Ed_Wischmeyer
Well Known Member
So here's the deal...
Time came to overhaul one of the Matco brake master cylinders, and it turns out that they will overhaul all four for cheap -- $125, including shipping them back to me, versus $52 for four overhaul kits.
They told me that the conventional way of mounting the master cylinders to the rudder pedals -- one long bolt with a washer stackup(s) -- can put side loads on the master cylinder and lead to wear. What they recommend is a bolt with threads all the way to the head so a nut can be threaded on all the way to rigidly mount the bolt to the rudder pedal. This eliminates standard AN bolts in the lengths needed. The rest of the washer stackup would be the same.
They recommend a Grade 8 steel bolt, and to be compatible with the AN hardware, that would be 10-32 diameter and thread. Plans call for 7/8" and 1 1/8" length, four each (dual brakes).
Can't find em!! Closest I could come was stainless, and my IA said no. I did find some 10-24 (IIRC) hex heads at Lowe's, but not enough of them and no matching nuts. They were out... (I did find a lot of empty plastic envelopes in the drawers, indicating significant pilferage...)
Anybody got any *specific* leads that they know work?
Time came to overhaul one of the Matco brake master cylinders, and it turns out that they will overhaul all four for cheap -- $125, including shipping them back to me, versus $52 for four overhaul kits.
They told me that the conventional way of mounting the master cylinders to the rudder pedals -- one long bolt with a washer stackup(s) -- can put side loads on the master cylinder and lead to wear. What they recommend is a bolt with threads all the way to the head so a nut can be threaded on all the way to rigidly mount the bolt to the rudder pedal. This eliminates standard AN bolts in the lengths needed. The rest of the washer stackup would be the same.
They recommend a Grade 8 steel bolt, and to be compatible with the AN hardware, that would be 10-32 diameter and thread. Plans call for 7/8" and 1 1/8" length, four each (dual brakes).
Can't find em!! Closest I could come was stainless, and my IA said no. I did find some 10-24 (IIRC) hex heads at Lowe's, but not enough of them and no matching nuts. They were out... (I did find a lot of empty plastic envelopes in the drawers, indicating significant pilferage...)
Anybody got any *specific* leads that they know work?
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