Questions for owners of 3x20 and 4x20 series

[radman1]

I had a cabbed 3720 with 300cx, r4 tires and no rear ballast. Now havecabbed 4520 with 400cx FEL, r1 tires and 440 lbs of weights on rear. Turned up hydraulic psi to 2750 on both.

3720 won't lift 1 ton with pallet forks. 4720 can lift 1 ton but still on the edge and needs more ballast. The rear end for both needs ballast with either loader for heavy work. My cab weighs 600 lbs. Not nearly enough weight for either tractor. If you don't have a cab, it will be even worse.

Always felt the 3720 felt tippy with tires at 59". 4520 feels vastly more stable at 70" with and rear weights. The 4520 sits a little higher be seems 30-40% more stable on slopes.

Both tractors have more power than traction for FEL tasks or for most tasks. The power of the 4520 much more noticeable at higher speeds.

Both FELs can easily lift a full load or dirt, rock or sand. I had 66" on 3720 and 72" on 4520.

I don't use load match. It varies the tractor speed too much, with even minor changes in the work load. The automotive style cruise is the definitely worth the upgrade. Once you set the roll out, you will probably never change it. I leave mine on the factory default.

Get the skid steer carrier for the FEL when you buy. Opens up a vast world of cheaper attachments use for skid steers at lower price than JD attachments.

The clearance of the 4520 is much better than the 3720. Important if muddy or obstacles are an issue.

 

[RoyJackson]

Tom:
6) I wanted to run a 84' rear finish mower which the 37 would not handle due to HP and weight. the 47 has no problem - so faster ground speed and wider deck equals more done faster.

That really surprises me. I run an 84" RFM behind my Deere 4400 (35 Engine HP, 30 PTO HP) with no problems...this includes lifting the mower.
That 3720 has a bit more horsepower (and torque, I assume) then my 4400.

 

[AKfish]

That really surprises me. I run an 84" RFM behind my Deere 4400 (35 Engine HP, 30 PTO HP) with no problems...this includes lifting the mower.
That 3720 has a bit more horsepower (and torque, I assume) then my 4400.

The 4400 tractor looks bigger than the 3720. Longer, larger tires. If I had to bet.... I'd bet it's a heavier machine.

Less Hp but bigger engine cu.in.-wise; 4 cylinder vs 3 cylinder. Might have a flatter torque curve than the 35-3720 and not so quick to bog down.

Some users have commented that once you "fall-off" the turbo with the 3000 series, things can slow down quickly!

AKfish

Checked @ Tractordata.com - they're both 3-cylinder Yanmars. Around 10 cu.in. difference, though in favor of the 4400.

 

[Red Horse]

Hi All,

I'm researching my next purchase. I've decided to go into the 30+HP/medium to large chassis size. I would like to ask the owners of the 3x20 and 4x20 series a few questions. Please let me know what model you have and if it's open or cab as well.

I have an open 3320, hydro, 300CX, loaded turfs and a 550 lb concrete weight block-plus chains in winter

1: How stable is the tractor traversing inclined ground and also while working with the CX loader with heavy loads? (please let me know if yours is cab or open and if your tires are loaded) Stable IMO-use your head- CG goes up drastically as loader is raised- I've seen my share of idiots running TLB's on the road with the bucket raised so they are looking UNDER the bucket- they should be arrested!

2: Does the tractor have good traction when doing loader work or does it spin the tires when pushing into or pulling away? I'll be outfitting with loaded R4's
If its wet material, Turf's tend to clog and you get more wheel spin-by and large not an issue-I'd say great risk of stalling rather than spinning wheels

3: Have you found the CX loader to be lacking and not have enough power either when working with 72" HD bucket with dense material like stone dust or with pallet forks? My CX has a 72" HD-and I work a lot using asphalt milling or "Process/graded base" (3/4"crushed stone mixed with dust)-no issue- and 3320 is non turbo.

4: Will the 300cx loader lift a 1 ton pallet off a 4x4 PU bed or is it beyond its upper limit? How is the 400cx loader at lifting 1 ton on pallet forks?

Never tried-but doubt it-and others have confirmed it won't

5: How is E-Hydro upgrade in the real world? Do you find the rollout, load match and cruse control switches usefull or is it all hype fron the media people?

Don't have load match and don't use cruise
6: If you have the front snow blower on the 3x20, how is the performance in dense snow? How easy is the change over from loader to blower?

7: What if anything would you change if you could about the tractor?

8: Back to the loader, does the loader work well with the chassis, either 3x20/300CX or 4x20/400CX or does it have a tendency to twist the tractor up on 3 wheels from time to time?

Yes it will-from time to time with a full bucket of stone- common sense must prevail

Thanks in advance

Tom

All in all, a great machine. I'm in the woods a lot too and the 72" bucket is at times a handicap getting around tight grtowth (I keep saying I'm going to make a "skidder blade" but between the good turn radius and using individual braking it gets around very well. My ego says I'd love a 4x20 but my bank account and common sense says this works well for me.

 

[Spudland_Dave]

Hi All,

I'm researching my next purchase. I've decided to go into the 30+HP/medium to large chassis size. I would like to ask the owners of the 3x20 and 4x20 series a few questions. Please let me know what model you have and if it's open or cab as well.

I've got a 3520 Cab, 300cx, Larger R4's,

1: How stable is the tractor traversing inclined ground and also while working with the CX loader with heavy loads? (please let me know if yours is cab or open and if your tires are loaded)

My ground is fairly level so I cant honestly answer that question...No loaded tires, I've got 110 lbs of iron (2-55's) in each rim.

2: Does the tractor have good traction when doing loader work or does it spin the tires when pushing into or pulling away? I'll be outfitting with loaded R4's

It does have good traction, enough that I've never mentally complained about it.

3: Have you found the CX loader to be lacking and not have enough power either when working with 72" HD bucket with dense material like stone dust or with pallet forks?

I've got the Skid Steer QA with a 60" Foundry Bucket..Cant answer your question on the 72" but, I'd say its plenty powerful, The FEL has suprised me in its power.

4: Will the 300cx loader lift a 1 ton pallet off a 4x4 PU bed or is it beyond its upper limit? How is the 400cx loader at lifting 1 ton on pallet forks?

Dunno about the 300cx, I've never tried it, but I'd certianly not be afraid TO try it...I'd suspect its definetly no problem for the 400cx.

5: How is E-Hydro upgrade in the real world? Do you find the rollout, load match and cruse control switches usefull or is it all hype fron the media people?

I Dont have the upgrade..I was gonna get it but after reading some comments about it, I dont think I will..I wanted the "Cruise control" feature, and from what I've read its not a true speed control, in other words, even if you lock it in at lets say 3.2mph, it may not STAY 3.2 MPH...basically its as if you keep your foot perfectly still on the direction pedal...in some

6: If you have the front snow blower on the 3x20, how is the performance in dense snow? How easy is the change over from loader to blower?

My comments/feelings about the front blower currently available are well documented here.

7: What if anything would you change if you could about the tractor?

More hydraulic circuits available out back...yeah I know the diverter is an option, but I'm not a big fan of it.

8: Back to the loader, does the loader work well with the chassis, either 3x20/300CX or 4x20/400CX or does it have a tendency to twist the tractor up on 3 wheels from time to time?

I dont notice any problems, overall its a nice, well balanced package.

 

[radman1]

My 3720 had plenty of hp for a 84" rear discharge rhino mower. I was going in reverse in heavy grass. It plugged up the rear discharge before I knew what happened. Noticed smoke blowing by the cab of the tractor. Was smoking the belt and stopped the blades. Didn't seem to have any effect on the tractor. The mower will cut grass poorly in tall grass long before it would run out of power. The mower/blades were the limiting factor and not the tractor power.

Hit a buried metal gate when tilling once. Slipped the clutch on the tiller. Engine did slow down a bit. I have done lots of hard tilling and never had the clutch slip but that one time.

 

[Cidertom]

My experience:
4520 open station, power reverser. 400CX, loaded rear R4 tires.
I can dead pick a ton pallet off the ground and put it in the truck. Have to have the backhoe on it for counter weight. About 1200 is all without the counter weight. I have picked 2700 lb concrete culverts with it. It required the backhoe, extending the dipper arm and filling the BH bucket with lead bricks. I wouldn't want to try it every day though. The book calls for loaded tires, ballast box with extension and wheel weights for max lift using the 400cx.

I use a 72" 4in1 bucket all the time and have no issues with power. Depending on what exactly you load, you may experience some of my flustration with the roll back angle on the loader. Tractor loses traction before it loses power. I have a set of skidder chains for the rear tires for mud work.

 

[Nuru]

That really surprises me. I run an 84" RFM behind my Deere 4400 (35 Engine HP, 30 PTO HP) with no problems...this includes lifting the mower.
That 3720 has a bit more horsepower (and torque, I assume) then my 4400.

Yeah, I would be a bit surprised too as someone on this forum actually ran 3520 with a 90" RFM and did not seem to have any major issues even in 7 - 10" DRY grass.

 

[Johndeere3720]

With my dad's 3720 I have found it very tippy on hills. When ever I mow I have to go straight up and down the hill. The R4's are very good with load capacity and hold up well. We run an MX6 mower on the 3720 in thick grass and it runs it pretty good, although if you hit something and the mower slows down a bit, the tractor will shake for a while as the MX6 gains speed again. The 300x will not lift a ton of pellets out of my Dad's truck but it will lift 2000 pounds of natural stone just high enough off the ground to move but when it is not ballasted it will not. The cruise control is nice but we don't have the feature where you can press a button to feather a speed change so the stop is rather abrupt. With the load match, from my experience the load match has no effect in C range but it is better in B range. Over all, it is a great tractor, with proper ballast and equipment, it will do most everything.