speed control switch

[LOU33]

Is there an adjustment on the speed control pedal linkage on my B7800?
To start the tractor , I have to manipulate the speed pedal until it gets in the neutral position.

In addition to being a starting issue, if I get off to move to the backhoe, it often kills the engine; also, the tractor tends to creep when I don't have the pedal depressed

Thanks,

LOU33

 

[birddogger]

The easy starting place is to give the motion pedal pivot a couple good pumps of grease. There's a grease fitting where the pedal rocks, under the foot-board.
If that doesn't get it, follow the linkage to the other side of the HST case; there's a neutral-finding plate sort of shaped like a wide "V" that a spring loaded bushing rides in, that roller pressing to the valley of the "V" is supposed to push it back to neutral. Linkages could be gummed up along the way or the pressure spring could be off or broken. Or as one operator found the linkages had enough slop worn into the holes that even though it was finding neutral there was enough lost motion that it didn't really get into the HST.

You say "sometimes" it shuts down when getting out of the seat; are you "sometimes" having the PTO engaged when that happens? It is s'posed to shut down if you have PTO going and get off the seat.

Or that could be the same problem as not finding neutral, it thinks you are in motion and bounced out of the seat so shuts down.

 

[LOU33]

Thanks, Bird dogger,

I keep the PTO disengaged because I don;t need it for anything (having a mounted backhoe).

Yes, I believe the unwanted stopping is caused by the neural position on the pedal controls.

MY question was generated by some conflicting info from the dealer and his mechanics. When I first experienced this problem they took my machine in to the shop and returned it after replacing another interlock switch which I had already determined was not the problem. The tractor was backed off the delivery truck but when I tried to restart it a few minutes later , it wouldn't' start.

The shop referred me to the delivery driver who said that wiggling the speed pedal would often allow a start; this was when I found out about the speed control linkage. Two mechanics came to my place, looked at the linkage and said it was worn out and there was no way to adjust it (at the time, there were only 130 hours on the tractor and it was kept in a shed and never operated in the rain).

I then talked to the dealer who said that sounded funny and he talked to another mechanic, who said there was an adjustment. See why I was confused?

It started workings OK by itself so i never had them come out to adjust it. Just recently, it's acting up again, so I thought I'd tackle the problem myself.
Incidentally, it has only 145 hours on it now.

I'll try your suggestions and let you know how it goes.

Thanks again

 

[birddogger]

There is an adjustment screw. It supposedly never needs adjusting. If yours wants to always go forward (lets say) and never wants to creep backward maybe a tweak could help. If it creeps either direction, depending on if you stopped from reverse or forward; the adjustment probably won't help.

Here's a thread that discusses it. http://www.orangetractortalks.com/forums/showthread.php?t=5685&highlight=neutral+adjustment+screw

 

[LOU33]

Hey Birddogger,

The grease pretty well did the job! I used the tractor for an hour and it never died when I got off and always restarted when I tried it. Later, I tried starting it again and it acted up a little but I think I'm on the right track now.

Thanks very much; I've been better than a year trying to get the dealer's people to resolve it, and they could never decide if something needed to be replaced or not.

 

[birddogger]

Good to hear. It may still get fussy on cold mornings. The best grease would probably be old-fashioned "Lubriplate" light grease; but that would mean a dedicated grease gun for one pivot point. Heavy greases just get sluggish on cold mornings. As long as you understand and can work around that.