Re: Proud New Owner of a 49 Packard Club Sedan
Posted by HH56 On 2018/10/13 10:19:51
Assuming you are also working on a 22-23 series here is a general illustration of that linkage showing the location of the kickdown switch. All years have a similar location for the switch but linkages vary considerably depending on year and accessories so the adjustment points may be very different.
The kickdown switch is mounted in the accelerator linkage transition bracket at the bottom edge of the firewall. Depending on which switch you have, some have double mounting nuts and a long thread where you can raise or lower the switch to assist in the plunger movement. Other switches are fixed in height and linkage is the only part that can be adjusted.
First step is make sure carpet is not bunched or anything caught under the pedal so it cannot make a full travel. If that part is OK check the shape of the pedal. On some pedals, if the foot pressure has always been applied more in the middle than the top the pedal can get bowed. In those cases the middle hits the carpet before the top can move the linkage all the way.
If the pedal is OK then it gets into the linkage. On some models there is only one adjustment point which can be in a rod on either side of the engine and separate length rods for different carbs are used. Many times the rods for whatever reason have been swapped with one from another engine and is of the wrong length which makes proper adjustment nearly impossible. On other models there are two adjustment points which over the years one might have been used more than the other so one is way out of adjustment with respect to the other.
When getting them back in relationship the first point is adjusted so the pedal can move full range and hit the switch to fully depress the plunger. Once that is done the second point is adjusted so the throttle plate is closed or open at full throttle depending on the respective positions of the pedal. It sometimes takes a bit of work between the two and of course still can depend on the proper length rod being installed.
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The kickdown switch is mounted in the accelerator linkage transition bracket at the bottom edge of the firewall. Depending on which switch you have, some have double mounting nuts and a long thread where you can raise or lower the switch to assist in the plunger movement. Other switches are fixed in height and linkage is the only part that can be adjusted.
First step is make sure carpet is not bunched or anything caught under the pedal so it cannot make a full travel. If that part is OK check the shape of the pedal. On some pedals, if the foot pressure has always been applied more in the middle than the top the pedal can get bowed. In those cases the middle hits the carpet before the top can move the linkage all the way.
If the pedal is OK then it gets into the linkage. On some models there is only one adjustment point which can be in a rod on either side of the engine and separate length rods for different carbs are used. Many times the rods for whatever reason have been swapped with one from another engine and is of the wrong length which makes proper adjustment nearly impossible. On other models there are two adjustment points which over the years one might have been used more than the other so one is way out of adjustment with respect to the other.
When getting them back in relationship the first point is adjusted so the pedal can move full range and hit the switch to fully depress the plunger. Once that is done the second point is adjusted so the throttle plate is closed or open at full throttle depending on the respective positions of the pedal. It sometimes takes a bit of work between the two and of course still can depend on the proper length rod being installed.
Attach file:
(83.38 KB)
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