Bendix cruise control creeps

[zboy59]

Hi All

I have an '86 PT40 with the Bendix cruise. Last season it didn't work and this
winter I gave it the once over (everything worked) but now I have a new problem
.... it creeps up in speed.

It will run fine for miles, and then all of a sudden we're from 65 to 80 ...
sometimes going UP hills.

Anyone else experienced this ?

Is there something I should do to "clear" the memorized speed other than using
the brakes ?

Marty Spaulding
'86 PT40
Kalamazoo

[Ralph L. Fullenwider]

Marty:

There is a re build kit for the cc5 cylinder, which sticks a little or acts
slow. Then you may have an o-ring leaking slightly on the set valves.

Is your throttle a little slow acting when you push the peddle?

It does not sound like the control unit. In your manual, you will find a
trouble shooting guide, but were it mine, I would suspect an o-ring leaking
past.

Safe travels,

Ralph and Charolette Fullenwider
"84FC35 "Ruff Diamond"
Duncan, Oklahoma

At 04:08 AM 5/26/2010 +0000, you wrote:
>Hi All
>
>I have an '86 PT40 with the Bendix cruise. Last season it didn't work and
>this winter I gave it the once over (everything worked) but now I have a
>new problem .... it creeps up in speed.
>
>It will run fine for miles, and then all of a sudden we're from 65 to 80
>... sometimes going UP hills.
>
>Anyone else experienced this ?
>
>Is there something I should do to "clear" the memorized speed other than
>using the brakes ?
>
>Marty Spaulding
>'86 PT40
>Kalamazoo
>
>
>

[sfedeli3]

Hi Marty- I second Ralph's suggestion about a dirty valve on the cruise assembly
or a sticky air throttle cylinder. Once on a trip across Iowa, mine started
behaving the same way- but it turned out to be a broken throttle return spring-
check those too. The combination of the sticky throttle cylinder and a broken
return spring will make for quite a thrill ride!

Shane Fedeli
85PT40
Hershey, PA

--- In WanderlodgeForum@yahoogroups.com, "zboy59" wrote:
>
> Hi All
>
> I have an '86 PT40 with the Bendix cruise. Last season it didn't work and this
winter I gave it the once over (everything worked) but now I have a new problem
.... it creeps up in speed.
>
> It will run fine for miles, and then all of a sudden we're from 65 to 80 ...
sometimes going UP hills.
>
> Anyone else experienced this ?
>
> Is there something I should do to "clear" the memorized speed other than using
the brakes ?
>
> Marty Spaulding
> '86 PT40
> Kalamazoo
>