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-----Original Message-----
From: MVTrucker@aol.com <MVTrucker@aol.com>
To: Military Vehicles List <mil-veh@uller.skylee.com>
Date: 06 March 2000 12:22
Subject: Re: [MV] M-35,Air Reservoir Drainage Kit Question
>I wonder if those automatic pressure release valves that keep the tanks
>drained could be used.
>
It seems these have been here since at least the 60's, the FV620/2/3/4 air
sense/receiver tank is so fitted. Most air brake parts are usually
Clayton-Dewandre here and this small diaphragm unit is a standard part.
Essentially it is a simple equilibrium valve screwed into the bottom of the
receiver allowing any liquid to drain into its lower chamber. A decrease in
pressure has the diaphragm seal the air receiver owing to the increased pressure
on the outlet side of the diaphragm and finally opens this chamber to atmosphere
ejecting any liquid.
Having cycled like this the receiver pressure now reverses the diaphragm sealing
the outlet and opening the receiver connection. Each application of the brakes
or standing idle with dropping pressure has the valve purge the receiver.
Anyone with a FV620/2/3/4 is well advised to check the correct operation of this
valve by slowly draining the receiver air - operating one auxiliary air driven
wiper will do, and observing that a small puff of air is vented from the valve
every few seconds as tank pressure is reduced. A relatively quiet environment
and engine off is needed to observe this.
Richard
(Southampton - England)
This archive was generated by hypermail 2b29 : Tue Apr 04 2000 - 21:57:07 PDT