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Leaky R14 valve
I did a 60 mile trip yesterday. Got back home at 6pm. This morning at 8am both primary and secondary brake pressures where down to 40psi, This bus normally takes a month to go from 120 to 100psi.
I got my soapy water and went looking for my R14h relay valve back between the drive and tag axles. Sure nuff!(see pic). I was planning to change it soon anyway. They’re cheap,
My question is: mine seems to be indexed differently than what I’m seeing online. When I purchase the new R14h valve, can I unbolt the top half from the bottom half, turn it 90 degrees, then bolt it back together?
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6 Replies
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That’s a Prevost or Ben dix question. On page 45 of the catalog linked below there are several configurations shown and listed, and a little voice inside my head says you might be able, but the top is not symetrical and I doubt if Prevost takes each one apart rather than making the support bracket in the correct orientation.
http://www.bendix.com/media/documents/BW1114QuickReferenceCatalog.pdf
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Most of the time when R14 is changed you have to turn the cap or top part to have fittings be turned the right way , just make sure no dirt gets in or around the washer
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Thanks for verifying that Peter and thanks for the catalog file Jon.
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I rebuilt my leaky R14(H) brake relay valve and 1 of my three R12(H) brake relay valves. The other two were replaced by a previous owner.
I purchased the 2 rebuild kits on ebay, delivered to the door in 3 days for less than $25ea. The Bendix part# is 102802 and is for both valves.
I cleaned the exterior of each in my abrasive cabinet w/aluminum oxide and the inside w/mineral spirits. It took about 2 hrs total per valve.
1st pic is of the R14 ready to come off, and the 2nd is of it rebuilt and its old parts next to it.
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I thought it easier to rebuild the valves than replace them because I didn’t have to remove the fittings from the old and reinstall them, perfectly indexed, in the new.
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That’s not a bad idea for a spare to carry with you. Ive had a seal go out on one of mine, forcing me to get a rebuilt one in a flat, featureless state. Cost me a premium, plus they had to do a work around to get the standard valve configuration to come close enough to mount properly.
Once I got it back east, had all of them (including the refurbed one) replaced with proper setups.
Having a rebuild kit with me could have allowed the work to be done in the field.
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