B7610 stalled with pto engaged, now will not start

[Craig T]

I was mowing up a berm (belly deck) when I high-centered and stalled the motor. Set the PTO back to neutral, clutched it, but when I turned the ignition, nothing but the buzzing of the starter relay under the dash cowl (I tracked the buzzing to that component). Normally, the amber glow plug lamp lights up in the dash when the key is in acc position heading towards start, but not any more. I shifted the PTO selector several times to ensure it was disengaged (even visually verified the switch had no contact) and checked all dozen safety switches with my meter. Still nothing, except for a sketchy positive cable terminal (was only SOLDERED in, so I hydro-crimped it). It's almost like the mid PTO was still engaged and preventing the motor from turning over. I bypassed the solenoid and the starter motor tried to jump but seemed bound up. The machine is VERY difficult to push, as if the hydro drive is still engaged. Is there a way to force the hydro drive to disengage (my other machine had a lever that disengages the hydro to allow easy rolling), or likewise force the PTO to disengage? I suspect the machine still thinks it's mowing and will not allow the motor to turn. Thanks!

 

[North Idaho Wolfman]

Push the clutch pedal in.
That disengages everything from the motor back.

You can also move the range level to neutral, But the PTO could still be engaged.

 

[Tx Jim]

Welcome to this forum
I suggest to check battery voltage & load test battery. If battery passes test then clean/tighten all four battery cable connections.

 

[GreensvilleJay]

'buzzing pf the starter relay' indicates NOT a 'safety switch' problem.
As TXJim points out,remove all battery cables,clean them very well, reattach, try again.
a 'buzzing' relay indicates insufficent voltage getting to the coil. tries but fails,over and over again.

 

[Craig T]

I tested the battery and it's good. Also checked and cleaned all four battery cable connections and replaced the positive cable just because I'd found a flaw in it earlier. Issue remains. No help clutching when attempting to start either.

 

[North Idaho Wolfman]

If you can't get it to crank when you jump the solenoid you have a serious issue, like the motor being locked up.

 

[Henro]

If you can't get it to crank when you jump the solenoid you have a serious issue, like the motor being locked up.

It’s been quite a while since I looked at the starter on either of my tractors, and probably the only one I looked at was the BX 2200 starter, when I installed the interposing relay between the safety contacts and the small terminal on the starter that picks up the starter solenoid.

At the time I remember thinking, or rather wondering, how one would jump the starter and get it to turn the engine over if the solenoid had failed within the starter.

My conclusion was that even using jumper cables to provide a solid 12 V to the power terminal of the starter, would not cause the starter to turn if the internal solenoid failed to operate, or if the starter armature failed in the "open” state.

So I’m puzzled by the comment that if you jump the starter and the engine doesn’t turn over one would have a serious engine issue. My inclination would be to first be suspicious of a starter motor problem…

Perhaps the OP’s B 7610 and my B 2910, are different than my BX?

Since pushing the clutch pedal changes nothing, this certainly does indicate the issue is likely on the engine side of the clutch.

What I am missing?

 

[North Idaho Wolfman]

It’s been quite a while since I looked at the starter on either of my tractors, and probably the only one I looked at was the BX 2200 starter, when I installed the interposing relay between the safety contacts and the small terminal on the starter that picks up the starter solenoid.

At the time I remember thinking, or rather wondering, how one would jump the starter and get it to turn the engine over if the solenoid had failed within the starter.

My conclusion was that even using jumper cables to provide a solid 12 V to the power terminal of the starter, would not cause the starter to turn if the internal solenoid failed to operate, or if the starter armature failed in the "open” state.

So I’m puzzled by the comment that if you jump the starter and the engine doesn’t turn over one would have a serious engine issue. My inclination would be to first be suspicious of a starter motor problem…

Perhaps the OP’s B 7610 and my B 2910, are different than my BX?

Since pushing the clutch pedal changes nothing, this certainly does indicate the issue is likely on the engine side of the clutch.

What I am missing?

If you bypass the solenoid on the starter the starter will spin but not engage the flywheel.
If you jump the solenoid as I stated it will engage the starter to the flywheel and spin the starter.
This tells you the issue is before the starter solenoid if the motor spins.
If you do this and it engages the solenoid and attempts to turn the starter it could be a bad battery, connections, starter or locked up engine.
If you have eliminated cables, battery, then that leaves starter or motor issue.
You could simply turn the motor by hand to eliminate locked up engine.