Generator vibration

[Gregory OConnor]

Vibration was the clue. Lost isolator may only be a result and
not 'the' problem.
Greg94ptCa


--- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
<scottforman75@...> wrote:
>
> SUCCESS!
>
> I suspected that the fan might be my big vibration source, and
after
> disconnecting power to it and running the motor I was right.
>
> The vertical radiator and fan on the PT's are designed as a sub-
> assembly that comes out in one piece. This subframe attaches to
the
> coach at three places...two under the radiator and one furter in
> towards the centerline. The two mounts under the radiator are
rubber-
> isolated mounts, and even after all these years they are still
doing
> a good job of minimizing vibration transfer. The culprit, though,
> was the third point. There was a plain metal pin attaching the
> subframe to a vertical frame member that is attached to the main
left
> side frame rail. Vibration from the fan was passing right through
> that pin, up the vertical member, and into the main frame. Since
the
> steering linkage passes through this frame rail, it was allowing
> transfer into the steering column and into my hands on the wheel.
>
> To address this problem, I used a floor jack to support the
subframe
> and removed the metal pin. In its place, I inserted a bolt inside
a
> length of small rubber hose. With the hose acting as an isolator,
> the amount of vibration transferred into the frame is greatly
> reduced. I am very happy with the results.
>
> Score one for shade tree engineering.
>
> Scott Forman
> 86 PT38
> Shakin a little less in Memphis
>
> --- In WanderlodgeForum@yahoogroups.com, Hisham Amaral
> wrote:
> >
> > Scott
> >
> > Mount dampening and isolation in our case is experimentally
done,
> We do not have the tools needed to do any computer designs to get
the
> best dampening results. Therefor we have to experiment with
different
> mounts to get the desired result. My advise is to play with
different
> durameter rubber mounts that will get you what you want in
dampening
> the vibration you are getting from your Gen set. I would call
> (BB) CCW Engineering to see if they have any off the self mounts
that
> can replace your existing mounts or would they suggest a vendor
that
> can work with you to improve your condition.
> > I retired from automotive engineering 2 years ago and do not
have
> any contacts in that area
> > I will make a few calls to my old friends at Chrysler to see if
we
> can get any additional information that can lead you to an
acceptable
> results.
> > Will talk again soon, and good luck,
> >
> > Hisham Amaral
> > 97 WLWB Michigan
> >
> > --- On Sat, 10/4/08, Scott Forman <scottforman75@> wrote:
> >
> > From: Scott Forman <scottforman75@>
> > Subject: [WanderlodgeForum] Generator Vibration
> > To: WanderlodgeForum@yahoogroups.com
> > Date: Saturday, October 4, 2008, 8:11 PM
> >
> >
> >
> >
> >
> >
> > Does anyone have any good tricks for reducing vibration from the
> > Yanmar/Kohler generator?
> >
> > Scott Forman
> > 86 PT38
> > Memphis
> >
>

[Gregory OConnor]

Dick, we'll be there for sure. I better sign up to get a space in
the inner circle. I understand they line us up in model year????
puts authentic Cajin Gumbo 4 rigs to my right and a fine selection
of bottle wines just to the left.

Greg

--- In WanderlodgeForum@yahoogroups.com, "Joyce and Richard Hayden"
wrote:
>
> Greg,
> Remember Doug & Terri at last Q rally more or less in front of you
guys? He let the vibration go too long and had to get a new motor.
Took out the bearings. They have since sold the coach. Very nice
unit - light blue.
>
> See you at Q this Jan.
>
> Dick Hayden - '87 PT 38 - Lake Stevens, WA
>
> ----- Original Message -----
> From: Gregory OConnor
> To:
WanderlodgeForum@yahoogroups.com com>
> Sent: Sunday, October 05, 2008 8:40 AM
> Subject: [WanderlodgeForum] Re: Generator Vibration
>
>
> replacing mounts to 'new stock' as Fred writes may be all you
can do.
> softer mounts often isnt better. and non stock can prove issues
at the
> exhaust. I wonder if stock vibration was ever an issue or if
your
> vibration is a degenerative / failure result? Often vibration is
a
> sign of a broken mount or a engine idle/run cadence problem.
this is a
> good place to view the results of members repairs to that prob.
>
> The 94pt powertec has an electric fan. my fan makes more
vibration than
> the engine. as it starts up I can see that the blades are
unbalanced.
> the other area of probable vibration is the union to the
exhaust. some
> setups may have vibration at the coupling of the 'engine to
genhead' .
> the coupling in many has little variable of alignment and in
later
> years the engines were fitted with cone shape crank shafts. I
have seen
> the bolts between the genhead and the engine (LightTowers) snap
due to
> alignment issues at the genhead/engine union.
> Vibration is one of those energies where control of of must
consider
> newtons "for every action " law.
>
> Greg94Ca
> --- In WanderlodgeForum@yahoogroups.com 40yahoogroups.com>, "Fred Hulse" < fhulse@>
> wrote:
> >
> > Hi Scott
> > My suggestion is to look at the engine mounts and consider
replacing
> them.
> > I had an SP36 that vibrated badly and replacing the mounts
helped
> considerably.
> >
> > Fred & Jeanne Hulse
> > Morristown Arizona
> > 1997 Wanderlodge WLWB41
> >
>