Farm Equipment - AC B whine in PTO pulley

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AC B whine in PTO pulley

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207162
Printed Date: 20 Jun 2025 at 3:13pm
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Topic: AC B whine in PTO pulley

Posted By: armorton
Subject: AC B whine in PTO pulley
Date Posted: 19 Jun 2025 at 4:43pm

Hey folks -

'49 AC B, with PTO running a Wood L59 mower deck.

Just replaced both bearings in the idler wheels and two spindles (left and right, center was replaced a few years ago).

Now there is (or maybe there had been and I wasn't noticing it with ear muffs) a whine in the PTO when running the deck. No whine if I run the PTO with the belt off. Checked UTF - was low some, but filled it up, and no difference in whine. I can't tell if the whine is because of bearings on their way out, or the gear that drives the shaft is going to make noise because of how it's cut. Does a proper running setup make much noise?

Also, watching a Youtube video, I see there's an oil tube that receives oil from the differential splashing it up in the PTO, so I suppose that tube could have dropped out. There is a little play in the shaft in and out.

Replies:

Posted By: Les Kerf
Date Posted: 19 Jun 2025 at 11:45pm

I would try listening to the PTO with a broomstick (or whatever, I usually use a BIG screwdriver just because it's handy). Try it with and without the belt installed, also the mower if you can access it safely.