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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JD 450 Clutch Adjustment

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Tweeter

11-19-2006 06:10:54




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Adjusted the clutch pedal and HLR linkage like the manual says for a HLR unit. When trying to shift through the four gears on the left armrest, they grind into every gear. They did this before the adjustment too. When I made the clutch pedal adjustment, the pedal did not spring back up to the stop. I then started to turn the HLR nut counterclockwise and the pedal eventually returned to the stop. Then I turned the HLR nut clockwise until the pedal just pulled away from the stop and then backed it off like the manual describes. I also noticed that the oil line that runs along the left side of the transmission housing had a pin hole in it. Where does that steel line run to?

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Roy Suomi

11-19-2006 15:15:29




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 Re: JD 450 Clutch Adjustment in reply to Tweeter, 11-19-2006 06:10:54  
Sounds like the pedal pivot is frozen on the clutch shaft..Where that 3/4" headed bolt is next to the pedal , there's a linkage arrangement down there that has to be free..Or else it won't work correctly....



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RTCTransport

12-25-2006 20:27:45




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 Re: JD 450 Clutch Adjustment in reply to Roy Suomi, 11-19-2006 15:15:29  
just having the same problem with my JD450
will try you suggestion on adjusting clutch as my manuals havent came in yet



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Tweeter

11-19-2006 16:50:42




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 Re: JD 450 Clutch Adjustment in reply to Roy Suomi, 11-19-2006 15:15:29  
The clutch pedal was stuck to the shaft that enters into the housing but I freed that up before making the adjustment. When I adjusted the HLR nut, the nut was near bottom. I had to unscrew it almost all the way off in order for it to come in contact with the clutch pedal. Is the hydraulic steel tube on the left side of trans. housing for the power steering?



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Roy Suomi

11-19-2006 20:44:48




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 Re: JD 450 Clutch Adjustment in reply to Tweeter, 11-19-2006 16:50:42  
The steel line is steering..The HLR adjustment nut should be somewhere midway from top to bottom of threads.. OK 1 last time..; first , adjust the clutch bolt to 3 and 3/4" "freeplay" from top of pedal to where you feel the fingers of the clutch contact the throw-out bearing..Back off the adjustmrnt inside the clutch housing rubber plug so the pressure drops off to about lets say 50 lbs. Turn the nut in and watch the pressure guage . It should go to it's maximum pressure then drop off slightly , without pulling the clutch pedal off it's stop.If it pulls the pedal off it's stop before it gets to it's maximum pressure , there's a problem in the HLR clutch operating shaft or roll pins..Once you have your max. pressure ,push in the clutch pedal about 1/2" the oil pressure should raise about 5-10 lbs..Now you're gonna have to fine tune that adjustment from there.The speed of shift shouldn't be so fast that you can't shift from reverse to forward at wide open throttle without using the clutch pedal..Optimum pressure for HLR is about 180 lbs operating pressure..

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Tweeter

11-20-2006 14:27:21




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 Re: JD 450 Clutch Adjustment in reply to Roy Suomi, 11-19-2006 20:44:48  
Thanks. So basically, I should be watching the pressure as I make the clutch adjustment. I got my pressure gauge and grease gun hose. Do I need the coupler for a grease fitting or does the hose screw into the other after I remove the allen head screw? Will I be able to buy the power steering steel line from my JD dealer or can I find it somewhere else?



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