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

[pattypape]

Dick,

Thanks, I appreciate the update on your progress.
I have an intermittent high idle issue, Sometimes it works fine,
Other times the 3208 revs up and I quickly hit the off button.
Our cruise works great, So I am interested in your final outcome.

Thanks Again,

Bill 88 FC Michigan

--- 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]
> >
>