John Deere 4100 HST won t move: John Deere Review  -- John Deere Tractors Discussion Forum and Review John Deere 4100 HST won t move: John Deere Review -- John Deere Tractors Discussion Forum

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 12-18-2007, 11:33 Post: 149398
acerguy



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 John Deere 4100 HST won't move

Howdy. I've had my 4100 for about 4 years and it's been a great machine. Has about 660 hours on it...I've put on less than 100 of them. Lately I had been noticing that it seemed to be lacking power...having difficulty pushing the snow around. I also noticed that it was getting harder and harder to steer. Then this past weeked it got worse and worse until it basically quit moving. I couldn't even back it into the shed. The engine is running fine, just that the HST makes a lot of noise and barely moving the vehicle. I thought maybe it was drastically low on Hydro fluid but I checked yesterday and it was still in the "XXX" zone on the dip stick. I'll top it off tonight to see if that helps but I'm worried that this may be a more $$$$$ problem! Any ideas? Thanks!






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 12-18-2007, 12:08 Post: 149399
candoarms



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 John Deere 4100 HST won't move

Acerguy,

You didn't mention anything about the last time you checked or changed your hydraulic filters.

Your fluid level is very important, but plugged filters and sump screens can often cause the same problems.

I would suggest a complete service on your hydraulic system. Depending upon when you last changed your hydraulic fluid, I would also consider doing that.

Joel






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 12-18-2007, 12:26 Post: 149400
acerguy



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 John Deere 4100 HST won't move

Thanks for the lightening quick reply! Smile Yeah, I have wondered if it could be a plugged filter. To be honest, I haven't changed it as it was done just before I bought it. I'm sure it's due. I'll give that a try and report back. Thanks!

Boy, I could use a heated garage right about now....






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 12-18-2007, 13:31 Post: 149401
candoarms



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 John Deere 4100 HST won't move

Acerguy,

You mentioned something that could be a part of the problem.

It's cold this time of year. If you had any moisture in your hydraulic fluid, it's possible that the water has frozen and consequently turned to ice crystals, which will quickly plug up your hydraulic pump's filter.

Changing the filter might work for a short amount of time. If you find that this problem shows up again in the near future, you'll know that it's probably time to completely drain and replace your hydraulic fluid.

If you have any problems, please check back with us. We have a good number of helpful people who might have other suggestions for you.

Joel






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 12-18-2007, 15:12 Post: 149402
earthwrks

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 John Deere 4100 HST won't move

Are the stering and hydro systems on the same circuit? Generally on CUTs I have found they are a fully separate systems.






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 12-18-2007, 21:10 Post: 149411
candoarms



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 John Deere 4100 HST won't move

Earthwrks,

There are two separate hydraulic circuits involved here, but there are elements common to both.

There is only one hydraulic fluid reservoir, though most tractors have several drain points. All drain plugs must be removed when draining the fluid.

The hydraulic pump is common to both circuits (drive and steering), as is the hydraulic filter.

When all hydraulics seem to fail, it's a sure sign that some component common to both circuits is at fault. Most commonly this will be the filter, pump, or fluid level.....or even a combination of all three.

Joel






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 12-18-2007, 22:09 Post: 149412
acerguy



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 John Deere 4100 HST won't move

Well, I stopped by the local part supply and will have the hydro filter tomorrow. Unfortunately, they don't have the exact rating of hydro oil that JD calls for in the temps I'm dealing with (cold!) so I may have to make a trip to the dealer anyhow. I figure I'll just go ahead and do a complete drain of the system. You're right about multiple drain points; at least 4...PLUS the filter! I won't get to it until this weekend but will be sure to report back. Again, thanks for all the responses. By the way, thanks to JD for putting the manual on line...yes, I have a paper copy but this was even better.






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 12-18-2007, 22:54 Post: 149414
candoarms



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 John Deere 4100 HST won't move

Acerguy,

You'll also want to check the screen on your pump intake (sump screen), which is located in the hydraulic fluid reservoir. Your manual should point this out.

If that screen is plugged up with debris, it will prevent fluid from getting to your pump, causing cavitation, noise, and poor performance. This can also destroy your pump.

It is generally not necessary to replace this screen. It can be cleaned off with diesel fuel, or kerosene, and then reinserted.

I'm all but certain that these services will cure your problem.

Joel






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 12-19-2007, 09:36 Post: 149420
acerguy



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 John Deere 4100 HST won't move

That's what I'm hoping for...that the screen/filter is clogged....not that my hydro pump is destroyed!






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 12-19-2007, 10:58 Post: 149421
candoarms



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 John Deere 4100 HST won't move

Acerguy,

I don't know why my previous message didn't post......so I'll try again.

Please subscribe to Brendan Casey's free newsletter, Insider Secrets to Hydraulics. It's free. No strings attached.

Joel






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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