Master cylinder replacement or repair

[salty]

Lots of threads on this already, but not much useful information on finding a replacement. 
 

One of my original paramount master cylinders is acting like the check valve failed. If I push hard and quick it grabs good and holds forever, but if I press slowly it just sinks to the floor and nothing. I replaced all o rings and nothing changed. The “shake-proof washer” is not broken and everything seems fine. 
 

Not sure what to do at this point. Not getting any hits on a replacement paramount, cleavland or gerdes. 

[MB65E]

I’m about to do mine. There are a few on eBay. If mine does the same I’ll flip you for them.

Plane parts has a nice reseal kit. 

-Matt

[salty]

8 minutes ago, GEE-BEE AEROPRODUCTS said:

I can mfg per sample new assys 

GB

 

stop trying to repair old junk

 

I have done the three versions of the Beechcraft 

 

made under owner produced parts

You will fill out ac43.14 form

 

Not sure what you are saying here exactly. You need the old one to duplicate? Any estimate for cost?

[salty]

14 hours ago, MB65E said:

I’m about to do mine. There are a few on eBay. If mine does the same I’ll flip you for them.

Plane parts has a nice reseal kit. 

-Matt

I can see one - in Brazil. 

[salty]

4 minutes ago, GEE-BEE AEROPRODUCTS said:

875.00/1075.00

pair 

How else can I duplicate?

You didn’t say duplicate, that’s why I asked. Your message was fairly cryptic. 

[MB65E]

https://www.ebay.com/itm/Mooney-Aircraft-Brake-Master-Cyl-MLG-PN-V1-15-625-CH-PARAMOUNT-/154298788922?_trksid=p2349624.m46890.l49286

-Matt

[salty]

7 hours ago, GEE-BEE AEROPRODUCTS said:

What wears is the bore and the rod get bent

dont rebuild old junk 

GB

 

iam going to pma the beech models if my der gets off his ass.

 

mfg per sample ?

What about the internals? Are you fabricating everything but the orings or using other off the shelf parts?

[salty]

2 hours ago, MB65E said:

https://www.ebay.com/itm/Mooney-Aircraft-Brake-Master-Cyl-MLG-PN-V1-15-625-CH-PARAMOUNT-/154298788922?_trksid=p2349624.m46890.l49286

-Matt

Is that a replacement for a 850012-501? I don’t see anything correlating the two. 

[MB65E]

V1-15-625-CH is the part number in my airplane. 
One is a paramount part the other might be Cleveland. 
-Matt

[salty]

A second rebuild of the master cylinder resolved my problem. The “shake-proof” washer was not providing enough pressure to engage the check valve. After bending it so that it provided sufficient pressure the master cylinder is now working perfectly again. 

[MB65E]

Do the paramount cylinders have the leather check valve thing as mentioned in other posts? The IPC states it’s as an oring. Mine was assembled incorrectly by Muncie Aviation. They had the aluminum puck flipped, they only used 3 orings and a washer was missing. I ordered two of the last new brass washers that I was missing. Duncan Aviation actually had NOS parts for the paramount actuators. 

[JoeM]

Plane parts referred me to Bill Goetschel, an IA who overhauls and tests the original paramount cylinders. He repairs or replaces the poppet valve (the brass one which presses the fluid down to the wheel cylinder and which is NOT included in the O ring overhaul kit). He prefers calls or texts at 507-581-9761. He also sells replacement master cylinders on Ebay. When returned, he provides a log entry showing the overhaul with a place for your A&P to sign that he installed it. Mine worked perfectly.