Hitch pin size

   / Hitch pin size #1  

Kep1a

Bronze Member
Joined
Oct 27, 2017
Messages
57
Location
Tucson
Tractor
Montana 2840
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?

20210828_142029[1].jpg
 
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   / Hitch pin size #2  
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.
 
   / Hitch pin size #3  
CategoryHitch pin sizeHitch pin sizeLower hitch spacingTractor drawbar power
upper linklower links
017 mm (5⁄8")17 mm (5⁄8")500 mm (20")<15 kW (<20 hp)
119 mm (3⁄4")22.4 mm (7⁄8")718 mm (28")15-35 kW (20-45 hp)
225.5 mm (1")28.7 mm (1 1⁄8")870 mm (34")30-75 kW (40-100hp
 
   / Hitch pin size #4  
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.
 
   / Hitch pin size
  • Thread Starter
#5  
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.

image0.jpeg
 
   / Hitch pin size #6  
Well..........


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....


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....
 
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   / Hitch pin size
  • Thread Starter
#7  
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.
 
   / Hitch pin size #9  
I have the same blade, the original pins are made from 3/4 hot rolled bar stock.
20210901_195237.jpg
 
 
 
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