IH 37 baler slip clutch

burnsg2003 · Aug 1, 2014

I have a IH 37 baler. The clutch is slipping badly can I just tightened the bolts on the clutch or do I need to rebuilt.Also, are there specs as to how tight to tightened the bolts.
Thanks in advance for your help

pete 23 · Aug 1, 2014

There is a spec on how much torque it takes to slip it but I have no idea what it is anymore. I would block the plunger and see what it feels like to make it slip and then start tightening it until you are satisfied that it will still slip if need be but operate the baler under normal conditions. Maybe just tighten a little at a time and bale hay.

JRSutton · Aug 2, 2014

I forget the spec too - it's very high - I believe the manual use a 10' breaker bar on it with 50 pound force - something like that. (to test the clutch of course - NOT on the bolts themselves)

I'm wondering though if you're sure it's the clutch itself that's slipping, or is it the overdrive ratchet part (for lack of knowing what the real word is)

Where the pto shaft comes in, that usually has block with two little spring loaded "dogs" (that you can't see) and they ride in a groove on the face of the clutch and in that is a series of ramped teeth (which you can see).

Sometimes those springs can give out - or the two dogs (steel dowel pins) can get worn, etc.

So if that happens, pto shaft can spin, but the rest of the clutch won't.

It can happen intermittently, and it can give the appearance of the clutch slipping if you don't look closely and/or don't think it through.

I've seen that situation happen more often than the actual clutch slipping.

JRSutton · Aug 2, 2014

to be clear -

There's no way to spec a torque just for the bolts and get that slippage torque right.

You have to get the spec (estimating but probably way off) like a 10' pole with 50 pounds hanging on it.

if that makes the clutch slip - you have to tighten each bolt just a little bit - and do all of them an equal amount.

just keep repeating till it stops slipping.

JimB2 · Aug 2, 2014

Hi, just a thought, our IH 46 baler came with 4 rectangle pieces of steel about 1 inch long that you inserted in the PTO slip clutch at the end of the season to prevent the clutch disk from freezing to the metal surface. You inserted these steel pieces a gave them a 1/4 turn and they spread the PTO slip clutch apart.

JimB

IH 37 baler slip clutch

burnsg2003

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pete 23

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JRSutton

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JRSutton

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JimB2

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