Generator vibration

[Fred Hulse]

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

[Scott Forman]

Done that

Scott

--- In WanderlodgeForum@yahoogroups.com, "Fred Hulse"
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
>

[thomas_sorrentino]

Scott,

I don't have anything to compare it to, but from your saying, you
have way more vibration than I experience on mine.
If you come up to Shanes rally we could compare?

Tom Sorrentino
1987 PT38
Yanmar/Kohler Generator
Bedford Hills, NY

--- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
<scottforman75@...> wrote:
>
> Done that
>
> Scott
>
> --- In WanderlodgeForum@yahoogroups.com, "Fred Hulse"
> 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
> >
>

[Hisham Amaral]

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 haveto experiment with different mounts toget 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

[brad barton]

We had the same Yanmare in our Newell. Replaced the bushings, but still sounded rough especially when shutting down.

BradBarton00LXiDFW bbartonwx@...

---

To: WanderlodgeForum@yahoogroups.com
From: tomsorrentino@...
Date: Sun, 5 Oct 2008 02:54:28 +0000
Subject: [WanderlodgeForum] Re: Generator Vibration

Scott,

I don't have anything to compare it to, but from your saying, you
have way more vibration than I experience on mine.
If you come up to Shanes rally we could compare?

Tom Sorrentino
1987 PT38
Yanmar/Kohler Generator
Bedford Hills, NY

--- In "WanderlodgeForum@yahoogroups.com", "Scott Forman"
<scottforman75@<WBR>...> wrote:
>
> Done that
>
> Scott
>
> --- In "WanderlodgeForum@yahoogroups.com", "Fred Hulse"
> 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
> >
>

---

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[Gregory OConnor]

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, "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
>

[Joyce and Richard Hayden]

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: "Gregoryoc@aol.com"

To: "WanderlodgeForum@yahoogroups.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%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
>

[Scott Forman]

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
>

[Fred Hulse]

Scott,

Nice bit of work.

Congratulations!!

Fred & Jeanne Hulse
Morristown Arizona
1997 Wanderlodge WLWB41

[Hisham Amaral]

Scott Congratulations on your success. You maywant to looking into a better isolator than the rubber hose, try Granger's they have large inventor of isolators that may work. The next time you want to venture in doing more work. Best wishes, Hisham Amaral 97 WLWB Michigan --- On Sun, 10/5/08, Scott Forman <scottforman75@...> wrote: From: Scott Forman <scottforman75@...> Subject: [WanderlodgeForum] Re: Generator Vibration To: WanderlodgeForum@yahoogroups.com Date: Sunday, October 5, 2008, 4:06 PM 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%40yahoogroups.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 haveto experiment with different mounts toget 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%40yahoogroups.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 >