EX400-3 Pump angle sensor adjust

Does anyone have the procedure for adjusting the angle sensors on an EX400-3? Last time I did it I was still using my DR EX and I'm quite sure there was an application in that program for this. I now have DR ZX and it has nothing for doing this. If I remember right, since it has 2 sensors you can not adjust them with a volt meter like the smaller machines. It's been years since I worked on one of these. Thank you.

What's the Deere equivelant

Can you read pump displacement cc/rev with your Dr Zx?

mg2361 said:

Can you read pump displacement cc/rev with your Dr Zx?

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I will have to look, I think so.

mg2361 said:

Can you read pump displacement cc/rev with your Dr Zx?

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Do you know the specs and procedure for adjusting by reading pump displacement?

I do not have a spec handy for the EX400-3 (I'll look later this morning to see if I have it), but for a 992E it is 183 +/- 3 cc's. Procedure would have you use MPDr or similar tool (maybe the Dr Zx will work) and using the "special functions" section with the engine on in "I" mode to place pumps at maximum stroke. Then you would go to "monitor functions" and read the cc's/rev. If you do not have "special functions" you can try it by raising one track off the ground and run it in "rabbit" and read your cc's. Doing it that way might make the reading a little unstable but may get you close enough to make adjustments. The nice thing about the first method is you can make adjustments while the pump is loaded since no functions are activated. Using the track method I would recommend making the adjustments with the track back on the ground and the engine off and marking the location of the angle sensor then make small adjustments and then retest.

I did figure out how to set the A sensors. There is a place on the DR ZX for that, just have to know how to use my own tools, don't work on 400s very much. So I set them at 183, I also found a bad DP sensor which I replaced and am now getting the correct readings there but the machine is still slow and weak. I'm looking at the voltage going to the pump displacement solenoids, the books show testing the solenoids and also the wire harness to the PVC but I don't see the correct voltages listed anywhere. What is the correct voltage for each of the 4 modes and is it supposed to change as you operate the machine? Thanks again for the help.

Any codes? Are all functions slow? Pilot pressure good? Those solenoids are PWM so the with a meter you would read an average voltage. The average voltage would change as the pump increases/decreases displacement. Same result if you measured frequency. Sorry, I have no spec for that. Couple of quick and easy things to check. Check with your DrZx to see if the engine rpm's are correct. A faulty speed sensor sending an erroneous reading could fool the PVC into thinking there is too much load on the machine and destroking the pump. Also, does this machine have the counterweight removal system? if it does, check (with the DR) to see if the PVC is getting a signal from the counterweight removal pressure switch. If it is then that will cause the PVC to destroke pump 1.

mg2361, I sent you a PM. Thanks again.