Jd 6400 tachometer

(quoted from post at 09:46:46 09/04/21) High and low idle stops are probably set different on injection pump between the two engine applications.

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(quoted from post at 09:46:46 09/04/21) High and low idle stops are probably set different on injection pump between the two engine applications.

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(quoted from post at 09:40:36 09/04/21) Had a reman jd 4045T engine go out in my 6400.
Bought a 4045T out of a street sweeper with 600hrs on it and put it in tractor.

When we installed the tach sensor in new motor it says at idle it is running 1200rpms and if you go full throttle it goes as far as the tach will go.
Obviously this is not right! Also for both motor serial numbers according to jd they take the same part number (sensor) for tach.

Any ideas?

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(quoted from post at 12:41:00 09/04/21)
Another possibility is post ID #s from both engines so the timing gears can be cross-referenced.

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(quoted from post at 09:31:53 09/05/21)

It's odd but both SE & PE prefixes come up with no info.

4045 has 1104 possibilities.

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