3pt measurement standards???

[gmason]

I'm a little courious if anyone knows if there's any standard for tractors 3pt lower arm distance clearance from the rear wheels? I guess this does have something to do with the size tires that are on the model tractor, but the most important number really is "if I have implement A, what is the distance at the pins from the wheels" What is the center of the lower arm ball from the outer most of the real wheel?

My old b2400 had good clearance from the rear wheels for my finish mower, but now, my new tc35d only lets me raise the mower a few inches off the ground before it gets into the tires. I'm going to have to weld some extensions onto the mower bracket and add some new pins.

I don't see any specs on the clearence from the rear tires for the 3pt lower arms in the OM.

just wondering?
gary

 

[DaveM]

Gary- Please excuse me if this isn't relevant to you situation but I'm a newbie with tractors that would like to give back something useful to TBN. I just got a 5' rotary cutter for my Kubota B2710. It arrived with the mounting pins pointed to the outside and my lower arms would not spread enough to get over them. If they could have spread enough I suspect they too would have had a tire clearance issue. The problem was easily resolved though by the delivery guy. He simply reversed the pins so they pointed inward. Not sure if this is a common "fix" but I now have plenty of space between the lower arms and my tires.

<font color=blue>I don't see any specs on the clearence from the rear tires for the 3pt lower arms in the OM. <font color=blue>

<font color=black>I also don't remember seeing this spec. in the 2710/2910 manual.

Dave<font color=black>

 

[Bird]

Dave, I'm curious. What make and model 5' rotary cutter do you have? And how wide is the frame the pins are on? I have a Howse 5' rotary cutter, a Howse 5' box blade, and a Bush Hog 5' finish mower, all with the pins facing out and have no problem at all spreading the arms to hook any of them up.

Dave, right after I posted this, I read your next message and see you have an SQ600. Now I'm more confused than ever. The lower arms on the B2710 should spread easily to go on the pins with them facing out; however, it doesn't hurt anything to have them facing in.

Bird<P ID="edit"><FONT SIZE=-1>Edited by Bird on 04/16/01 04:18 PM (server time).</FONT></P>

 

[DaveM]

Bird- I'm not sure either about the spacing. Two minutes after the guy pulled in with the cutter my father drove in from CO. This was his first visit to our place and in all the excitement I sort of lost some of the details /w3tcompact/icons/smile.gif. I just asked the delivery guy if he could show me how to mount either of the implements and he chose to use the SQ600, presumably because it's setup is a bit more complicated than the finish mower. He quickly decided the best way to deal with it was to reverse the pins. He didn't have the correct size wrench so I loaned him my 12" cresent. I haven't removed the cutter yet as I still need to do more cutting. Now I'm wondering if it was really necessary. I'll take some measurments tonight. Might even remove the cutter to get some practice!

Dave

 

[Anonymous Poster]

Gary,

Where is your clearance problem... does the "front of your mower" hit the back of the rear tires as you raise the 3-Point hitch or the 3-Point hitch "lift arms" hit the tires on the inside edges?

If it's the "front of mower" clearance, you normally move the "top link pin" to another position on the "tractor" side...Most compacts have two positions, most utility tractors over 40 hp have 3 positions. Don't forget your "check chains" or "sway arms" whatever you may have... adjust them for the "up" position.

If the "lift arms" are hitting the inside edges of the tires, either reposition the "lift pins" on the implement to the "inside", or you have your rear axle tires set "in" too far and will have to expand the rear wheels thread width accordingly.

A category I hitch is category I is category I... ASAE standard is 26" width between lower lift pins on the inside edge of pins...

 

[JohnMiller3]

Re: 3-Point ASAE Standards

{from the Web}

Standard specifications set by the American Society of Agricultural Engineers

Definitions CATEGORIES 0,1,2,3 and 4 are used to classify tractors by drawbar horsepower. The table below gives dimensions and the horsepower ratings that are associated with these categories.

Maximum Drawbar Horsepower -TopLink Pin Diameter -Draw Pin Diameter -Lift Arm Spacing
Cat. 0- up to 20 5/8" 5/8" 20"
Cat 1- up to 45 3/4" 7/8" 26"
Cat 2- 40 to 100 1" 1 1/8" 32"
Cat 3- 80 to 225 1-1/4" 1-7/16" 38"
Cat 4- 180 to 400 1 3/4" 2" 46 "

 

[RobS]

Re: 3-Point ASAE Standards

Now THERE'S a post for the FAQ section if ever there was one. Thanks John /w3tcompact/icons/smile.gif

 

[DaveM]

Bird & maybe Gary too- When I got home last night I disconnected the top and lower links to see more clearly why my hitch pins were changed to the inward orientation. I think it's necessary in my situation due to the R4 tires. I did not reverse the pins but by eye-balling-it it looks like the lower links would need to be spread 1/4"-1/2" more than they can currently move before hitting the tires. It's so close that one could probably connect one side then man handle the cutter to get enough clearance for the other side. I'm still waiting on wheel spacers so I'll have the tire/fender clearance to use tire chains. My dealer claims spacers are needed on the 2710/2910 only when R4 tires are mounted. I don't know how thick these spacers will be but I bet they will be wide enough that I could reverse the pins back to facing outward! BTW, the PTO driveline did not need to be shortened and the position control and top link are near the middle of their respective ranges when the cutter is in the working position.

John- Excellent graphic! Thanks for posting it!

Dave

 

[gmason]

Re: 3-Point ASAE Standards

Thanks JM3, great diagram, but my problem is not on the outside of the lower arms hitting the tires, it's the front of the mower itself. With my r4's the mower resting on the ground has 4-5" to the tires, but as the mower is raised, it raises the mower mostly vertically, to a piont where the radius of the tire is max'ed in relation to the length of the whole tractor. IK picked-up some 1/2" bar stock yesterday and some extra pins.

I've turned my pins inward on a few implement also for convience. It's a lot eaisier to spread the lower arms apart than to try and keep them apart when trying to attach the the implement. I haven't seen any difference in using the tool with the pins turned inward.
gary

 

[Bird]

OK, Dave, so the problem is not that the lower links won't swing out far enough; it's that they hit the tires. I'm a bit surprised, but of course, I'm running R1 instead of R4 tires, and that does make some difference.

Bird