air pressure

[greenmule]

Would like advise from others on how much air pressure to use in 15-19.5 industrial rear tires and while your at it 25-8.50-14 fronts.
Book says 30 rear,,,50 front,period.,,That seems a whole bunch to me but these are 6 ply industrials,,used to running ag's,,,
I am now using 20 in rear and 30 in front,,which still seems like to much,no loader on it,,tires are filled with methinal and water,[put 10 gal of methanal plus about 25 gal of water in each rear,about 280 lbs in each,never hear of methinal for some reason?]ever how you spell that word?.

So what are you ck 25/30/35 owners running? greenmule

 

[greenmule]

[its a ck 30 with industrial tires without loader,,,,,,]

 

[VictorW]

I have a CK30hst with those size R4 tires. For Winter, I run 22lbs. in the rear and 45lbs. in the front. Even without a loader, I wouldn't drop below 40 in the front. I've never spun a tire on the rim and the rears run a little flatter for better traction. For Summer, I keep them at the recommended 30 and 50lbs. I do heavier loader work than just a bucket of snow and also have a bh which really loads the rears. I agree, R4s are a bit different than the R1s I had on a previous tractor.

 

[greenmule]

Well,thats my concern,spinning on rim/popping off etc.But,still seems like what I'm running[now],30 front/20 rear,seems still to high.

Read on kabota forum,,,they seem to be using way less psi than 20,,etc,etc,

Of course this all boils down to traction for me. My rears with the 20 in them,edges,still don't touch concrete,[never checked,maybe edges wouldn't touch if I was a 5 psi?]

Was just wondering what other had been using and having no problems with,maybe save me spinning the rim.

Yeah,if I had a hoe on back and fel on front would probably run 50 in front , back would still be a question for me. I read the post about the guy who had single digit psi[low single digits I believe] and rim spining in tire.Agree that under 10 psi in rears seems to low.

I'll keep with what I've been running now[for now] for last 30 hours or so,,[about 28-30 in front and 18-20 in rears],notice no tire bulge,heaviest thing carried on back is 5 ft tiller,,got weights on front end,plus homemade grill guard,,

 

[greenmule]

Victor,well seems like your the only one who knows how much air they want in their tires,,read on here several who hadn't even checked it,so guess thats not surprising.

 

[VictorW]

I guess I'm a little **** when it comes to all the service on the tractor. I do the same with my truck, wife's car, and all of my toys. I usally check the tire pressure several times a year. I like to keep my toys for a long time without having problems.

When I had R1 tires on a previous tractor, the rears could be run at about 12 pounds which let them flatten a little and get a good bite in the snow. My R4 rear tires are 8 plys and I think they wouldn't sit flat even with only 5 pounds. Mine aren't filled but I still didn't want to spin a tire on the rim. The 22lbs. works good for me but when it starts to get icy, they still don't bite in. A set of two link side spaced chains on the rear turned it into a good snow pushing machine and you don't get all the bouncing as associated with 4 link chains. It pushed so good, that the front tires would slide in a sharper turn. Added a set to the front and it's a tank.

I don't run the front tires that much less than max because they aren't rated that high in loading to begin with. My fronts are 6 plys and are a good bit flatter than the rounded rears.

Good luck figuring what works best for you.

 

[greenmule]

I got a ck30,with industrial,think rears are 6 ply.
Thinking about chains,most its snowed here this year is about an inch,so its hard to get me to spend 4-500 right now,but they wouldn't spoil,and you would have them,,yeah 2 link are the ones to get I'd say,don't think I'd need those v things or whatever they are called,[teeth for extra traction],
Read on here that there is no problem fitting chains to ck30 with r4 tires,,but it looks pretty close to me between inside of tire and sway bar?3 inches at most for mine with a 6 ft blade on it,maybe chains won't come back as far as I'm thinking.
Well I'm keeping about 20 psi in back for now and about 30 in front,thats about what you say you use in winter,like I said,don't have a fel,so believe fronts will be just fine with 30,,back ones with 20,not for sure,but from what I've read,you could even go lower.Asked my dealer,he pretty much didn't want to commit,,but kinda leaned with me on this I guess you'd say,[think that was all he did though,lean],,,

 

[VictorW]

When I was looking for my tractor, I saw both 6ply and 8 ply rear tires. Both are Titan brand but a different model name of R4.

I ordered my chains from Tire Chains by TireChains.com. They are two link spacing made from 3/8 diameter steel links. I didn't get the added V-bar link chains. Mine don't slip and the V-bar would really tear up my cement driveway if I did spin them. The cost was about $325 with $50 in shipping. Each chain weighs about 70lbs. You could go with 4 link spacing, cheaper, but then the ride is really bumpy. I sold my old pair of 4 link to a friend.

I have no clearance problems with tire to fender, lift arm, etc., with the chains installed. And that's with my 6ft. rear blade on. You can order their chain tensioners but I just use 4 rubber bungie straps, 15 inchers pulled tight, on each wheel.

I plowed without chains the first year. It did OK but would always be spinning the tires except for the first few snows when the ground is still warm. If you have a gravel drive, you might be OK. Once the cold sets in, I need the chains to push the snow because it can dump a foot here in a day.

 

[greenmule]

Thanks for the info,I'll have me a set before next winter,and hope I don't need them the rest of this winter,can't never tell about that,it has snowed as much as three ft here at one time,[twice in past 20 years or so],but generally speaking 6-8 inches would be on the bigger side normally.

 

[Highbeam]

I follow the manual and have spent 754 hours on 50 psi up front and 30 in the rear. I even used a black marker to write the pressure figure on the rim since the rears aren't marked.