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D4 main clutch shaft bush

D4 main clutch shaft bush

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Haus
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I'm replacing the main clutch shaft bushing.
[attachment=77196]IMG_20240721_082752112_HDR.jpg[/attachment]

The bush (1F2830) and shaft are worn. Is there already a thread about this? I can't find anything.

Paul
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Wed, Jul 24, 2024 10:44 AM
side-seat
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I've made new shafts and bushings for a few of my D2's and D4's. Gotta orient the woodruff keyways correctly on some of them. Looks like it didn't wallow out the clutch cover casting. I had that before and had to bore the casting true before pressing in new oversize or custom bushing. Check the bushing in the bottom of the clutch compartment too. It may be worn but not as bad as the top one.
Soo Nice having a clutch mechanism that has no play!
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Thu, Jul 25, 2024 7:39 PM
neil
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Reply to side-seat:
I've made new shafts and bushings for a few of my D2's and D4's. Gotta orient the woodruff keyways correctly on some of them. Looks like it didn't wallow out the clutch cover casting. I had that before and had to bore the casting true before pressing in new oversize or custom bushing. Check the bushing in the bottom of the clutch compartment too. It may be worn but not as bad as the top one.
Soo Nice having a clutch mechanism that has no play!
110% agree with side-seat - the improvement in operability and adjustability with slop removed from the linkage is quite possibly the best outcome from the refurbishment of my 5U - the clutch operates with a clean, precise, and minimal operator movement and effort. The new brakes and steering just makes the whole tractor a joy to operate. By comparison, my buddy's HT4 is at the other end of the spectrum and it's hard work, inefficient to operate, and almost impossible to adjust to a stable, usable condition. We're definitely doing steering and brakes in that unit
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Thu, Jul 25, 2024 8:34 PM
Haus
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Reply to neil:
110% agree with side-seat - the improvement in operability and adjustability with slop removed from the linkage is quite possibly the best outcome from the refurbishment of my 5U - the clutch operates with a clean, precise, and minimal operator movement and effort. The new brakes and steering just makes the whole tractor a joy to operate. By comparison, my buddy's HT4 is at the other end of the spectrum and it's hard work, inefficient to operate, and almost impossible to adjust to a stable, usable condition. We're definitely doing steering and brakes in that unit
Luckily the bush wasn't worn through. The clutch cover is ok.

I had a go at building up the shaft with the arc welder. It seems to have worked well.

Paul.
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Fri, Jul 26, 2024 4:51 AM
Haus
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Here are some pictures:

Worn shaft
 [attachment=77226]202407 bulldozer D4 29A77 clutch linkage repair 018.jpg[/attachment]

After welding
 [attachment=77227]202407 bulldozer D4 29A77 clutch linkage repair 019.jpg[/attachment]

Turned back down
 [attachment=77228]202407 bulldozer D4 29A77 clutch linkage repair 020.jpg[/attachment]

I warped the shaft very slightly. Not enough to be worth straightening though (I think). Not sure what else I could have done to keep it from warping other than get it hotter before starting to weld.

Paul.
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Sat, Jul 27, 2024 11:08 AM
Haus
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Does anybody know if this is an original grease point, or is it something added later?
[attachment=77233]Grease nipple.jpg[/attachment]

The bush I removed did not have a hole to permit grease entry.

Paul.
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Mon, Jul 29, 2024 9:22 AM
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