Please excuse the repitition. I have added this information to this string so the data can be kept together. This is additional injection pump information dealing with rear adjustments and internals.
Do not engage the scew with the engine running!
"Engaging the screw when the engine is running will wind it all the way in. The screw or the adjuster can be damaged.
The screw is standard right hand thread. Turn it counterclockwise to move it out (leaner mixture) or clockwise, moving it inward (richening the mixture).
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[View the screw removed. Notice that the six sided slotted screw is wedged between small leaf springs. The tension from these springs gives the screw the "click" feeling. As the screw is adjusted outward it may eventually move off the springs. At that point the "click " feeling is lost and The screw is free to move on it's own!
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I am sure the factory sets up the pump with the screw set down deep enough in the leaf springs so that there is enough room to adjust up or down. Start somewhere in that range. The mixture of the engine will determine how much to adjust the screw after re-assembly as long as the adjustments do not take you past the limits.
Download Attachment: governor adjuster mechanism.JPG59.62 KB
Download Attachment: governor adjuster mech. 2.JPG58.21 KB
A snap ring holds the entire adjustment assembly in place. The three coil springs are acted upon by the adjustment screws. Each coil spring effects a different range of the centirfical governor.
The oil level on these "early" injection pumps should be checked periodically. It's oil supply is isolated from the engine oil. Oil should be added or drained accordingly. The level should be read after the dip stick is screwed all the way in. Later injection pumps had engine oil circulating through them and did not have to be checked.
Joe Alexander
Blacklick, Ohio