1772 starter issue

[FrankF3]

Originally Posted by aagitch

That other switch is used to select the rear or front pto and the main switch is the on/off

Exactly! The main switch up on the dashboard will shut off the power to the PTO, the other switch simply directs which PTO (front or rear) will be engaged.

[inboardnut]

..that makes me feel better. So, if the main PTO switch is bad, the rear wont work either?

[inboardnut]

Well, I installed the new PTO switch tonight and the starter seamed to engage the first time I turned key to "start" position on every attempt.(only tried 5 or 6 times-so time will tell).

Front PTO works fine , but rear PTO engages when the switch is in "start" position. When the new PTO switch returns to "run" position the rear PTO stops.

Ran out of time to do more investigating. Is there a power feed wire from the back of the new PTO switch to the rear switch selector that that could be loosing power in run position?

Any other ideas where /what to check?

[FrankF3]

Originally Posted by inboardnut

..that makes me feel better. So, if the main PTO switch is bad, the rear wont work either?

That is correct. Bear in mind, you could have an interlock/safety that is giving you grief as well.

[FrankF3]

Originally Posted by inboardnut

Well, I installed the new PTO switch tonight and the starter seamed to engage the first time I turned key to "start" position on every attempt.(only tried 5 or 6 times-so time will tell).

Front PTO works fine , but rear PTO engages when the switch is in "start" position. When the new PTO switch returns to "run" position the rear PTO stops.

Ran out of time to do more investigating. Is there a power feed wire from the back of the new PTO switch to the rear switch selector that that could be loosing power in run position?

Any other ideas where /what to check?

Do you have a wiring diagram for the 1772? The previous owner could have done some modifications or mistakes while doing repairs to the wiring harness.

[inboardnut]

No, I do not have a wiring diagram for it.

I did have one of the wires pull out of the double plastic plug end on what I think is the neutral safety of the PTO.

There is also a 3 wire connector on the switch.. could one of these wires be a constant power feed to rear switch? (this could be where wiring diagram would help lol )

[inboardnut]

Originally Posted by FrankF3

That is correct. Bear in mind, you could have an interlock/safety that is giving you grief as well.

...any idea what safety could let front work and rear not? ... also, rear pto engages with switch in start, but not in run position.

[Oak]

I agree with Frank. The front and rear should be wired in parallel with the selector switch choosing the front or rear. It could be that the PO bypassed the reverse relay switch for the front pto if he didn't use the back. That would explain why it pulls in in the start position. I would see if Roland can send you the schematic to aid in the troubleshooting. Good luck and let us know what you find.

[inboardnut]

Thanks for all the help!!
I'm finding it kind of hard to find much info on the 1772.... some close models, but not on it.

The rear PTO has always worked in the past.

It just hasn't since I "fixed" it! lol

I really didnt get a chance to check wiring after replacing the PTO switch last night. I hope to get some more time to check it out this weekend. I have to bring some dirt in our yard to repair the hole where I had a stump ground out. The rear tiller could sure come in handy!

[FrankF3]

Here is the Schematic for a 1772. Don't know if it will be readable. Can you PM me and I will send it to you?

1772Schem.jpg