Agriculture and Farm Equipment

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Have a Deere 870 with starting problem. have replaced

Customer Question
Have a John Deere 870...
Have a John Deere 870 with starting problem. have replaced starter and battery - same problem. Starts fine with charger on it. Without it the starter solenoid just keeps clicking. Measures 10v plus at starter when turning ignition key. Measures 13v at starter terminal. All dash lights come on when switch is operated.
Submitted: 10 months ago.Category: Agriculture and Farm Equipment
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Answered in 25 minutes by:
9/28/2017
Mechanic: Dan, Technician replied 10 months ago
Dan
Dan, Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 6,885
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment, trucks and farm equipment - 1995 WyoTech graduate.
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Hi my name is***** will be glad to help. Test the voltage at the small S terminal signal wire on the starter solenoid when trying to crank. There should be 12 volts there. Deere had a problem with some of these tractors and began installing an upgraded relay kit when needed. Check the voltage there with a volt meter and also check your safety switches and wiring harness/connector pins for problems. Let me know the results. We can follow up as needed.

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Mechanic: Dan, Technician replied 10 months ago

Also be sure to inspect, clean and tighten all connections including all grounds.

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Customer reply replied 10 months ago
11+ volts on solenoid. Just chatters when try to start. 12V applied directly to solenoid results in same chatter. If I put battery charger on battery as boost - then will start. Previously cleaned all connectors. New battery and new starter.
Customer reply replied 10 months ago
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Category: Agriculture and Farm Equipment
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