Re: 21st series R9 overdrive kick down switch

Posted by HH56 On 2015/11/15 21:06:55

By disengage I take it you mean the acc needs a bit more travel to fully depress the plunger? If so, the only linkage adjustment is either at the clevis at the carb side or the spring loaded adjusting turnbuckle type mechanism on the rod between the firewall bracket and the engine or EC bracket. Exactly what adjustment is available differs by engine. Adjusting those and particularly the clevis at carb side you have to make sure the carb rod moves far enough to engage the starter switch yet is not so short as to prevent the throttle from closing. Clevis side is affected by the turn buckle adjustment so is kind of a trade off of adjusting one and checking or compensating the other.

If you have the EC there are some other adjustments but those require some finesse and need to be done in an order and amount detailed in the service or training manual. Also if you have EC make sure the rod and lever for the accelerator switch is pointing toward the front, not toward the firewall.

Is there a chance the kickdown switch can be moved? If the R9 switch maybe not but some replacements have a longer stem and a nut on both sides of the bracket. By adjusting the nuts the switch can be raised up or down slightly. Also, is there a chance the carpet or something under it is preventing the accelerator from going down any farther. There should be a phenolic plate around the accelerator stem which is sort of a dust and air seal. Some of those have wound up on the wrong side of padding or carpet and block the accelerator from going down farther.