Snow plow drops with a "Bang"! - John Deere Gator Forums
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post #1 of 20 Old 11-15-2019, 08:06 PM Thread Starter
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Snow plow drops with a "Bang"!

Hi, All -


Recent owner of a nice 2019XUV835 here. It's a real nice rig and I recently got a JD plow setup for it. After some hair-pulling over the assembly instructions and two trips to the local dealer, it's working as designed. "As designed" is a problem. When I raise the plow, it goes fully up as intended. When I try to lower the plow *slowly*, it just drops it like a hot rock - Bang! Ditto on the left/right control - it just goes immediately to the full stop, no control at all.



Is there a way to modulate the motion of the JD hydraulic system to give the owner/driver some control over the motions of the plow? Seriously, reward to someone that can help with this annoyance.



- Rob
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post #2 of 20 Old 11-15-2019, 10:34 PM
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Sounds like you got a hydraulic valve problem. Usually, the bottom backs out and the spring doesn't fully engage the valve. On a backhoe, that means when you move it in one direction, it goes fast and stops with a clunk. Go after the warranty aspect.
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post #3 of 20 Old 11-15-2019, 11:11 PM
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Have you checked the fluid level?

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post #4 of 20 Old 11-16-2019, 02:56 AM
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Firstly yes, warranty

Secondly if all else fails and this really works as it should id put my own regulator in somewhere.
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post #5 of 20 Old 11-16-2019, 08:36 AM Thread Starter
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Captain -

Indeed, it is a hydraulic valve problem, but what exactly is still unknown.

Brad -

Yes, the fluid level was the first thing I checked. There's a nice screw-in shorty dipstick in the pump reservoir.

X -

I am down for putting in my own regulator, but I don't know what regulator to get. I thought this had been thought through already by the JD guys!

- Rob
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post #6 of 20 Old 11-16-2019, 05:40 PM
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I don't have the JD plow but when I had the boss plow on my kubota RTV there was a set screw that you loosen and adjusted for speed of lowing the blade. You probably have one also.

Bill
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post #7 of 20 Old 11-16-2019, 11:04 PM
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Quote:
Originally Posted by Rob4604 View Post
Captain -

Indeed, it is a hydraulic valve problem, but what exactly is still unknown.

Brad -

Yes, the fluid level was the first thing I checked. There's a nice screw-in shorty dipstick in the pump reservoir.

X -

I am down for putting in my own regulator, but I don't know what regulator to get. I thought this had been thought through already by the JD guys! <img src="https://www.gatorforums.net/forum/images/smilies/mad.gif" border="0" alt="" title="Mad" class="inlineimg" />

- Rob
Iam a mechanic but not a hydraulics expert, maybe thats a question for someone else.

I did work on a 4049 front loader once that had a fitting break off on the piston so we sent the piston out to be repaired.

When it came back however the fitting they put on was less restrictive on the inside.
Customer wanted this option instead of a new piston which would be a lot more espensive so i juggled around with some fittings simply to reduce flow to make the pistons on both side flow evenly.

It worked so short story: go to a place that has fittings and regulators and ask them what they can offer and just juggle around a bit.
Maybe you can even press in a little piece of pipe or something to reduce flow
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post #8 of 20 Old 11-17-2019, 01:27 PM Thread Starter
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All -

There isn't much to tweak on the pump. The screws on the front of the pump (one hidden by wiring) seem to slow flow TO the cylinders, up/down, left/right. Neither of the screws control the "down" hydraulic fluid flow. Still looking for some sort of flow throttling.

Anyone have any ideas? Thanks for your wisdom.

- Rob
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post #9 of 20 Old 11-17-2019, 02:00 PM Thread Starter
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Hi, All -

Problem solved. I am posting for those of you also suffering from this ailment. Something my brother, a database administrator told me many years ago, which I have evidently forgotten, and bears repeating here: RTFM! Read the flippin' manual!

As indicated relatively clearly in the manual, turn the indicated screw in until you are happy with the drop speed. Period! Works great!

- Rob
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post #10 of 20 Old 11-17-2019, 02:47 PM
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Great news!! Please share photos of the plow in action when you can.

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post #11 of 20 Old 11-21-2019, 08:02 PM
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I had the same problem . What is sad the the JD dealer doing the walk around said that how it was. he said other people were complaining about the blade dropping fast. After getting it home I started reading the manual and their it was that little screw.
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post #12 of 20 Old 11-22-2019, 12:58 AM
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Quote:
Originally Posted by Krmo View Post
I had the same problem . What is sad the the JD dealer doing the walk around said that how it was. he said other people were complaining about the blade dropping fast. After getting it home I started reading the manual and their it was that little screw.
I understand what youre saying but i have to just speak my mind
We dealer mechanics arent allmighty beings.
Yes there are bad dealerships but it also boils down to this:

Sometimes we dont know everything.
I myself like working on big tractors and not the fiddly things.
I have a colleague that gets a fit when he has to work on anything bigger than a 3xxx let alone a 5xxx
And even then we have so much models that sometimes a machine rolls in for service that even i think bloody hell what is that?
I worked on a 355d for the first time just this week and whent looking for the air filter.
I pulled a box from under a layer of dust with the strangest looking airfilter ive ever seen on a deere.
Looked at my colleague like have you ever seen this sh#t? He replied yeah thats for the 355d.
I wad flabbergasted he even knew that.

I love being told by customers that theres a screw that does x or z so call the dealership and tell them i found this screw and it solved my problems because sometimes we simply do not know of its existence.

Last edited by טים ירושלמי; 11-22-2019 at 01:03 AM.
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post #13 of 20 Old 11-22-2019, 08:56 AM Thread Starter
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X -


No disrespect to any tech or mechanic that works on any kind of JD equipment. You guys have to keep track of So much stuff!


Some disrespect for JD parts though. When I bought the plow controller kit, I correctly hooked everything up, and found there was nowhere to connect the controller plug. The instructions said to plug it in, "right there on the dash, next to where you mounted the controller". Great, except there wasn't anything there at all.



Went to my friends at the local JD dealer. The parts guy didn't help, my sales guy couldn't help. Ultimately, one of the guys said, "you need one of these", giving me a copy from a parts page. It was a pigtail with one connector on one end, three on the other. I profusely thanked him and ordered the piece. Shouldn't this have come as part of the controller kit? Shrugs!


I get the part, and it has instructions: remove the top of the dash, and look right here, there's the connector the pigtail mates with. Well, it wasn't right there, and what was under the top of my dash didn't look anything like the picture in the instructions. Ultimately, I fished the connector out from the bottom of the dash. The connector did indeed make the plow pump run, and this set me off on the "banging plow when lowering" adventure.



All good now, though I haven't quite gotten it up yet to drill the hole in the dash "right next to where the controller mount is", right now it's all hanging below the dash, like so much spaghetti.



- Rob
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post #14 of 20 Old 11-22-2019, 12:51 PM
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Sounds familiair about the parts guy, ours is the same and doesnt know how to screw in a bolt if its life depended on it.
But then again hes sales and not a mechanic

Things change over time with revisions, same as the new power steering unit that needs a connecting harness to work.
Sure some guys got flipped off about that over time haha

Last edited by טים ירושלמי; 11-22-2019 at 12:55 PM.
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post #15 of 20 Old 11-23-2019, 08:47 AM
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First let me apologize. I did not intend to bash any type of mechanic. But after rereading my post it sure sound that way. So I will put it this way and hope its better said. If he had not know one way or the other about the screw he could have said let me ask someone. I am not mad at the dealership. Its just that one person was not familiar with that piece of equipment. But not simply that's the way it is.
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