Instrument Cluster for JD 2240

cizmas · Jan 29, 2015

I bought a new instrument cluster for my JD 2240. On the old one I could no longer see the temperature and fuel level since the glass (or plastic) was no longer transparent.

I installed the new instrument cluster but the hour meter and the the speed-rpm do not work.

Is there a way to test the new instrument cluster without connecting it to the two connectors of the tractor?

Thank you!

Ed NM · Jan 30, 2015

Did the old one work? Maybe a bad cable. My 2440 is cable driven.

cizmas · Jan 30, 2015

Yes, the old one worked. It is not driven by a cable - it has a sensor that sends an electrical signal to the instrument cluster.

Ed NM · Jan 31, 2015

My guess is sensor is bad.

Robert Major · Jan 31, 2015

Hi
Maybe thats similar to a 2950 we had at the seed plant. it had a card type fuse in the dashboard. with I think 4 usable sides on. if one of the fuses blows on there I think all the dash works except the hour clock and rev counter, you just turn the card and fit it in another spot when you find and fix the problem right, then replace if all 4 sides are used up eventually.

That tractor would blow the fuse if it hit a hard bump.
maybe you have a shorted a wire or have a bad connection somewhere up by the bulk head, thats moved when you pulled on the loom.
Someone told me thats where our problem might of been.
Everything else except the motor fell apart at 10.000 hrs before I fixed that problem right, it ran with no clock for a while and we dumped it off on a 6410, that was equally worn out in 4 years and down the road L.O.L!.
Regards Robert

Tx Jim · Jan 31, 2015

Robert Major
IIRC 2240 didn't have printed board(card) that later models had.

Robert Major · Jan 31, 2015

Thanks, Like i said I didn't know for sure, and
there's loads of different things around in JD's
over the years, so no problem. but could the wire
problem be the same as he doesn't have a proper
cable drive? or is there a different type fuse in
them someplace, so the cause could in theory be
the same?
Regards Robert

buickanddeere · Jan 31, 2015

http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt

At serial number 350,000 when all 40 series production was shifted to Mannheim. The tach went from cable drive to electronic.
iirc when I changed the Bosch Alternator on my 1640 there was a small wiring harness from the alternator back to the tach.
Grounding problems will blotch the operation of a dash. As previously asked , is the dash being fully powered up ?

Tx Jim · Jan 31, 2015

cizmas
Check to be sure you have a good connection on the sensor(parts key 29) on LH frt of engine and the wires to the dash

cizmas · Jan 31, 2015

Thank you for your suggestions!

My 2240 is made in France, in 1982. It has a serial number larger than 350,000 indeed.

The instrument cluster seems to be working, except for the hour meter and the speed.

I could replace it with the old instrument cluster to test if the magnetic sender is still working. More elegant would be to try
to measure whether there is some voltage coming from the magnetic sender, but I am not sure what voltage to expect.

Any suggestions on measuring the voltage that should go to the instrument cluster? I know that the wire is 8 in the
attached wiring diagram, and I know it should be on position 4 of connector 21 (the right side).

Thank you,
Paul

cizmas · Jan 31, 2015

Jim:

I will take a look but I am afraid it is difficult to get to the magnetic sender. I checked it when I replaced
the water pump, so iirc it is well hidden in the belly of the tractor.

I would like, instead, to measure a voltage that should go from the magnetic sender to the tachometer.
Do you know what voltage to expect?

Thank you,

Paul Tx

cizmas · Jan 31, 2015

Robert:

Thank you for your comments!

I attached two pictures of the cluster from the Technical Manual - maybe they look familiar.

Where should be the fuses?

Thank you,
Paul

cizmas · Jan 31, 2015

Here is the diagram.

cizmas · Jan 31, 2015

This is possible, although it worked before I changed the cluster. How can I test whether is bad or not (by measuring some voltage)?

Thank you,
Paul

buickanddeere · Jan 31, 2015

(quoted from post at 23:37:50 01/31/15) Thank you for your suggestions!

My 2240 is made in France, in 1982. It has a serial number larger than 350,000 indeed.

The instrument cluster seems to be working, except for the hour meter and the speed.

I could replace it with the old instrument cluster to test if the magnetic sender is still working. More elegant would be to try
to measure whether there is some voltage coming from the magnetic sender, but I am not sure what voltage to expect.

Any suggestions on measuring the voltage that should go to the instrument cluster? I know that the wire is 8 in the
attached wiring diagram, and I know it should be on position 4 of connector 21 (the right side).

Thank you,
Paul

The engine was built in Saran France and the tractor assembled in Mannheim Germany.
The dash will put probably a 5 volt DC signal out to the tach's sensor coil. Every time an engine driven pole/notch rotates past the sensor's coil. An AC signal will be induced and sent back to the tach.
Possibly some well hidden wire or connector has become kinked or broken

cizmas · Feb 1, 2015

Thank you. I will reply with what I found once finish
working on it.

Instrument Cluster for JD 2240

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