Ray70
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If you're saying the pin that fits into the slot in the fuel rack does not move freely ( swing left and right about 50 degrees ) then yes your pumps need attention. Before you go replacing them, get a gallon can of the "soaking type " carburator cleaner. Take the pumps out and soak them for a couple days, then pull them out and try working the levers and plungers. I've freed up dozens of them this way.
Many folks will probably disagree with me on this, but you can take all 4 out ( TM says to always leave 1 pump in place to hold rack in position ) and ensure the rack moves freely front to back. However you do need to be careful that the rack doesn't move too far forward and come out of position. I have personally removed all 4 pumps many times and never had a problem with the rack or getting the pumps back into position with the pins engaged in the rack's slots.
If you want to be safe, leave 1 pump in, fix and replace 1, then remove the other pump ( rack should now move freely with 1 good pump installed and shutoff solenoid out of the way )
Be sure to tighten the hold down clamp, otherwise the pump lever with touch the underside of the block giving the impression that the rack is still frozen.
When you remove the pumps, keep track of the plastic shims under the pumps and make sure you put the right shim pack back with each cylinder.
Many folks will probably disagree with me on this, but you can take all 4 out ( TM says to always leave 1 pump in place to hold rack in position ) and ensure the rack moves freely front to back. However you do need to be careful that the rack doesn't move too far forward and come out of position. I have personally removed all 4 pumps many times and never had a problem with the rack or getting the pumps back into position with the pins engaged in the rack's slots.
If you want to be safe, leave 1 pump in, fix and replace 1, then remove the other pump ( rack should now move freely with 1 good pump installed and shutoff solenoid out of the way )
Be sure to tighten the hold down clamp, otherwise the pump lever with touch the underside of the block giving the impression that the rack is still frozen.
When you remove the pumps, keep track of the plastic shims under the pumps and make sure you put the right shim pack back with each cylinder.