slip clutch

   / slip clutch #1  

woodlot

Gold Member
Joined
Mar 29, 2004
Messages
287
Location
NW Wisconsin
Tractor
NH 1920 w/7308 Loader
Is their a procedure to use to test/adjust a slip clutch to see if its working properly? The clutches are on a tiller and and rotary cutter, both Land Pride, 1997 model. I'd rather not wait untill I hit something to find out there is a problem.

Ps - tiller has not been used much and may have sat for years.
 
   / slip clutch #2  
Woodlot, go to the Landpride web site and down load the manual for your tiller and the slip clutch adjustment will be in the manual.

On mine (Landpride) I back out the adjustment bolts all the way out slip the clutch and run them all the way back in. Manuals
 
   / slip clutch #3  
</font><font color="blue" class="small">( The clutches are on a tiller and and rotary cutter, both Land Pride, 1997 model. )</font>
The clutch setting (spring tension) is based upon PTO horsepower, not the implement being turned. You measure (compressed) spring length end to end. Low hp tractors, loosen bolts for longer springs. Higher hp tractors, dog down the bolts for more spring compression.

That's assuming yours works the same as mine, that is. Tell me what your PTO hp is, and I can reply with the recommended spring length.

//greg//
 
   / slip clutch
  • Thread Starter
#4  
Thank you for the response. I has out looking at the cutter tonight. I seems it has a multi plate "clutch" AND a sheer bolt. The manual call the clutch a "eurocardan" clutch, which I guess is different than a slip clutch. The manual calls a slip clutch a "walterscheid" clutch. Models with a slip clutch also have the "eurocardan" clutch. Confusing. Anyway, my tractor is approx. 30 pto hp.

PS - I will not be able to adjust anything untill I can get the platic PTo shaft guard off. Please see my other post if you can help with that!
 
   / slip clutch #5  
You may have confused it with an over-running clutch. If it looks like this, it's a friction type slip clutch.

If yours is in fact a friction type, you really need to look up the exact PTO horsepower as rating by the manufacturer. Spring adjustments are critical, less than 0.1mm per PTO hp.

But if 30 PTO hp is actually a good number, each spring should be tensioned to tensioned to a length of 28mm.

If it's been exposed to the weather and unused for a year, you might want to disassemble/clean/adjust before using again

//greg//
 

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   / slip clutch
  • Thread Starter
#6  
Thanks Greg. I was confused. I'm beginning to realize that the manual I have for the cutter is really crappy. My clutch is similar to your picture. It is a eurocardan brand. My tractor is a NH 1920. There is a procedure listed to set clutch run-in. It says to back all nuts off EXACTLY 2 turns, run the pto for 2-3 seconds to slip all 4 friction disks, repeat, retighten all nuts EXACTLY 2 turns, done. The manual does not list a procedure to set the springs to different lenghts for different HP PTO's, but as I said the manual really sucks.
 
   / slip clutch #7  
</font><font color="blue" class="small">( . There is a procedure listed to set clutch run-in. It says to back all nuts off EXACTLY 2 turns, run the pto for 2-3 seconds to slip all 4 friction disks, repeat, retighten all nuts EXACTLY 2 turns, done. The manual does not list a procedure to set the springs to different lenghts for different HP PTO's )</font>

That procedure presumes that the tension (a) was correctly set at the factory, and (b) nobody's messed with it since. Plus, if you have to disassemble and clean - it's not going to do you any good at all.

You might want to go to the EUROCARDAN WEBSITE , there's an English translation. They've got a potload of PDF manuals/pamphlets/brochures in at least three languages. If you can get one with the original (translated) Italian instructions, maybe you can see if their spring adjustment technique is in line with mine.

//greg//
 
 
 
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