The manual for the JD450 specifically says to cut the notch onto the JD277 and measure the levers at the notch. It has a picture measuring the levers at the notch. I guess the confusion is the change from the 450 to the 450B. Its great to have the actual dimensions from the tool. I would like to set it right the first time.
By the way those adjusting bolts are real tough to get to. If there is a trick, let me in on it.
Setting clutch on a JD450()
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- 440 crawler
- Posts: 139
- Joined: Thu Oct 19, 2017 5:23 pm
- Location: Cle Elum, Wa
Re: Setting clutch on a JD450()
Reporting from the Peoples Republic of Washington State.
Re: Setting clutch on a JD450()
It is great that is specifically in your manual, it always pays to have the right one. I double checked and the 450B manual I have reads as using the 2" tab, so there apparently is a difference between models. So using the notch; you would be setting a lever height of 2.156" (plus or minus the allowance your manual should give you). I checked my 2030 wheel tractor manual and I found where I had read/seen that notch used. Depending on the clutch used and whether or not the tractor has a PTO, the notch was used to set the levers to on some of the John Deere wheel tractors as well.
Where your sketch shows cutting the right side of the tab off on an angle; I found another John Deere sketch showing removing a rectangular section of the original tab 5/8" up from the bottom of the tab and 1-1/4" in from the right side. I believe the this rectangular and your angle modifications were likely for clearance.
Good luck.
Where your sketch shows cutting the right side of the tab off on an angle; I found another John Deere sketch showing removing a rectangular section of the original tab 5/8" up from the bottom of the tab and 1-1/4" in from the right side. I believe the this rectangular and your angle modifications were likely for clearance.
Good luck.
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- 440 crawler
- Posts: 139
- Joined: Thu Oct 19, 2017 5:23 pm
- Location: Cle Elum, Wa
Re: Setting clutch on a JD450()
Thanks again. Great information
Reporting from the Peoples Republic of Washington State.
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- 440 crawler
- Posts: 139
- Joined: Thu Oct 19, 2017 5:23 pm
- Location: Cle Elum, Wa
Re: Setting clutch on a JD450()
One last question. Does the spring clip (called a return clip in the manual) that covers the head of the adjusting bolt need to be removed prior to adjusting? It seems like the only functions is to keep the adjusting screw from turning, but the lock nut should do that by itself. Is that right or am I missing something obvious?
John
John
Reporting from the Peoples Republic of Washington State.
Re: Setting clutch on a JD450()
In certain applications, it will help to pull the pressure plate face away from the discs. Deere never spec'd it in these applications, break them off, throw them away.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
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