1986 Ford 1710 Won't start

erock29 · Mar 14, 2015

So my '86 1710 won't start. Ran well up until a couple weeks even through the -10F temps here in Feb. Last time out I plowed some snow from the drive & put it away in the barn like normal. Now it won't turn over, no click, nothing. Interstate battery is new (3 months) & has a full charge. Starter/solenoid bench tested just fine at my local auto parts store. Checked the four fuses & they are fine. Lights work, glow plugs work but it doesn't turn over or even click when I try to start. I even adjusted the clutch pedal to minimize free play. No obvious loose or broken wires.

Any advise where to look next guys? Thanks!

xpkson · Mar 14, 2015

All clutch operated engines that I know of have a
safety switch when you push in the clutch or a
neutral switch.

Shetland Sheepdog · Mar 14, 2015

Safety switch on PTO? Did PTO get accidently engaged?

erock29 · Mar 14, 2015

I've tried engaging/disengaging the PTO but it doesn't make a difference. Thanks!

erock29 · Mar 14, 2015

Right, it has a safety neutral switch and from what I've read this is magnetic in the trans? Your also right, the clutch needs to be engaged for it to start.

I think it's some switch or minor thing but I've only had this tractor ~ 1yr and am not sure if this machine is prone to a certain type of "switch" problem.

Thanks for the reply!

RickB · Mar 14, 2015

1710 has either a clutch pedal NSS or internal proximity switch in the transmission. Either or, not both. No PTO NSS on any 1710.

old · Mar 14, 2015

Make sure it is in neutral before you try this. At the starter solenoid there are 2 big studs, jumper across those and see if it spins over/starts. If it spins over then you have a safety switch problem or a bad wire some place.

Shetland Sheepdog · Mar 14, 2015

Rick, I did not realize that the 10 series tractors didn't have a PTO safety switch, I know that the 20 series did. Had that very problem with a 1920! :roll:
Thanks, Dave

erock29 · Mar 14, 2015

So I tried jumping the solenoid and the starter is spinning. The engine did not turn over just heard the starter gear spinning.

So sensor? Any suggestions where to start?

RickB · Mar 14, 2015

Engine didn't turn because the solenoid coil was not energised to pull the starter drive into the ring gear. All you proved was the starter motor works and the main battery cables & connections are sound. Could be a bad soleniod, bad NSS, bad safety relay, bad key switch, broken wire to or from any of the above. Check for power at the small wire leading to the starter solenoid coil while the key is in the crank position. If you don't have power there with the key in 'start', follow the circuit back until you figure out why. IIRC, the transmission NSS completes the ground path for a NSS relay coil that completes the circuit between the key switch and the solenoid.

erock29 · Mar 14, 2015

Thanks Rick

old · Mar 14, 2015

Now that you know it is not a bad starter try the small stud on the solenoid and the battery side big stud and see if the engine spins over that way. That will tell you if it is the solenoid or a safety switch

1986 Ford 1710 Won't start

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