Let's look at some images and hopefully that will make it easier. This is a YF4145s which is different but is becoming my good and interesting friend. In a few weeks, I have an idea it will become some member's new good friend also, but more on that later.
First image shows the link you'll bend to adjust the pump lifter. Yours may look different, but this is what I have in front of me now and fairly common. Bending this will cause the lifter to move up...or down. It won't change the angle of anything.
Second image shows how the metering rod arm and the lifter sit when nothing is happening. Pretty well parallel, but not spot-on exact.
Third image shows me pushing the metering rod down to give you an idea of how much movement exists here. Please pay no attention to the spring-loaded gizmo there. That is an idle vent mechanism which isn't in earlier models.
Fourth image shows me holding the diaphragm rod down as far as it will go. At this point the two are both parallel and just touching (meaning I might slide a sheet of paper in there if I wanted to) and if you check the metering rod, it will also just be touching the bottom of its travel. And that's ideal for everything. IMPORTANT NOTE: always adjust AFTER the throttle body to float bowl gasket has been installed and the throttle body and float bowl have the 2 screws installed.
Fifth image shows where the metering rod arm can carefully be bent to adjust the metering rod if needed. I use a pair of needle-nosed pliers and work very carefully.
Hope this helps.
If you happen to have one of the newer ones, here word for word are Carter's instructions from their form 16C-13-861 (A.C.C.1986):
Fig. 3 Accelerator Pump Adjustment (GM and Checker Only) and Metering Rod Adjustment (AMC/Jeep up to 1972; All others up to 1969) 1. Hold throttle valve closed. Press down on top of accelerator pump shaft until it bottoms 2. Metering rod arm should now contact pump lift link at outer end near spring 3. To adjust, bend accelerator pump connector link at lowest angle (and by this they mean the link shown in image 1 below).
And in this same Carter publication,
D. Metering Rod AMC-Jeep up to 1972 All others up to 1969 1. Hold throttle valve closed. Press down on top of accelerator pump shaft until it bottoms 2. Metering rod should seat at same time metering rod contact pump lift link between springs and at support lug. Note: On early models that do not have a support lug on lift link, metering rod arm should contact and be parallel with pump lift link when metering rod is seated. 3. If metering rod is not seated or seats before arm contacts lift link, adjust by bending arm up or down.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
