one last trial- 450 governor

One last chore before I get my FIL"s 450 back to him...

The throttle has no response until it"s moved fully a third on its 90-degree arc. The only adjustable piece is in the second link of the four pieces that deliver throttle motion to the "speed-change lever" of the governor. Lengthening this piece by its unthreading moves the governor-speed-lever closer to engaging (with the throttle kept all the way on "idle"), which has resulted in some improvement, but I"m at the practical limit of its "unthreading" with some ways to go to get more immediate response from the throttle.

I see nothing within the governor that is adjustable, though my I&T manual suggests checking "synchronizing the governor-to-carburetor" linkage within the connecting rod housing.

All the link-ends are rods with the ends bent 90 degrees going through holes in the links, and held in place by cotter pins, which may lead to a bit of slop also, and maybe some delay-in-throttle-response is pretty normal. I can live with that. but I"d like to know if I"m missing something, because I"d worry that a delay in response means I"m not getting close to the top-RPM capability of the engine.

Any thoughts?

Second, I was going to check his valve adjustment before calling it a "wrap". I have an IH sheet that shows a "simplified valve adjusting procedure" in which all 8 valves can be adjusted with only two movements of the crank, at #1 TDC and at #4 TDC. Help me with a reality check- is not #4 TDC exactly 1 and 1/2 revolutions of the crank?

Thanks!

Just saw this same problem the other day on this same forum. The weights and weight carrier wear out. To check it, the weights should pivot smoothly but not jiggle or wobble on the carrier.

The reality is that is it is operating at full rated High Idle (wide open and not loaded), it is as good as it gets. They are generally that way from the factory. Seriously there is nothing wrong with it as is if it reaches max governed speed with it on the last notch. Jim

you can try to bush all the pivot points, but you will find it doesn't make very much difference. Take a laser tach and measure idle & high rpm, adjust to within specs. Then adjust the linkage.

you can try to bush all the pivot points, but you will find it doesn't make very much difference. Take a laser tach and measure idle & high rpm, adjust to within specs. Then adjust the linkage.

Thanks, Steve and Jim. I can easily live with that. There is a slight looseness of the weights, nothing dramatic, but with the looseness in the linkages, I suppose it all adds up. Nothing I'll tackle before Spring, if at all, for all we use it for. I went back through archives, and found a whole lot of info, and the stories are all similar. She's humming better than I ever remember since I married into this family. I got a lot done on this, I'm pleased with it, and he will be too. Valves, timing, and tin tomorrow, and I'll be done, and can let him get back in the saddle.

I read in R P M a few years back of a 450 diesel with the same problem.Seems where the throttle handle is pinned to the round shaft,the pin/hole had become wallowed ,thus causeing slop.The problem/wear was not too visable,gauseing difficulty in finding the problem.