CAT 2 Top Link Hole Size

[Billy NY]

I've always wondered why some implements have a 7/8" diameter top link hole, anyone know why ? I've got an old McConnell rear blade and the top link hole is 7/8". I have not found a way to bush up from 3/4" CAT 1 pin or 1" CAT 2 PIN. Have not looked in McMaster-Carr for a bushing, assuming there is one that would take up the space using a 3/4" top link pin. My for 4630 has a top link with CAT 2 on the tractor end, and CAT 1 on the implement end.
 

[SVcummins]

If it has the old style John Deere top link with the hook and removable ball they make a cat one or cat 2 ball
 

[DeltaRed]

Standard Cat 2 is one inch.are you sure it's not just a wallered out 3/4" hole.There is no bushing for what you want to do. Just drill it out to one inch.
 

[Traditional Farmer]

I've seen that and I found a piece of pipe sleeving at Tractor Supply that worked about perfect in the welding supply area.Just cut the bushing to fit and used a grade 8 bolt as a toplink
pen.
 

[DeltaRed]

I've noticed that some of those less common 'offbrand' shortline equipment MFGers sometime have poorer quality. 'wrong' holes are common.I have a 'IMCO' blade that the pivot is off,and the bolt holes on the blade are off too.Mispunched/missized holes,I've seen before.
 

[Dave Sherburne, NY]

Check this out
3 pt specs

 

[Ellis Kinney]

Tractor Supply has spacers to go from cat1 to cat2 and also for what you need. Look where the 3 point hitch stuff is located. Ellis
 

[Billy NY]

This rear blade is well made, thick steel all around and the hole in the top link mast is round, I measured it with a caliper. Just seems odd to be a 7/8" top link hole with CAT 2 lift pins. It should be 1" if it was built as a true CAT 2 implement. This blade pivots both on the rear of the beam and the front under the top link mast and I have not seen another MFR that has made one like it. I have seen a few others by the same MFR in this area, but 8' wide, mine is 7' and it can spin 360 while mounted which is great. Like you say, drill it out to 1" then bush down to 3/4". I just wonder why the 7/8". I adapted a Woods DuAl universal mount set of forks for the 3 pt hitch by just adding a removable tubular steel mast, using the CAT 2 3 pt specs Dave Sherburne posted. I'd have to refer to my fabrication sketch, but as laid out, it was perfect, forks tilted exactly where you want them, when raised, it tilts back plenty far enough to retain the load. I'm using the OEM top link, but will change to a hydraulic top link which will improve this attachment.
 

[Billy NY]

TSC is right across the road from me, I searched through all their bushings and the drawers near the nuts and bolts. None fit, though I thought I saw one in their website catalog that would work. The bushing would need have an inside diameter for a 3/4" pin, and O.D. that will fit inside a 7/8" hole. I figured it would be one of the CAT 1 to CAT 2 bushings but none would fit.
 

[Billy NY]

I know the one your talking about, neighbor ran Deere all his life. This one is a Ford/New Holland 4630. They did offer top link ends for both when it was new, which I think is still available aftermarket, but the top link mast hole on the implement is 7/8" so
 

[Billy NY]

I remember you posting that a few years back, saved it somewhere and used it to build from, thanks for re-posting it. The geometry for a CAT 2 worked perfectly on the Woods DuAl forks I adapted for a 3 pt hitch.
 

[SVcummins]

Oh ok I?ve worked on a ford 4630 a couple times when I was first out of school long story short it kicked my butt nice little tractors though
 

[farmerwithmutt]

On the oliver the end on the top link is screwed out and you can put in either cat 1 or cat 2. I wonder if someone hadn't screwed in a different end check at farm stores for replacement ends. Also check Amazon they have bushings and ends I've gotten them and there ok.
 

[495man]

Have a bale spear that way, bought brand new, cat 1 and cat 2 lower pins, top mast has one 7/8" hole... 3/4" pin cat 1 toplink slashes in 7/8" on the cat 1 tractor, have the bush 1" to 3/4" on the cat 2 tractor, same slash in the 7/8" hole.
 

[Leroy]

I don't know why they made them as they did with th 7/8" hole but some companys did. I have a TSC blade that was that way and no it is not from wear as it was that way when new.. The 3 point boom I have is also same way, a standard top link pin just will work its way thru the hole. And where the 7/8" hole is the material is only one quarter inch thick so no way could you put a bushing in there as the top link is not close to being wide enough to hold a bushing in place.