[modeleng] Re: Oil Clacks
- From: "alan stepney" <alan@xxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 6 Jun 2006 03:00:33 +0100
I only fit one clack.
I have seen it advised to use two, but
I dont see the reasoning.
In any case, it depends upon the type of pump.
The LBSC type wont allow steam back into the oil tank even if the clack is
faulty, unlike the Martin Evans type that theoretically could.
If well made at the start the clack shouldnt fail, and is certainly well
lubricated.
Alan
----- Original Message -----
From: "Barrie Purslow" <bpduo@xxxxxxxxxxxxx>
To: "Model Engineering List" <modeleng@xxxxxxxxxxxxx>
Sent: Monday, June 05, 2006 10:09 PM
Subject: [modeleng] Oil Clacks
I have always been told that we fit two clacks in the oil delivery from a
mechanical lubricator as "extra security" against water getting into the oil
reservoir. But, if this is the case, why don't we fit two clacks in boiler
feed pipes?
Could it be that the real reason we fit two clacks in the oil supply is that
the clack at the pump outlet is to enable the pump to work and the clack at
the other end of the delivery pipe is to prevent the pipe from emptying
whilst the locomotive is stationary?? (This would mean the cylinders would
be starved of oil when the engine first starts until sufficient running has
been done to fill the pipe).
Barrie Purslow
Warrington U.K.
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