Pokeys fan issue resolved, keeping the bus, generator rebuild?

[one_dusty_hoot]

I had a '74D-4cyl and a '77D-5cyl. Never heard of the
pencil loop but that is not to say it did not exist.
On a 4 Cyl John Deere I put a large relay close to the
glow pugss, large wire to the relay and large wires to
the glow plugs, PB controlled the relay w/12v. The
voltages given were real world from an 8.0 Onan which
as soon as I get off my duff will be changed. See if
you can get ahold of some high temp wire covering or
with shield.

bob janes, '87fc35, greenville, sc




--- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> The two different kinds (series/parallel or loop/pencil) that I am
> familiar with are on Mercedes diesels. The Series/loop kind are
> older and less efficient. The parallel/pencil type are newer and
> more efficient. On the series kind, 12volt is applied to the first
> plug, it flows thru the plug, heats the loop, out of that plug and
> on to the next one with very heavy gauge wire with the final plug
> grounded to the block. There are insulators at the top of these
> plugs to stop the incoming electricity from jumping over to the
> outgoing wire without passing thru the loop. These plugs lose a
lot
> of heat in the wires that join them together (you can see the wire
> glow red). If a loop burns out, all the plugs stop working. I am
> almost certain these are the style of plugs on my 82 Perkins.
> The pencil/parallel plugs each receive 12 volts independent of the
> other plugs and each is grounded to the block (I think). No heat is
> lost in the wires that join them together. They are much more
> efficient and if one burns out, the others still function since
they
> are independently grounded.
> I converted my 77 Mercedes 300d from series to parallel and cold
> weather starting improved immensely.
>
> Kerry
> 82 FC35
> Denver
>
>
> --- In WanderlodgeForum@yahoogroups.com, "one_dusty_hoot"
> wrote:
> >
> > Glow plugs* I don't know how you would wire them in series,
> > as far as I know that is not possible.
> >
> > Now is you are talking about the wire being in series with
> > each plug the, answer is yes, but!
> >
> > Here's the but.. glow plugs use a tremendous amout of current
> > for a short period of time, something in the order of 6-8 AMPS.
> > depending on the plug and to the voltage applied at the cap/tp.
> >
> > If the wire coming in from the power source was attached to
> > plug number ONE, then a wire to plug number TWO, then THREE
> > and so on there is a voltage drop on each wire depending on
> > the current flow, an example may be 9.5V-8.2V-6.8V and so on.
> > As you can see the voltage=heat would drop as you continued on
> > down the line. (If I were to call it in series it would be this
> > arrangment but it is not actually in series as each plug has
> > voltage to ground so the plugs are wired in parallel no matter)
> >
> > You can check with a voltmeter to see if the voltage drops.
> > A better way of wiring is from the source to each glow plug
> > individually with large enough wire to carry the current, or,
> > have a huge copper bar or line attached to each glow plug, here
> > again with a large enough wire to the source to handle the
> > current.
> >
> > You can forget the ohmmeter for checking these plugs even if
> > you have one out and in your hands. The resistance is so low
> > that an ohmmeter on X1 will read zero (0) thinking of course
> > that you have a short from cap to shell.
> >
> > I have checked glow plugs with a good battery and jumper cables.
> > Attach to the battery, connect the black to the shell, the red
> > to the cap. WATCH OUT! The tips get extremely hot in just a few
> > seconds. Don't keep the voltage on too long. If they glow cherry
> > red at the tip first then toward the shell and not pitted or
> > erroded badly, they are good. If they don't heat or are badly
> > erroded they are bad.
> >
> > You can well imagine the load on the battery with 3 or 4, even
> > 6 or 8 glow plugs, many AMPS, batteries have just ran a marathon,
> > now you ask then to fire the starter, hey!, give me a break!
> >
> > There is something else you can do to aid starting a diesel with
> > glow plugs and that is to add a relay, pust button, then
> momentarily
> > use the button on/off until the motor is running well.
> >
> > bob janes, '87fc35, greenville,sc
> >
> >
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, Doug Engel
> > wrote:
> > >
> > > Is there any reason not to run an individual wire to each glow
> > plug, like off of a bus bar? Doug
> > >
> > > davidkerryedwards wrote: On the other
> > series glow plug engines I have owned, the heavy wires
> > > joining the plugs glowed red when they were operating. With the
> > > series plugs, when one fails, they all fail.
> > > Does anyone know if there is a parallel pencil glow plug
> retrofit
> > > system for the Perkins. In my experience parallel glow plugs
are
> > > far more efficient.
> > >
> > > Kerry
> > > 82 FC 35
> > > Denver
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "Troy Tikalsky"
> > > wrote:
> > > >
> > > > How do we verify the glow plugs are actually working?
> > > >
> > > > Troy Tikalsky
> > > >
> > > > ----- Original Message -----
> > > > From: Tom Warner
> > > > To: WanderlodgeForum@yahoogroups.com
> > > > Sent: Wednesday, December 06, 2006 10:12 PM
> > > > Subject: Re: [WanderlodgeForum] Re: Pokeys fan issue
resolved,
> > > keeping the bus, generator rebuild?
> > > >
> > > >
> > > >
> > > > As Ernie can tell you the Perkins starts at very cold
> > > temperatures IF
> > > > you know how to start it. First make sure that the glow plugs
> > > > actually work. If you want the diesel to start right then you
> > > need to
> > > > do the correct preventative maintainance on the generator. If
> it
> > > > smokes there is a reason. Depending on the hours you may have
> to
> > > > remove the injectors and either clean or replace them. YOu
> need
> > > a
> > > > good air filter that is clean, and if you have the vertical
> one
> > > that
> > > > needs to have oil in the bottom, make sure its at the proper
> > > level.
> > > > Treat the Perkins right and it will out last both of
> us.
> > > I
> > > > rebuilt my control box and it made a significant difference
in
> > > > starting reliably.
> > > >
> > > > tom warner
> > > > vernon center,ny
> > > > 1985 PT 40
> > > >
> > > > At 09:02 PM 12/6/2006, you wrote:
> > > > >Glad to hear you are as sick minded as the rest of us. How
> many
> > > > >hours does the Perkins
> > > > >have on it? Could the smoking be causes by the altitude? Are
> > > your
> > > > >glow plugs working
> > > > >right? I'd do a compression check before rebuilding it, but
> I'd
> > > > >probably just keep using it
> > > > >as long as it started fine and produced electricity.
> > > > >The one distinct advantage of a non-diesel generator, is
that
> > > in
> > > > >very cold temperatures,
> > > > >the generator will start more reliably and then you can use
> > > that
> > > > >power to run the block
> > > > >heater on the car (when there's no access to electricity).
> > > > >
> > > > >Kerry
> > > > >82 FC 35
> > > > >Denver
> > > > >
> > > > >--- In WanderlodgeForum@yahoogroups.com, "doug_ngl"
>
> > > wrote:
> > > > > >
> > > > > > Hey gang,
> > > > > > Just thought I'd share a success. After testing the
> switch,
> > > checking
> > > > > > for current at the fan, jumpering power to the fan to see
> if
> > > I had a
> > > > > > functional hi speed mode, and finally pulling the dash, I
> > > found a poor
> > > > > > connection at the gang plug connecting the switch harness
> to
> > > the fan
> > > > > > harness. Cleaned it and used dielectric grease, works
like
> a
> > > champ.
> > > > > > Just another note, after much thought, I've decided to
> keep
> > > Pokey,
> > > > > > at least for now. I did have her listed for sale, but the
> > > darn thing
> > > > > > keeps growing on me. I guess it's a sickness we all
share.
> > > So let the
> > > > > > spending begin!
> > > > > > Lastly, the 12.5KW genset works well, but smokes a fair
> > > amount,
> > > > > > mostly at startup. I don't forsee useing it much, but it
> is
> > > a nice
> > > > > > option. I have considered rebuilding the Perkins, or
> > > replacing the it
> > > > > > with a propane fired unit...any words of advice??
> > > > > > Doug Engel, Gunnison, CO, 1981 FC35SB, "Pokey"
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> > >
> > >
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam? Yahoo! Mail has the best spam protection around
> > > http://mail.yahoo.com
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>