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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JD 450 clutch free play on HLR

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Phil - MO

10-09-2006 02:34:19

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Roy Suomi or anybody that knows:

I have no spring tension when adjusting the 3 3/4" free play on the clutch pedal. The pedal has no resistance at all.
In an earlier post you said if the linkage is rusted the adjusting bolt on the clutch will raise up as you turn it out. This is what I have and I thought maybe the return spring was broken.

I'm getting ready to leave in a couple of hours to drive to the farm to work on it.

I woke up early thinking about this.
IS THE CLUTCH LINKAGE THAT RUSTS AND BINDS UP on the outside and accessible to work on???

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Roy Suomi

10-09-2006 04:51:47

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Re: JD 450 clutch free play on HLR in reply to Phil - MO, 10-09-2006 02:34:19

Slight possibility of broken spring..Not likely..It would be better to remove the clutch housing to free up the linkage..It will probably need heat and a hammer to free it up.Plus I always neverseize the devil out of it, so it won't seize again. It's a good bit of work but, it will pay off..If the spring is shot, the clutch housing has to come out anyhow...Now would be a good time to check the clutch actuating shaft that goes into the HLR..

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Phil - MO

10-09-2006 05:39:36

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Re: JD 450 clutch free play on HLR in reply to Roy Suomi, 10-09-2006 04:51:47

I guess I don't really understand what is going on.
When I started to do these adjustments, the clutch pedal was tight against the rest stop with no free play. I read that the first half of pedal depression releases the HLR and the last half the clutch.

I backed off the clutch adjusting bolt until I could move the clutch back and forth 3 3/4" with my hand. I did notice that the bolt head going into the clevis of the clutch adjustment raised up to give this clearance. I couldn't understand why I needed all this free play.
I then did the HLR adjustment as you have written about before and the manual suggests. Everything seems to shift and work OK for awhile with this adjustment, but I don't understand why the clutch pedal has to move this far before feeling any resistance.

Thanks again for the assistance.

Just how much resistance should I feel when I depress the clutch pedal by hand the first 3 3/4"???

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Roy Suomi

10-09-2006 08:45:30

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Re: JD 450 clutch free play on HLR in reply to Phil - MO, 10-09-2006 05:39:36

The top of the pedal should be relatively easy to push down with your hand..Mostly spring tension from clutch housing internal spring till the throw-out bearing contacts the pressure plate fingers. Then it should be quite a bit tougher to depress to disengage the engine clutch..The top free-play is shutting off oil in the HLR transmission..It's kind of tough to understand unless you analyze the workings of the transmission..

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