Hitch pin size

[Kep1a]

My scraper blade I bought is very old.
It requires a 6" long pin however 3/4" fits very loose and 7/8" is too big to fit at all. Is this normal?

The holes are all still round and not at all damaged. Is it possible it takes a metric pin like 20mm?

 

[RickB]

Cat 1 top link pin diameter is 3/4". If the 3/4" pin fits your top link (and it should), that's the one to use. If your top link is Cat II it will be 1" and there are bushings commonly used to bush down to a 3/4" pin for Cat I implements. A bit of slop won't bother anything.

 

[jeff9366]

Category	Hitch pin size	Hitch pin size	Lower hitch spacing	Tractor drawbar power
	upper link	lower links
0	17 mm (5⁄8")	17 mm (5⁄8")	500 mm (20")	<15 kW (<20 hp)
1	19 mm (3⁄4")	22.4 mm (7⁄8")	718 mm (28")	15-35 kW (20-45 hp)
2	25.5 mm (1")	28.7 mm (1 1⁄8")	870 mm (34")	30-75 kW (40-100hp

 

[CalG]

My scraper blade I bought is very old.
It requires a 6" long pin however 3/4" fits very loose and 7/8" is too big to fit at all. Is this normal?

The holes are all still round and not at all damaged. Is it possible it takes a metric pin like 20mm?

View attachment 711996

Make sure the pins fit the eye in the top link. THAT is important!

The holes in the implement? Not so much.

 

[Kep1a]

well I should have been more clear it is the vertical pins for adjusting the blade arm for angling the blade or to offset the arm.

 

[WranglerX]

Well..........

https://thinlineglobal.com/shop/horse-tack-equipment/lockdown-hitch-pin

Shows 5/8 and 3/4 and 7/8 and 1 inch and I am guessing these are standard sizes, and when equipment is old, get one that fits even if sloppy or re-bore hole to next size up to give fit you want....

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Personally I would go for anything that works and if sloppy, remember its a tractor and non precision implement... Get to exacting in size ii is going to bind up and make changes in the field difficult....

 

[Kep1a]

Some of the holes have never been used and the fit is the same. So they are not worn. Just seems odd. I'm thinking a metric bolt like 20mm may fit better so I may look into that option. I thought possibly there were metric pins used in Europe.

 

[RickB]

You are grossly overthinking this. A domestic blade of that age will be manufactured using Imperial dimensions. The adjustment holes were obviously made oversized to facilitate easy changes. Use a 3/4 pin and enjoy using the tool.

 

[TMGT]

I have the same blade, the original pins are made from 3/4 hot rolled bar stock.

 

[RickB]

I have the same blade, the original pins are made from 3/4 hot rolled bar stock.View attachment 712047

I'm curious is that an old Servis / Rhino blade?