John Deere 5520 hour meter

[maddenfarms]

I just serviced my JD 5520, looked to put the hours down and discovered that my hour meter no longer is working. I checked for loose wires and all fuses are good. Has anyone else had this problem? :anyone:

 

[Tx Jim]

:welcome:
Possible faulty tachometer sender on LH frt of engine or loose wire.

 

[maddenfarms]

Thanks Jim, I'll check the wire. Is there a way to test the unit before I buy a new one?

 

[Tx Jim]

They can be tested with a VOM but I don't know the correct ohm's.

 

[maddenfarms]

Thanks again Jim, I'll do some more digging.

 

[Kyle_in_Tex]

I hope this might work, the meter on the 5420 has been out for over a year or 2.

Thanks!

 

[JD5210]

The attached picture and following write-up is from the 5X10 tech manual. I think this should close if not the same for the 5X20. I do not believe the speed sensor is the problem. I suggest looking at the alternator/regulator or the wiring from it to the cluster.

Current flows from battery (A), across closed contacts or key switch (D) and out circuit 022. Flow continues through 10-amp fuse (E) to circuit 072 and to alternator/regulator (G) hourmeter positive side. Negative side of hourmeter (F) connects to ground through circuit 010. Hourmeter runs whenever engine is running.

Should one want to check the speed sensor note it is AC and not DC.

 

[maddenfarms]

Thank you for the diagram, I'll take it to the shop and see if I can figure it out.