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Reload this Page QL: PTO belt slips when STOPPING PTO
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  #1  
Old 06-30-2011, 01:17 AM
cledford cledford is offline
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Default QL: PTO belt slips when STOPPING PTO
I have a 1450 I'm getting back online. It worked fine, but had a bad PTO shaft oil seal leak. I pulled the PTO to replace the seal. When I replaced the PTO I was sure to set the "air gap" with the proper width feeler gauge.

I just got everything back together and fired her up. Things were running fine (after engaging the PTO with deck mounted) until I turned the PTO switch OFF, there was sort of a "bang" and the belt popped off as the PTO stopped turning. (belt came off PTO pulley) The bang I describe may not have been noticeable normally - but I still have the hood/cowling/nose-piece removed. The belt is the same one used before and nothing else has changed. (same mule drive also) I have checked the PTO since the belt popped off and it still works. I haven't given it another it another try as I don't want to chance messing up the PTO or the belt.

Any ideas?

Thanks!

-Calvin
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Old 06-30-2011, 06:54 AM
R Bedell R Bedell is offline
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Well, that could be a number of things.
Quote:
there was sort of a "bang" and the belt popped off as the PTO stopped turning
What comes to my mind is two fold. I would look at the (A) Brake mechanism for proper adjustment, or (B) the PTO Bearing to see if it is bad.
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Old 06-30-2011, 09:07 AM
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Matt G. Matt G. is offline
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Are you turning the clutch off at or near idle? If not, you should be. It is hard on the clutch and belt if you don't.
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Old 07-01-2011, 11:57 AM
cledford cledford is offline
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Well, issue resolved - but, due to time constraints, I can't say what did it. I did the following:

- put a 2nd shim in as the gap between driven and driving hubs/disks was .050 with the manual stating it should be .060-.090. Only one shim came out when I disassembled but who knows...

- flipped belt over. Since it had already been in use, someone suggested it might have a memory.

- reinstalled the outer plate and did not torque the nuts down as much. I had gapped it the first time around and thought I had it right - but figured I'd give it a shot. I'll now work them down incrementally until back into spec or have an issue. This isn't hard as it might be as I haven't reinstalled the nose piece and hood yet.

Matt, thanks for the advice on when to/not turn PTO on and off. I didn't know.

Calvin
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Old 07-01-2011, 12:03 PM
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Quote:
Originally Posted by cledford View Post

Matt, thanks for the advice on when to/not turn PTO on and off. I didn't know.

Calvin
Don't feel bad, I had NO idea about undo stress on the PTO's engaging at WOT either, till I started reading and getting advice here too. No telling how many PTO's I engaged wrong up till this point.
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Old 07-01-2011, 12:45 PM
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CC1450 CC1450 is offline
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guilty of engaging and shutting off PTO at WOT myself. Just one of those things you don't know any better about until someone tells you. Just another reason to love this forum!
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Old 07-01-2011, 04:01 PM
R Bedell R Bedell is offline
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I knew about engaging the PTO at a lower motor speed, but never heard of lowering the motor speed when disengaging the PTO. I don't know or can think of the reason around that part.
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 07-01-2011, 04:17 PM
Merk Merk is offline
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Is there a brake on the pto?
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Old 07-01-2011, 10:55 PM
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The electric clutches have a brake that'll wear if it's trying to bring the deck to a dead stop from 3600 rpm.
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