Front loader for a B7200

[Paul Allwood]

G'day all

I'm in the process of building a front loader for my recently acquired B7200 and have a question about pins and bushes.

I've bought some steel bushes with greasable 5/8" pins that are normally used for trailer leaf springs (see pic). In loaders such as the B1630/B1640 would it be normal to use a greasable pin into a steel bush, or is there normally a bronze bush fitted as well to allow for wear and replacement ?

If needed, there's plenty of size in the steel bush that I could bore them out to fit a bronze bush and still have plenty of steel left to weld.

I've also attached some pics of the progress on the loader - so far I have the sub-frame mostly done, roughly copying the sub-frame in the B1640 loader manual.

I'm interested in your thoughts.

Thanks

 

[PoTreeBoy]

My pins are considerably larger than that, but they are steel on steel. I'm pretty sure that's common on small tractors. I think that's why the lube interval is only 10 hours (plus, they're not sealed).

 

[Paul Allwood]

My pins are considerably larger than that, but they are steel on steel. I'm pretty sure that's common on small tractors. I think that's why the lube interval is only 10 hours (plus, they're not sealed).

Thanks

 

[Paul Allwood]

My pins are considerably larger than that, but they are steel on steel. I'm pretty sure that's common on small tractors. I think that's why the lube interval is only 10 hours (plus, they're not sealed).

Do you know what diameter your pins are ?

 

[North Idaho Wolfman]

You want 1" minimum pins.
(Technically 7/8 but they are harder to find.)
5/8 is way too small.
Steel on steel no bronze bushings.

 

[Paul Allwood]

You want 1" minimum pins.
(Technically 7/8 but they are harder to find.)
5/8 is way too small.
Steel on steel no bronze bushings.

Thanks, 25 mm sounds like a plan.

 

[TheOldHokie]

Thanks

The B1630 had zerks on the cylinder eyes and ordinary 3/4" steel pins with a locking tab to orevent them from rotating. There were no servicable bushings - the pins were fit to welded in mild steel tubing. It used commodity welded cross tube loader cylinders with a 1.5" bore.

My advice - its a small lightweight tractor- resist the urge to over build.

Dan

 

[PoTreeBoy]

Do you know what diameter your pins are ?

On the TL720, the pins are nominally 30 mm. Many of them have the zerks recessed in the end of the pin, to protect the fitting I suppose. As @TheOldHokie said, most have bolts through tab retainers. I think this prevents the pin from rotating, limiting wear to the inner part

 

[TheOldHokie]

On the TL720, the pins are nominally 30 mm. Many of them have the zerks recessed in the end of the pin, to protect the fitting I suppose. As @TheOldHokie said, most have bolts through tab retainers. I think this prevents the pin from rotating, limiting wear to the inner part

The B1630 was minimalistic. Here is a bottom bracket and pin. No bushings. No bolts. Just a 3/4" pin snd welded tab with one edge bent down. No significsnt wear in my 30 year ownership.

Dan

 

[Paul Allwood]

The B1630 had zerks on the cylinder eyes and ordinary 3/4" steel pins with a locking tab to orevent them from rotating. There were no servicable bushings - the pins were fit to welded in mild steel tubing. It used commodity welded cross tube loader cylinders with a 1-3/4 bore.

My advice - its a small lightweight tractor- resist the urge to over build.

Dan

Thanks Dan

 

[Paul Allwood]

On the TL720, the pins are nominally 30 mm. Many of them have the zerks recessed in the end of the pin, to protect the fitting I suppose. As @TheOldHokie said, most have bolts through tab retainers. I think this prevents the pin from rotating, limiting wear to the inner part

Thanks

 

[Paul Allwood]

The B1630 had zerks on the cylinder eyes and ordinary 3/4" steel pins with a locking tab to orevent them from rotating. There were no servicable bushings - the pins were fit to welded in mild steel tubing. It used commodity welded cross tube loader cylinders with a 1-3/4 bore.

My advice - its a small lightweight tractor- resist the urge to over build.

Dan

Thanks Dan - the urge to over-build is always pretty strong.

 

[TheOldHokie]

Thanks Dan - the urge to over-build is always pretty strong.

I just realized I misspoke - the B1630 cylinders were 1.5" bore.

Dab

 

[Paul Allwood]

I just realized I misspoke - the B1630 cylinders were 1.5" bore.

Dab

All good Dan, thanks again.