Old version Jd 770 won't start.

[transformed]

I was gifted a 770, that was extremely well abused. But it started and drove. I replaced the fuel filter, fuel lines, battery, and installed a trickle charge port on the battery.
It has always started for me until the other day.
I used a VM, battery is at 14.4 volt, starter fuse link is ok. Voltage to the starter is also 14.4 volts. I turn the key and the Voltage disappears.
Before I would hear the fuel cut off scilinoid function. But now I don't.
Should I check the fuel cut off relay first or the scilinoid?
Thank you
P.s. my comment about the "Old version" is referring to the vin number ending number.
#M0070A001847.
What year of tractor is mine?

 

[grsthegreat]

Check the battery cabLes to make sure there clean and tight. Also, are you sure you dont have anything like the pto left on?
This unit, if it was like my old 870, had to have the gears in neutral, the clutch depressed, a person seated in drive seat and pto off or you heard nothing while trying to start.

In winter sometimes the seat switch would freeze up not allowing me to start tractor

 

[etpm]

Battery cables. The clue is that the voltage goes away.

 

[transformed]

Question, the fuel cut off scilinoid has some discoloration on the plug itself. Maybe some heat discoloration? Should I replace it? Also where is the best place to buy parts for the 770?

 

[beenthere]

Check with your Deere dealer, or search for JD shut-off solenoid

From JD parts
Don't see a split for serial number you mentioned.

 

[bigtiller]

JD 770 info...

TractorData.com John Deere 770 tractor information

www.tractordata.com

 

[beenthere]

P.s. my comment about the "Old version" is referring to the vin number ending number.
#M0070A001847.
What year of tractor is mine?

Appears to be a 1989 year

 

[arto98607]

I was gifted a 770, that was extremely well abused. But it started and drove. I replaced the fuel filter, fuel lines, battery, and installed a trickle charge port on the battery.
It has always started for me until the other day.
I used a VM, battery is at 14.4 volt, starter fuse link is ok. Voltage to the starter is also 14.4 volts. I turn the key and the Voltage disappears.
Before I would hear the fuel cut off scilinoid function. But now I don't.
Should I check the fuel cut off relay first or the scilinoid?
Thank you
P.s. my comment about the "Old version" is referring to the vin number ending number.
#M0070A001847.
What year of tractor is mine?

Sounds like poor battery cable connection(s)...

Fully charged battery should have 12.6 volts.

How did you get 14.4 volt - was it still connected to a charger?

 

[joecdeere]

+1 on battery cables, REMOVE and clean both ends of both cables!

Recheck that serial number, kinda looks like you have a 70A loader serial number, not the tractor one. Tractor serial number is right above PTO on rear should be the below format-

 

[bowenskye]

Have you tried swapping batteries?
How about load testing the battery? I have had many occasions that a battery will register good voltage, while not being able to perform under load.

 

[S854]

+1 on battery cables, REMOVE and clean both ends of both cables!

It goes without saying for those of us who’ve done it… but…

Also clean the attachment points of those cables… battery posts, solenoid (!), and pay particular attention to the frame grounding connection… when I have a no-start condition, this is where I begin… at the frame ground…

 

[CoyPatton]

In my experience you have one of a few things going on, preventing starting.
1) one s safety switch preventing power going to the starter—the safest way to check this with an immediate answer is to use a remote start switch, one can be made simply if you don’t have one and have the parts (however most auto parts stores carry them, and most of us don’t have the needed switch on hand.
Another potential issue is with battery cables and corrosion, usually at connection points (battery, starter, or frame) although on older equipment where cables have not been replaced, I have seen this inside the insulation. An ohm test usually reveals this.
The other that comes to mind is s battery that carries a surface charge but has no real charge—load test the battery independent of the tractor.

If I’m going to a store to buy a remote start switch, take the battery to be tested as you go.

 

[Jaygyver]

By all means definitely check the battery cables at BOTH ends just to be sure.

Also make sure the trickle charger didn't boil out the battery acid if it was a flooded cell type, some trickle charger won't turn off even tho they say they will.

Dirty battery cables will, in general, still give you voltage but not amperage. When you said you turned the key on, did you mean on and did NOT start it?

If so then unless the cables are REALLY corroded then you should still get lights and the solinoid should still click. If you went to start it and it didn't even click the starter relay then could be the cables.

I just replaced the whole sheet metal area around the battery on my '97 770 a summer or two ago as it was corroded from the battery acid bad. If I remember right I did lose the starting ability but had voltage to the gauges etc. The frame ground was probably the problem on mine.
I think the early 770's had their batteries in another area but on my later one the battery cable went to the battery tray and there was also another ground from the tray to the frame. I can't remember but I THINK it did. My battery is in front of the radiator.

After checking the battery cables you should have dash lights with the key in the ON but not start position, if you do and the solinoid doesn't click then you can always check for power at the solenoid.

 

[transformed]

Thank you everyone for your response.
I bought new battery cables, I first installed the positive side. I accidentally touched the steering pitman arm? That's next to the starter bolt, and I was expecting a shower of sparks. But there wasn't any.
So I started to replace the negative side, the bolt that mounts the cable end to the frame was loose.
I cleaned the mount location and attached the new cable.
Turn the key and the solenoid for the fuel cut off worked. But it still wouldn't start.

So this time I tried to deliberately short out the starter. I received a shower of sparks but the starter failed to spin. So I grabbed a hammer and knocked on the starter a little bit. Turned the key and it started.

So it could have been A LOT of different areas. But having an abused tractor and trying to care for it and give it a better life, things wear out.

Key switch replaced
Both battery cable

Thank you again for help.

 

[bigtiller]

Thank you everyone for your response.
I bought new battery cables, I first installed the positive side. I accidentally touched the steering pitman arm? That's next to the starter bolt, and I was expecting a shower of sparks. But there wasn't any.
So I started to replace the negative side, the bolt that mounts the cable end to the frame was loose.
I cleaned the mount location and attached the new cable.
Turn the key and the solenoid for the fuel cut off worked. But it still wouldn't start.

So this time I tried to deliberately short out the starter. I received a shower of sparks but the starter failed to spin. So I grabbed a hammer and knocked on the starter a little bit. Turned the key and it started.

So it could have been A LOT of different areas. But having an abused tractor and trying to care for it and give it a better life, things wear out.

Key switch replaced
Both battery cable

Thank you again for help.

My folks were stranded in a parking lot, in the rain, and 100 miles away from home while riding a full dress Harley.

Cranking the engine trying to start it, with the battery running low and mom starting to run hot, she kicked the rear tire and shouted "YOU DAM KAWASAKI" and it started running.

 

[transformed]

My folds were stranded in a parking lot, in the rain, and 100 miles away from home while riding a full dress Harley.

Cranking the engine trying to start it, with the battery running low and mom starting to run hot, she kicked the rear tire and shouted "YOU DAM KAWASAKI" and it started running.

Folds? Or was it a typo. Fords?

 

[bigtiller]

Folds? Or was it a typo. Fords?

It was a typo. Folds was changed to Folks.

 

[grsthegreat]

The starter may work fine now….or may fail. Hard to say. Might have just been slightly stuck from non use.

 

[transformed]

Um probably not. This tractor is used quite a bit. Not plowing or mowing. But lifting pallets and metal. Almost every day.

 

[arto98607]

................snip..............

So I grabbed a hammer and knocked on the starter a little bit. Turned the key and it started.

............snip.................

Key switch replaced
Both battery cable

Thank you again for help.

Sounds like the starter motor brushes are either badly worn needing replacement, or they are stuck and not moving down as they wear little bit each time when used.

Usually they are easy to replace by a handyman or shade tree mechanic, once the starter is removed.