Have the injection pump apart.....what does this lever do?

[Spokerider]

 I have taken the 1993 AAZ injection pump apart to reseal it. It is an LDA model, and has that spring-loaded lever pictured above, on the LDA cover. On the inside of the cover, it has a hook-shaped arm that is part of the rod that goes through the LDA housing, as in the bottom pic.

What does this lever do? There was nothing attached to the lever on the outside of the pump, no cable, actuating rod, etc. That black hook on the inside just rocks back and forth a bit under the spring tension.
The reason I ask is.........I took it apart to change the O ring, and didn't realize that the rod shaft was splined to the lever, and thus did not scribe a mark on the rod and lever. I have the black hook positioned reasonably close to where it was before I took it apart, but it's prolly not in the exact correct location on the spline.

Does this lever / hook have any interaction with the governor linkage assembly?

Had I known it was splined, I would have been more careful marking exact locations of the parts, but I have not seen this part in any pump rebuild tutorials.

Thanks.

[vanbcguy]

I suspect that's a manual fuel shutoff lever. Libbydiesel would be your best bet to find out how it is supposed to work.

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[Spokerider]

The lever in question is shown just under the number "67" in this exploded view..........but the diagram doesn't say what it is.
http://pics.tdiclub.com/data/500/AAZ_Injection_Pump_Manual_Transmission.pdf

[410]

That lever limits max travel of the governor lever assembly.  If you move that lever with the engine running it will shut the engine off.  I cut the inner part of that lever off and leave the rest to keep the hole plugged.  The o ring gets changed on the shaft while I have it out to cut the end off. 

[Spokerider]

So it's a manual pump shut-off lever. Thanks for the explanation, it helps.
Is it a lever unique to the 1.9 pumps? Because I don't see it on some other 1.6 pumps.

I'm ok with it working as designed, since I'm not modding the pump internals.

[vanbcguy]

It is not a common lever to see - I've only ever heard of it coming on automatic equipped cars which are an extremely rare combination with IDI engines. Nothing saying that the odd one didn't end up on a manual though.

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[Spokerider]

I found another thread with pics of it, and the guy calls it a " max throttle limiter plate".
By comparing the lever position in his pic to my best guess at assembling mine, they look to be in the same position. I called it good and went with it.

That lever sure does get in the way of putting the LDA cover back on, I gotta say.....  The govenor assembly has to go above the lever, and at the same time you have to push the gov link shaft up through the cover bushing, and keep the gov link assembly from coming out of the slot. Took many attempts before it all came together.

The last difficult part of this pump assembly, was getting the 3 tiered springs back on..........grrrrr. The only reason I got it all back together was because I had a spare pump to look at, side by side.
The last spring on the top was the worst. Getting it to hook onto the plate that last little bit was very tough. I finally uses a piece of strong 1/8 cord, looped it, and placed the loop over the spring hook and pulled. Using that method, I was able to get the spring wound tight enough to get the hook onto the plate tab. Even vise grips were a no-go.  Hopefully someone else can use this trick, it worked for me.

What I did notice when installing the springs was that there was an alignment mark stamped into the lever arm that has the splined hole to it. The stamped mark was in a recessed hole, and gets covered by a 3/4" washer.......if that helps you visualize where it is. Anyway, these alignment marks were vey close to being in alignment with the one I had scratched on the same lever. When I scratched mine, I could not see the stamped ones at the time, as they were covered with said washer. So these alignment marks I scratched in, lined up with the factory line on the tip of the splined gov link shaft. with the idea being to get the lever / shaft orientation correct upon reassembly, as you know.

The factory alignment marks were just a bit more in the direction of " throttle on" or CCW, as viewed from the top of the pump, maybe 15 degrees more CCW than the marks I had scratched. I went with the factory marks.........I mean, why else would they be on there right? but for shaft / lever alignment. I was thinking someone else had been into the pump before me, and that they got the alignment out by 15 deg. So I gambled. If I have it wrong, I will have to fack with the springs all over again.

IF it is wrong, how will I know??
 I have never heard this engine run, as I bought it as a rebuilt long block form, but I know for sure the pump / engine are a matched pair.

Thanks.

[ORCoaster]

You will experience the dreaded "I have no power from my engine" syndrome if the pump is not working due to the accel lever alignment

[410]

Or it will rev up on start up as if it's running away.

[ORCoaster]

Either way you want to be in the middle of those two ends of the spectrum.  Hope the alignment gets you there.

You just don't want to have to mess with it anymore and I completely understand that.  Better things to do I am sure.

[Spokerider]

Alright, thanks for the answers.
 Since I have the lever on the spline in the " more throttle" direction from my scratched-in alignment marks, I'm guessing that the engine is likely to rev up abnormally, if the spline / lever alignment is out.

Yes, I have better things to do than mess with the pump springs again......like finish assembling the rebuilt engine, and get started on a lot of rust repair / body work on the Samurai, install suspension lift kit.