3520 Turbo Issues

[NYBOB]

I am looking at the 3320 and 3520. I see the difference is the 3520 is a turbo unit. Has there been any issues with the turbo units themselves that I should be wary of? I assume they are covered by the same warranty as the engine itself.

Thanks

 

[KB9UDE]

I have a new 3320 and the dealer was pushing a 3520 on me but for the $1800 price difference I went with the 3320. The turbo is just one more thing to go wrong in my opinion. It would help at high altitudes.

It should be covered by the warranty, same as the rest of the tractor.

I am looking at the 3320 and 3520. I see the difference is the 3520 is a turbo unit. Has there been any issues with the turbo units themselves that I should be wary of? I assume they are covered by the same warranty as the engine itself.

Thanks

 

[jcmseven]

I am unaware of any issues with the turbo unit on these machines. They are quite durable. I have had now two JD 3720's and although I have not put much time on either, I sold my first one to my parents' neighbor and he had put several hundred hours on the machine with no problems. I suppose a dealer could tell you how many PIP memos have been issued, but I personally am unaware of any problems, and I speak with my dealer at least once weekly. I will also say the 3520 is a pretty large step up in power over the 3320, so it would definitely be worth checking out. I would not worry much over the turbo in this Yanmar engine.

John M

 

[JD_Newt]

I’m also looking at the 3320 and 3520. It’s hard to justify $1800 for an extra 5HP. In the JD Buying/Pricing there is a thread by ‘Tust’ that quotes a dealer price of $21600 for a 3520 w/ehydro,r4s,mid pto,telescoping links,rear work light,3rd scv,and motion match. Also a 300cx heavy duty 61" bucket and tooth bar. Looks like he is getting around 84% of list price. If I could get a deal like that, I would go with a 3520.

Hope MYBOB and I hear from other 3320 and 3520 owners.

 

[GATOR445]

I am looking at the 3320 and 3520. I see the difference is the 3520 is a turbo unit. Has there been any issues with the turbo units themselves that I should be wary of? I assume they are covered by the same warranty as the engine itself.

Thanks

Hello

There have been no problems with the turbo's. Just need to let them cool for a few min's at idle just like you would any turbo charged engine.

 

[orlo]

Hi:

I've mentioned this before but it's worth mentioning again. I have a 3320 (Considered the 3520 and 3720 but didn't need the extra HP and if I did I would have jumped to the 4000 series - Someday . One thing people don't notice is that the 3320 has larger block (displacement - it has a larger bore) than the 3120, 3520, or 3720. The 3120, 3520, and 3720 are 1.5 liters, the 3320 is 1.64. I'd prefer a bigger 'naturally aspirated' engine to a smaller turbocharged one if the hp difference is small. If you were going to the 3720 where you are getting almost 12 more hp I'd say it's worth it, but for 4.5 more hp I don't think the complexity of the turbo, etc. is worth it. The turbo would give you a little more torque down low compared to a non-turbo engine of the same displacement (3120) but the 3320 will have more low end torque (than the 3120) due to it's larger displacement. I'm sure the turbo is more but probably not as much as you think.

As to why Deere did this strange engine combo I'm not sure.

 

[BleedGreen]

I'd prefer a bigger 'naturally aspirated' engine to a smaller turbocharged one if the hp difference is small. If you were going to the 3720 where you are getting almost 12 more hp I'd say it's worth it, but for 4.5 more hp I don't think the complexity of the turbo, etc. is worth it.

I absolutely agree - except in one scenario... Higher altitudes. If you are above 5000 ft, the turbocharger will make a huge difference.

I checked out the specs just now (I don't usually look at the torque ratings on the smaller tractors) and here is what I found:
Engine Torque @ Rated Speed, ft. / lb.
3120 = 55.6 @ 2600 rpm (1.884 ft/lb per HP)
3320 = 61.6 @ 2600 rpm (1.895 ft/lb per HP)
3520 = 71.1 @ 2600 rpm (1.921 ft/lb per HP)
3720 = 84.3 @ 2600 rpm (1.915 ft/lb per HP)

What do you all think...???

 

[dirtworksequip]

Having problems with a turbo would be my least concern. I've owned 4 turbo diesel vehicles over a 20 year period with a combined total mileage of 750,000 miles and never had a problem with a turbo. I've also own several pieces of Cat Equipment with turbo's over the last 22 years. NO turbo problems. I now own a JD 3520 and expect the turbo to give me no problems over its lifetime. Turbo problems are just nothing to worry about.

 

[papafoxtrot]

Engine Torque @ Rated Speed, ft. / lb.
3120 = 55.6 @ 2600 rpm (1.884 ft/lb per HP)
3320 = 61.6 @ 2600 rpm (1.895 ft/lb per HP)
3520 = 71.1 @ 2600 rpm (1.921 ft/lb per HP)
3720 = 84.3 @ 2600 rpm (1.915 ft/lb per HP)

What do you all think...???

It was the torque jump that was the decision factor for me when I opted for the 3520 over the 3320. HP is nice but it's torque that gets the work done. I never looked at the t/HP figures so it's interesting that the 3720 has a lower torque/HP figure than it's smaller 3520 sibling.

 

[NYBOB]

Maybe it would help if I explained my situation.

I currently have a 2003 New Holland TC33D, 914A MMM and a 7308 FEL with an ATI Skid Steer QA. I mow approximately 3/4 of an acre with the deck at 2" and I mow a 5 acre field with the deck up to about 5". I also maintain a 100' stone driveway and plow it with a Curtis QA plow. I bought my FEL last year and since I have had it, I find myself not liking the fact that I take the mower off much more often. I am usually by myself and it's just difficult to do alone. I know, I could leave it on when I use the FEL, but it is difficult going over rocks and such with it on.

So with that said, I went to my NH dealer and asked if I could trade my 914A which is in like new shape. He told me no, they are not worth anything to him. I paid $2100 new 4 years ago and was stunned.

At the same time I have been bothered by a bad hip and the treadle pedal which was fine when I bought it, causes an issue today.

I then started to look at new tractors. Looked at the NH TC34DA and it has the same treadle pedal. I looked at the TC40DA today and it just seems to big for my application. I have looked at the Kubota 3240 and the pedal arrangement just didn't work for me. It was a great running tractor though.

I still have to look at the Kioti's...supposedly the new DKs have a 2 pedal HST system.

Which brings me to John Deere. I like the Ehydro and the layout, one of the things holding me back is the seat. I need to make sure I can use the air seat upgrade to keep me up higher, the hip likes to be above the knees. I have received answers on this through another thread. I received some great replies.

The last item is the one we are discussing now. Should I go with the 3320 or the 3520. I am going to load the tires, and put on rear weight for ballast. When I did this to my NH, it slowed it down when I was plowing and mowing. You could feel the difference, especially plowing in 2nd range.

Whew, there you have it. I would appreciate any responses/suggestions now that you have the entire scoop.

Thanks
Bob