Slip Clutch ?

mgrick · Jul 31, 2003

The clutch is a 1 3/8 smooth male/female.I haven't made any adjustments to it,I guess I'll just leave it the way it is then.This thing ran super quiet though till I put the slip clutch on.

Also the noise is more pronounced while mowing.I guess if somethings not right it will show up one way or another.I suppose as John says it would be smoking if it was slipping that bad.

Rick

Egon · Aug 1, 2003

Just by feeling the gear box you may be able to tell by the temperature if the clutch is slipping.

Egon

sweettractors · Aug 1, 2003

Hi Rick--With the round to round configuration, There is a 1/2 X 3 1/2 inch grade 8 bolt the retains the clutch to the Brush Hog gearbox and also the same size bolt that holds the PTO to the clutch. Maybe you have a smaller diameter bolt in one or both of these places and have some lost motion in the connection? This would most likley create low pitch vibration sound----Check it out--Ken Sweet
Sweet Farm Equipment *Inexpensive Nationwide Shipping*

Bob_S · Aug 1, 2003

Henro,

I have the same cutter and slip clutch. On mine the slip clutch was over tightened or frozen at time of deliverly. The manual states to check it when new and the start of each season. You should check yours it out or you might have the same supprise I had the first time I hit something. /forums/images/graemlins/wink.gif This was something I would have expected my dealer to do at time of setup but when I questioned the dealer, I got a blank look. I have since serviced the clutch and it now works fine. PS hows the chains? I have some on order.

mgrick · Aug 1, 2003

Ken it's funny you should mention that.That was the first thing I thought.When I put the slip clutch on the first time I noticed that the 2 grade 8 bolts that came with it,neither one seemed to be quite a 1/2 inch in dia.There was a lot of play in the yoke and clutch on the output shaft.So I went to the local hardware store and picked up a 1/2 x3 grade 8 for the back hole and a grade 5 for the front hole where the yoke attaches just in case somethings not right I have a little bit softer bolt to break.

Rick

sweettractors · Aug 1, 2003

Hi Rick--That takes care of that--The only thing left that I can think of: Is if the shaft is not too short, could the mfgr. have missed the ID bore on the female end or the 1 3/8 OD diameter on the male end?--Ken Sweet
Sweet Farm Equipment Co. * Inexpensive Internet Shipping*

JohnMiller3 · Aug 2, 2003

Re: Slip Clutch-2 plate-spring adjustments for 28 PTO hp

<font color="blue">( my DK35 has a PTO rating of 28 hp.With no manuel how do I know the spring tension ) </font>

Using a digital caliper, get a spring height reference... check a couple springs for an average (write down this number and save it in your records)

I'm assuming a spring thickness of 6 mm (most popular used out of 3 sizes)... (numbers are rounded off)

Using a 28 PTO hp tractor =3224 in/lbs.=364 nm (average)
5504 in/lbs=621 nm (peak/clipping) <----You want around here.

2-plate slip clutch with 6mm springs-
Slip clutch adjustments=spring height (all 8)
4800 in/lbs.=540 nm=29 mm
6000 in/lbs.=680 nm=28.5 mm

Your average spring ht. should be around 28.75 mm for your 28 PTO hp tractor for average torque limiting...

mgrick · Aug 2, 2003

Re: Slip Clutch-2 plate-spring adjustments for 28 PTO hp

Thanks John.I'm still trying to figure why I'm hearing the metal rubbing sound with the clutch on.If it's just parked and running I don't here it.It's when I start mowing I'll pick up the noise so it's hard to tell exactly where it's coming from.

Rick

BrettW · Aug 3, 2003

Re: Slip Clutch-2 plate-spring adjustments for 28 PTO hp

I'd just take it back or send it back. Tell them it's not right and you don't know why. You didn't fool with it, but do expect it to work and protect you and your machine. Any problem with the return and they become liable for you and your machine. Just get it in writing. This is a malfunctioning piece of safety equipment. Get one that works. You paid for a good one. bw