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Tach problem
08-15-2005, 11:24
Post: #1
Tach problem
I noticed a few times when starting the engine, the tach would spike
over to the far right, over 4000 rpm, and stay there. After a few
minutes it would come back down to a reasonable reading. The last two
trips of about three hours each, it never came down. Just stayed
maxed out to the right until I turned the engine off. Then it came
back down to zero.

Any idea where I should start?

Thank you.

Steve Johnson
Grand Rapids, MI
'82 FC35
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08-15-2005, 14:55
Post: #2
Tach problem
Steve,

You have a tach sending unit on the front of your 3208, behind the
fan. It's 'L' shaped and the longer portion of it is about the size
of a roll of quarters going curbside to roadside. There are wires
coming off near the end of it. It's hard to get to and remove but you
may try getting some lubrication into it. I'd suggest a graphite
based speedometer cable lubricant.

On the drivers side of the sending unit will be a rubber cap (or the
remnants thereof) which covers where a cable would hook up to it.
Remove it and try soaking some lubrication into it.

Sounds like the internal magnets and drive tines are locking up, and
it needs cleaning/lubricating.

Good Luck,

Gary Miller
83 FC 33 - For Sale - 'millercoachworks.com'
Milwaukee area

--- In WanderlodgeForum@yahoogroups.com, "Steve Johnson"
wrote:
> I noticed a few times when starting the engine, the tach would spike
> over to the far right, over 4000 rpm, and stay there. After a few
> minutes it would come back down to a reasonable reading. The last
two
> trips of about three hours each, it never came down. Just stayed
> maxed out to the right until I turned the engine off. Then it came
> back down to zero.
>
> Any idea where I should start?
>
> Thank you.
>
> Steve Johnson
> Grand Rapids, MI
> '82 FC35
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08-17-2005, 00:44
Post: #3
Tach problem
Where is the sender on an 86PT40? I've had a similar problem to Steve's for a
while. I'd
like to free up the sender as well.

Secondly, suddenly the last time I got out with the bird my oil temperature
gauge went
south and read nothing. How would I troubleshoot that gauge, where is the
sender for it
etc.?

Lastly, there was a couple of posts on steering wheels recently. I had the
unenviable
experience of my wheel coming off in my hands a couple of years ago, this after
crossing
the great USA, and taking three maybe four trips around the east. Seems the nut
wasn't
torqued properly and it worked loose. I was EXTREMELY lucky that it decided to
come off
while I was stationary not while driving on the curves of US7 in Vermont. When
I put it on,
tightened the nut etc. I used locktite to seal the deal. I check the thing
periodically as
well, (just a little paranoid).

Bob Benner on beautiful LI, having just given my daughter away at a wedding held
here at
the farm for 300, (we cleaned up yesterday), looking forward to a get away to
Pennsy this
weekend. 86PT40

--- In WanderlodgeForum@yahoogroups.com, "Gary Miller" wrote:
> Steve,
>
> You have a tach sending unit on the front of your 3208, behind the
> fan. It's 'L' shaped and the longer portion of it is about the size
> of a roll of quarters going curbside to roadside. There are wires
>
> Good Luck,
>
> Gary Miller
> 83 FC 33 - For Sale - 'millercoachworks.com'
> Milwaukee area
, "Steve Johnson"
> wrote:
> > I noticed a few times when starting the engine, the tach would spike
> > over to the far right, over 4000 rpm, and stay there. After a few
> > minutes it would come back down to a reasonable reading. The last
> two
> > trips of about three hours each, it never came down. Just stayed
> > maxed out to the right until I turned the engine off. Then it came
> > back down to zero.
> >
> > Any idea where I should start?
> >
> > Thank you.
> >
> > Steve Johnson
> > Grand Rapids, MI
> > '82 FC35
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08-17-2005, 08:34
Post: #4
Tach problem
Bob and Jean:

Happy news from the teaching farm. Congratulations to everyone.

Safe travels,

Ralph and Charolette Fullenwider
Ralph's RV Solutions, Duncan, Oklahoma
http://home.swbell.net/rlf47/index.htm

At 12:44 PM 8/17/2005 +0000, you wrote:
>Where is the sender on an 86PT40? I've had a similar problem to Steve's
>for a while. I'd
>like to free up the sender as well.
>
>Secondly, suddenly the last time I got out with the bird my oil
>temperature gauge went
>south and read nothing. How would I troubleshoot that gauge, where is the
>sender for it
>etc.?
>
>Lastly, there was a couple of posts on steering wheels recently. I had
>the unenviable
>experience of my wheel coming off in my hands a couple of years ago, this
>after crossing
>the great USA, and taking three maybe four trips around the east. Seems
>the nut wasn't
>torqued properly and it worked loose. I was EXTREMELY lucky that it
>decided to come off
>while I was stationary not while driving on the curves of US7 in
>Vermont. When I put it on,
>tightened the nut etc. I used locktite to seal the deal. I check the
>thing periodically as
>well, (just a little paranoid).
>
>Bob Benner on beautiful LI, having just given my daughter away at a
>wedding held here at
>the farm for 300, (we cleaned up yesterday), looking forward to a get away
>to Pennsy this
>weekend. 86PT40
>
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