3720 tested

   / 3720 tested #1  

jcmseven

Veteran Member
Joined
Dec 19, 2004
Messages
2,314
Location
western NC
Tractor
JD 2320; 4520
Fellow posters,

I am now back from my dealer's. Since Sunday is about the only day I have off of late, my dealer kindly agreed to meet me to let me drop off my 4310 for the new 3720 I am considering. I did not consider very long. Granted, what I am about to say is not quite fair, but I was amazed at the difference in power between the two machines. Since my dealer is about two hour's drive from here, the terrain is very different. There are not nearly so many big, long hills there, so we took the two tractors to a 500 or so foot climb at about 10% grade to compare. The 4310 I own had a 300cx loader and loaded tires, while the 3720 had loaded tires, but no loader or attachments. My 4310 climbed the grade fairly easily in 'B' range, but struggled in "C" range to maintain speed. With Loadmatch on, the 4310 could climb the hill, but slowed substantially to do so (with no load). The 3720 could climb the hill easily in all ranges, and would accelerate up the climb even in "c" range. It also did not bog much, even when becoming aggressive with the hydro pedal without loadmatch activated. It seems my initial thoughts may have some merit; that is, that the 3720 should be able to accomplish tasks in the "b" range that may have previously required "a" range with the current mid frames. The tractor SEEMS smaller than the current mid frames, but I think this was a function of the Galaxy tires, which appear a good bit smaller than comparable Titan's. The "siped" tread is a nice and probably very-useful feature. I was very impressed with the packaging of the intercooler and tiny turbo which sits on the left side of the motor. The access will be easier with the one piece hood, and I think many of the changes seem to make sense. I am getting the 3720 for these reasons. Two questions: first, since it is a two hour drive to my dealer, how much would be a fair reimbursement to him to deliver the tractor, and would it be out of line to ask him to drive the 130 mile one way trip? Second, would it be helpful to the fellow posters if I reviewed this machine when it comes in for comparison to the 4310?

John M
 
   / 3720 tested #2  
Second question first, I think it would be very helpful if you reviewed the new addition. You have a situation where you may have maxed out the 4310 and can do a "side by side" comparison about the easch tractor's capabilites.
As far as the second question, that's an interesting situation. It's four hours of somebodies time but depending on the deal- you got with your trade-in, it may already be accounted for. He may have added it in somehow.
 
   / 3720 tested #3  
Thats the way to do it, side by side. An evaluation would be great after you have had it long enough to put it thru a good test. On delivery I wpold just talk to the dealer about it and if neede meet him 1/2 way on the money. He may want to bring it to you at no charge, my dealer insist on it and woul not consider that distance long at all. Good luck and keep us posted.
 
   / 3720 tested #4  
Did you have a chance to compare the "delay" in the pedal response between the two tractors? My uderstanding is it can be set to no delay similar to the old non-eHydro models.
 
   / 3720 tested #5  
Coming off of a good days playing with my new 3720, I have a few things to report. I'll start with the problems (albeit minor) encountered:

Problems:

1) Throttle friction will not hold RPM steady. It seems to have good friction, but any jarring, bouncing backs it off. Put it to max, and wag the bucket at full dump to shake it clean and it will back off. Scrape deep when plowing and same thing. Maybe it will get better if there is a painted surface involved, otherwise it needs to be tightened.

2) Female hyd coupler on loader control leaks when the uncoupled. The collar also resists locking when coupling. Just needs a new coupler, no big deal here.

3) Skid steer coupler on loader has released from the over center position on the RH side 2 or 3 times. The lever pushes down very easily whereas the true skid steer needs to be stepped down.


Plusses (based on my experience operating 4310 Ehydro, and 4710 PRT)

1) Power is EXCELLENT! I plowed a 5" snowfall on my dad's 800'+ drive in C range with the Load Match off, at about 10-12mph! This did net significant RPM drop to about 2,000 RPM, but created the boost (load) that I wanted to help with break in. I also plowed paths across lawns in B range and it never dropped. Plowing in the woods trails, the turning brakes hardly phased the engine RPM but was noticeable with the other machines.

2) Motion match: MUCH more responsive. Using the default short roll out, the tractor stops nicely, AND responds to the pedal much better. The 4310 showed weakness here. When stuck, it is quite difficult to get a good "rock" going. I did not try this with my 3720 as I haven't gotten stuck yet. The manual is a bit confusing as to setting the motion match, but as I understand, the default short rollout is 5 and I can get even more aggressive than that.

3) Quiet. I'd have to have the machines side by side for a decisive comparison, but in my experience, a turbocharged engine is much quieter, especially under load.

4) Hand parking brake. While the destructions say to tie the brake pedals together, and depress while activating, it does well on it's own. The only quirk that I have had is the release button can give some grief.

5) Traction: While I have the larger, and loaded tires (828# total calculated) it definitely seems to get around better empty than the 4310 did with 700# on the 3 pt or large box blade at 628#, and the 4710 with a big blade on the rear. Snow conditions have varied from week to week so this may not be a direct comparison.


While many comparisons are not direct, I feel that I have pretty decent judgement as to the capabilities.
 
   / 3720 tested #6  
<font color="green"> 3) Quiet. I'd have to have the machines side by side for a decisive comparison, but in my experience, a turbocharged engine is much quieter, especially under load </font>

All of the TNV's should be significantly quieter than the TNE's, The whole engine design was tweaked for quieter operation.
 
   / 3720 tested #7  
As an aside, what is your setup for plowing snow? Thanks.
 
   / 3720 tested #8  
For now, JD Worksite Pro 66" Foundry bucket. Largercapacity than the 73" tractor bucket, and MUCH heavier/better built.

I plan to have a plow in the future. Ultimately, a Boss Power Vee like on a pickup...
 
   / 3720 tested #9  
Here it is on the trailer, ready to attack the snow...
 

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