Hello my favorite tractor peeps. My newest issue after replacing the fuel shut-off solenoid, relay moduel and and all the seals on the hydraulic cylinders I find that the tractor now starts properly but dies when put into gear. My father whom we inherited the tractor from had cut the seat safety switch to override prior to all the reports and it was working fine. I'm wondering if after repairing the relay if it now needs this switch to be reattached in some way or of it could be something else. Any suggestions.
JD 770 Dies when put in gear.
- Thread starter toni45
- Start date
bmaverick
Elite Member
- Joined
- Sep 17, 2013
- Messages
- 4,623
- Location
- Beloit-WI
- Tractor
- Yanmar YM2610 ■YANMAR GURU■ EXTRAORDINAIRE
Do you have the manual?
TM1470 Technical Shop Manual 670 770 790 870 970 1070.pdf
This has the schematics you would need to correct the problem and a the trouble shoot section to eliminate issues too.
D
Deleted member 216442
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Likely pto or seat safety switch the culprit, I'd check seat switch first and its wiring. I developed an intermittent problem on my 1070 years ago that turned out to be the seat safety switch plunger - From seat bouncing, it had developed a thinned area with an abrupt change to the original diameter that would sometimes catch and support the plunger from plunging, and act like I was off the seat, where it was supposed to slide. Lifting the seat and moving the plunger by hand didn't expose the problem. Disassembly and inspection did. Difficult troubleshooting but easy fix. The switch itself was fine electrically, but the operating plunger rod had worn. It started showing up when mowing on a sidehill - the tractor would just totally cut out while running fine. And occured only when in gear or with pto engaged. If your Dad didn't remove the seat safety switch and/or its wiring, I'd start there, and I would not bypass it. It works fine at 2700 hours use. To run an implement with the pto while off the seat you can lift the seat and just pull the plunger up. The plunger problem showed up at about 1700 hours.
I appreciate everyone's advice and help. So far it has helped me tremendously and almost everyone is spot on in their advise. This is not something I have ever done before nor would have thought about attempting but when money is tight we learn to try and repair things on our own. I'm sure it would have taken a man afew hours to repair. That being said is the first picture for the safety switch and the picture of the bypass for the pto switch. I'm looking at the schematic but I don't think the colors are matching up. How would the tractor work without the safety switch just being cut? I have to be missing something else.