Date:         Tue, 20 Oct 2015 23:24:00 -0700
Reply-To:     Neil N <musomuso@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Neil N <musomuso@GMAIL.COM>
Subject:      Re: Continuous Duty Solenoid vs Starter Solenoid; Visual
              Difference?
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
In-Reply-To:  <BAY405-EAS411A50FC5D2CDDC3FDF3509A0380@phx.gbl>
Content-Type: text/plain; charset=UTF-8

Thanks Dennis.

Reading about solenoids as used in landing gear here:
http://saginawwings.com/monty-answerman/relay.htm

this excerpt shed some more light:

"The intermittent [solenoid] contacts are made to break large starter motor
currents and therefore has a lower resistance coil which makes more force
to "snap" the main contacts open and closed."

Neil.

On Tue, Oct 20, 2015 at 8:41 PM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> These "ignition" solenoids, (relays) are common for trucks, busses, RVs,
> industrial equipment etc. For these applications there are many things that
> need high current control including manifold pre-heaters and glow plugs to
> get engines started to air tank drain valve heaters to keep them from icing
> up in winter. They are for continuous duty.
>
> The duty refers to the coil design. Relays designed for starters that do
> have built in solenoids such as those found on older Fords are designed for
> short term operation, under a minute and to operate under lower voltages
> during the starting process where battery voltage may drop as low as 8-10
> volts. Continuous operation of these starter relays at >13 volts usually
> does them in around 5 to 10 minutes. If really unlucky the melt down will
> short the coil out and since most do not fuse these coil circuits you will
> get to deal with other damage. Use the alternator warning light circuit as
> is often done on a Westy and you also get to replace the alternator and
> that blue wire.
>
> Dennis
>

--
Neil n

Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>

1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>

1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>

Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>