Troubleshooting Bendix Fast Idle/Cruise Control on 89 35FC 3208 ATAAC

[Rick B]

I just wanted to jump in and let folks know that Mike Hohnstein in
Germantown, WI has worked on the Bendix throttle / cruise setup on my
1987 FC 35. I was unable to find a replacement Bendix cable anywhere,
or even get one made, but Mike was able to get the job done. He has
also tuned up the throttle to get me full throttle opening. Anyone
(especially 87-89 FC) experiencing problems with the Bendix, cables,
throttle, setup - I can highly recommend Mike. I would also trust him
with anything else on my engine / drive train, chassis AC (works great
now!), and about anything else he was willing to tackle.

Anyone with an 87-89 FC should keep Mike's number handy in case they
have problems with their Bendix throttle/cruise setup.

- Rick
87FC35
Rochester, MN

--- In WanderlodgeForum@yahoogroups.com, "Richard Gideon"
wrote:
>
> My multimeter testing indicated the potentiometer to be faulty or at
> least out of tolernce. I tested with the 'pot' still on the coach
> and now am traveling in South Texas and will replace pot in April
> after this trip. Parts man named Spark at Seattle Clutch & Brake
> fixed me up with a new Bendix pot and spring assembly P/N 101951N.
>
> The CC works poorly but is still useful to allow me to keep my coach
> speed above the set speed (cruise control helps pull the injector
> pump to 'WOT' wide open throttle.
>
> The high idle still behaves same as when I first bought the FC back
> in Sept 2006, i.e. goes to 3000 rpm immediately when pressing the
> resume switch on the CC panel.
>
> Dick Gideon
> 1989 35 FC
> On the road, Canyon Lake, Texas
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Richard Hayden"
> wrote:
> >
> > Still is not working even with the new CC-5. I'll look into it
> later after we've settled at the winter quarters. Leaving tomorrow
> morning.
> >
> > Dick Hayden - '87 PT 38 - Lake Stevens, WA
> >
> > ----- Original Message -----
> > From: Curt Sprenger
> > To:
> WanderlodgeForum@yahoogroups.com > om>
> > Sent: Monday, October 15, 2007 3:20 PM
> > Subject: Re: [WanderlodgeForum] Re: Troubleshooting Bendix Fast
> Idle/Cruise Control on 89 35FC 3208 ATAAC
> >
> >
> > Dick,
> >
> > FYI in case you need a CC-5 unit. The CC-5 unit is no longer
> manufactured. A
> > couple of us just purchased CC-5 potentiometer units through
> Brake & Clutch
> > Supply, Seattle, Washington. Talk to Spark. I bought one for
> possible
> > future need. Dick Hayden bought one because his CC was not
> working.
> >
> > On 10/15/07, Richard Gideon >
> wrote:
> > >
> > > Thanks for the reply Ralph: Early this morning I got into
> my "blue
> > > box" and retrieved the booklet describing the operation and
> > > troubleshooting the Bendix Cruise Control System (SD-10-1)and
> on page
> > > 15 of the booklet I found the symptoms, cause & remedy for what
> > > appears to be ailing the CC on my FC.
> > >
> > > V. Cruise Control System oscillates above and below the speed
> > > setting. Will not hold a specific speed setting within plus or
> minus
> > > 1 mph on level highway.
> > >
> > > Cause, CC-5 potentiometer or its wiring is defective.
> > >
> > > Remedy. Visually inspect for broken or obviously damaged wiring
> to
> > > the CC-5 potentiometer (Figure 13). Disconnect wiring connector
> 3 in
> > > Figure 13 and check the resistance between the sockets shown:
> > >
> > > 1 and 3 3600-4400 ohms
> > > 2 and 3 1080-1320 ohms
> > > 1 and 2 4320-5280 ohms
> > >
> > > If these readings are not obtained, replace the CC-5
> potentiometer.
> > >
> > > I'll post later this week, with the results of my testing.
> Thanks
> > > for the guidance...I"ll dig out my digital volt/ohmeter.
> > >
> > > Dick Gideon
> > > Freedom Bird
> > > 1989 35FCSB
> > > Rolla, MO
> > >
> > > --- In
> WanderlodgeForum@yahoogroups.com > om>,
> > > "Ralph L. Fullenwider"
> > > wrote:
> > > >
> > > > PT cruise/air throttle/high idle
> > > >
> > > > Some time back, I posted to the files section, a couple of
> files
> > > on how
> > > > these systems work and inter act.
> > > >
> > > > As for the FC's it is a little difference because the factory
> <BB>
> > > dip
> > > > switch settings allowed the fc cruise controls to work
> slightly
> > > different
> > > > than the PT's.
> > > >
> > > > As for the problem in the FC, where it is on or off and no in
> > > between, I
> > > > would suspect the CC5 potentiometer internal of the cylinder
> to be
> > > faulty.
> > > > All this can be checked with a decent Multimeter and
> following the
> > > checks
> > > > in the Bendix manual that should be in the blue box.
> > > >
> > > > The only thing I have found that was done a little funky form
> the
> > > factory,
> > > > is how the clutch switch was wired up since there are no
> clutches
> > > in the
> > > > Birds and that was done with 2 solenoids in the system. I have
> > > actually
> > > > taken those out of the system to get my cruise working
> properly and
> > > that
> > > > was done with a pair of side cutters! One snip and you
> have
> > > cruise.
> > > > Now the problem with the break pedal not canceling the cruise
> is or
> > > has
> > > > generally been a bad set switch or corroded contacts in a
> > > connector. And
> > > > can usually be cleared up by cleaning the pin contacts coming
> from
> > > the
> > > > Bendix control.
> > > >
> > > > Remember that our Coaches put out 120 to 130 psi of air and
> there
> > > is a
> > > > regulator with the bendix set up to drop that pressure to 80
> to 90
> > > psi,
> > > > thereby making the working difference of only a few psi
> > > differential that
> > > > the electronics of the bendix system reads and enacts on.
> > > >
> > > > >
> > > >
> > > > Safe travels,
> > > >
> > > > Ralph and Charolette Fullenwider
> > > > 84FC35
> > > > Duncan, Oklahoma
> > > >
> > >
> > >
> > >
> >
> > --
> > Curt Sprenger
> > 1987 PT38 8V92 "MacAttack Racing"
> > Anaheim Hills, CA
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>