to make sure I form the flares right.

Great post here on doing it:
https://www.mgexperience.net/phorum/read.php?3,1318708
Gerard I think you are on there.
Thanks again!
jg

 

[Gerard]

I didn't say or imply it made a difference. Just asking.

Gerard, I wasn't bein' snarky, please don't interpret it as such. Just that it seemed incongruous to have the two details tied together.

OK, cool... thanks for the clarification. Easy to misconstrue stuff sometimes.

 

[Gerard]

It's disc.
The lines are old. Don't know about original. They did not leak on the old MC.
Thanks for that.
I am thinking about replacing them. Want to make sure I form the flares right.

Great post here on doing it:
https://www.mgexperience.net/phorum/read.php?3,1318708
Gerard I think you are on there.
Thanks again!
jg

Yes, I am on MGE too. If you have not seen my disc brake upgrade info page, you may want to review it here:

https://gerardsgarage.com/Garage/Tech/DbrakeUg.htm

 

[Bayless]

Thanks for the link Gerard. Very informative.

 

[Gerard]

Thanks for the link Gerard. Very informative.

Thanks...

 

[HAN8L1965]

I had my master cylinder re-done by white post and I had all new stainless lines made. The only leaks I had were at the master cylinder. I finally really cranked them down and that was the end of the leaking.

Mark

 

[TraceZ]

What tool are you guys using to access the flare nuts on the MC? I had to modify a crowfoot flare wrench to fit in that tight space.

 

[Billm]

The 6-point crowfoot that hooks onto a socket extension works best for me.
I just saw a complete set of them at Harbor Freight for about $11.00 - the 5/8" one works really well on the temp gauge bulb on the engine head too!
BillM

 

[tomshobby]

What tool are you guys using to access the flare nuts on the MC? I had to modify a crowfoot flare wrench to fit in that tight space.

Hi TraceZ,
I know where Madison is!