4100 hydraulic problems

[outlander54]

Hi
I have a 1998 4100 HST.
In Nov 2006 I had to replace the charge pump (parts on service bill AM879432, AM879433, AM880337, CH10568), Trans/Hyd oil & filter (LVU800097) after 720hrs. The problem started out as the power steering would be hard to turn and got easier as the tractor ran (warmed up). Then got to a point where it was always hard to turn. The dealer said the high pressure or charge pump was gone.
Well now in Jan 2009 and at 939hrs the problem is surfacing again. I do not believe the pump should go this soon with normal wear. Does anyone know of anything that maybe contributing to these failures? All oils are changed as recommended and always kept up. I have also notice now that while snow plowing you get a hot hydraulic oil smell.
Thanks for any suggestions.

 

[kennyd]

Welcome to TBN

This is the first I have heard of this trouble in the 4xxx series machines.

I am not sure what the charge pump (usually inside the HST) has to do with the steering? The steering has it's own dedicated hydraulic pump

 

[outlander54]

Hi Kenny
From the CD manuals I have it shows there is a hydrostatic pump and a charge pump. On the 4100 the power steering comes from the charge pump, I believe on other models there was a separate pump. Oil from the 4.2gpm charge pump (gear unit) goes through the steering control pressure control valve set at 270psi to the power steering control valve. The variable displacement piston pump (12.6gpm) only feeds the hyrdostatic motor. I can forward pdf pages from the Tech manual if anyone needs them.

 

[sandman2234]

Where did you get the CD for the 4100? I may be getting a burnt one, and am going to need a LOT of HELP!!
David from jax

 

[AKfish]

Where did you get the CD for the 4100? I may be getting a burnt one, and am going to need a LOT of HELP!!
David from jax

Here ya go...!! JOHN DEERE 4100 REPAIR MANUAL - eBay (item 180320098611 end time Jan-21-09 09:46:13 PST)

AKfish

 

[outlander54]

One option is eBay as mentioned.
I ordered mine from the JD web site and had the 4100 Tech Manual, Parts Manual, Loader parts manual , and mower parts manual all put on it.
The files on it are all PDF.

 

[sandman2234]

Thanks for the manual listings, but I need to actually take ownership of the 4100 before I go spending money on a manual. Hopefully I will be able to do that soon, and won't miss the one on ebay.
Thanks, David from jax

 

[Nuru]

One option is eBay as mentioned.
I ordered mine from the JD web site and had the 4100 Tech Manual, Parts Manual, Loader parts manual , and mower parts manual all put on it.
The files on it are all PDF.

I also bought all mine from JD.

 

[VA Rebel]

The power steering on my 4100 is almost gone. It's also a 1998. So I guess the charge pump is it. Did you change it yourself or have it done?

 

[outlander54]

Hi
The unit was replaced by the JD dealer.
There was about $940 in parts and $1080 in labour back in Nov 2006 (plus our 14% tax in Ontario).
If this is my problem again I think I will do the work myself. I am currently reviewing the Tech Manual I have to see what all is required.

 

[outlander54]

Update
I finally had time to drain the oil this weekend. Cleaned the suction screen, it was dirty with small particles and the magnets had a metal sludge around them. Replaced the filter and filled it with new oil. The oil coming out of the rear screen drain was clear. The oil from the two brake drains and the drain by the mid PTO had a white tinge to it. So there was some water there.

The oil was in a heated area so when I started the tractor up everything worked fine. The power steering worked first time. I figured the real test would be the next day after everything got cold over night. Sunday went out to snow plow and the power steering worked right from the start and the plow went up and down nice and smooth. Used it again tonight and everything is still working fine.

The oil had 220hrs on it since the charge pump was replaced two years ago.

 

[jackwarner]

Hi Kenny
From the CD manuals I have it shows there is a hydrostatic pump and a charge pump. On the 4100 the power steering comes from the charge pump, I believe on other models there was a separate pump. Oil from the 4.2gpm charge pump (gear unit) goes through the steering control pressure control valve set at 270psi to the power steering control valve. The variable displacement piston pump (12.6gpm) only feeds the hyrdostatic motor. I can forward pdf pages from the Tech manual if anyone needs them.

If you would be so kind to forward me the pdf of the hydro on my JD 4100, I would appreciate it.
Thanks
Jack
grampy355@gmail.com

 

[beenthere]

jack
Sent outlander54 a pm and it will get to his email that way.. may not catch a hit if he/she doesn't see this thread after 8 years.

:welcome: to TBN

 

[joecdeere]

I sent a PDF to Jack

 

[beenthere]

:thumbsup:
Glad you are on it Joe