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Article Comments
Comments for Tractor Hydraulics
Add to these Comments

Wayland Davis wrote on Monday, May 01, 2000 (PDT):
  • Clear, concise and a great primer for the beginner. Would it be possible to put together a "mini" project that could result in a hands-on learning experience? A hand pumped log splitter or small crane would be within the abilities of most with simple shop tools.
    NEIL MCGILLIVRAY wrote on Tuesday, May 02, 2000 (PDT):
  • VERY INTERESTING I REALY ENJOYED THE ARTICLE
    Ted Dlugosch wrote on Wednesday, May 03, 2000 (PDT):
  • This continues to be an excellent source of good plain useable info. Keep it up.
    Dave Janes wrote on Wednesday, May 03, 2000 (PDT):
  • I really liked the article on Hydraulics. As a beginner of working on them it sure helped to give me a better understanding of how they work. I usually can find something of interest in the newletter each month helping me restore my allis WD
    DaveR wrote on Friday, May 05, 2000 (PDT):
  • Great to finally see some info on hydraulics. This seems to be the one category of information that YT has been missing. Hope to see much more on hydraulics in the future. Thanks much
    Mike OH wrote on Saturday, May 06, 2000 (PDT):
  • Good article covering the basic elements of the hydraulic system. Would be interested in future articles on this topic.
    Bob H in Tenn. wrote on Sunday, May 07, 2000 (PDT):
  • This site is great! Easy to understand & very helpfull! The Companies that sell parts & supplies don't just stop there, they are helpfull after the purchase also! Keep up the great work y'all.
    K. Wheeler wrote on Monday, May 08, 2000 (PDT):
  • I enjoyed your article as I have recently purchased a Ford Model 640. However, I recently discovered that after working the tractor for about an hour the hydraulic/transmission fluid is flowing into the transmission and filling the transmission and for some reason not flowing back into the reservior as it should. I was hoping that someone could give me a cause for this and hoe to correct the problem. I love your website and have found it very informative but can't find anything on the transmission in these tractors. Please feel free to E-mail me with any suggestions at Affordable-Fence@Juno.com Thank You, K. Wheeler
    gary george wrote on Tuesday, May 09, 2000 (PDT):
  • Dear Sir or Madam Could someone please email your Phone number? Thanks Gary
    Dan wrote on Wednesday, May 10, 2000 (PDT):
  • Hi! Obviously you have experience in the hydraulic world. It's amazing how many people, even some mechanics, do not understand even the basics of hydraulic systems. With todays technology these systems are getting very complex. I find some of the most interesting systems are found on excavators , I use that example because you used a backhoe as one of your examples. I teach Heavy equipment technology at a technical college, my areas of instruction are hydraulics/hydrostatics and electrical/electronic systems, just to give you a little background on me. I look forward to future articles on this subject. Some people still seem to think it's just magic, ha! Just one observation about your article. When you give the example of fluid leaving the spool valve and going to a hydraulic cylinder you mention that the "ram" is extended or retracted, actually a ram is a one way cylinder that uses the rod itself as the piston. Many people refer to any hydraulic cylinder as a "ram" but I'm sure you realize this and will address it in future articles. Again, this is a good article and I look forward to future ones. Thanks, Dan
    Tim Wheaton wrote on Wednesday, May 17, 2000 (PDT):
  • I enjoyed your article and found it very informative. The reason I checked it out is I am having difficulty with a J.D. cylinder on a J.D.#8 sickle bar mower.After reading your article and going back and checking out the system ,I am convinced it is the cylinder.If the piston extends slowly and under much strain,even not hooked to the machine, what might be the solution? Thanks, Tim W
    Bill Ohmer wrote on Thursday, May 18, 2000 (PDT):
  • Found this article to bo very helpful, and written in laymen term so even I could understand. Thank you. Looking forward to the next part.
    scott battersby wrote on Sunday, May 21, 2000 (PDT):
  • Your article was great! Your website is also. I can't wait for the next part of hydraulics to come out..
    n.gopalakrishnan wrote on Thursday, August 17, 2000 (PDT):
  • there should have more detailed information especially showing a circuit and explain how it works
    FRANK M. RAUSCHENBERG wrote on Thursday, March 15, 2001 (PST):
  • EXCELLENT
    Paul wrote on Sunday, May 27, 2001 (PDT):
  • My Farmall 560 diesel hydralics don`t seem to be working properly. When I work the 3 point hitch lever, I can`t get it to stop at a desired spot,it either goes the whole way up, or the whole way down, or it doesn`t respond at all, any suggestions as to the problem??
    tim rodes wrote on Monday, May 06, 2002 (PDT):
  • your article on hydraulics, couldn't have came at a better time for me, i am just getting ready to put a touch control unit on my 48 cub. this article is simple and easy to understand, i just hope theres more like them. thanks, tim
    tractordan wrote on Wednesday, July 17, 2002 (PDT):
  • Very interesting article! For a future article, I would like to see how hydraulics work with a 3 point hitch, it seems to me that the valve would have to be different some how.
    michael wrote on Thursday, March 27, 2003 (PST):
  • A great article,just what I was looking for,I am trying to design and build a set of four hydraulic legs to fit to my slide on camper.I anticipate using a commercialy available hi pressure water blaster like the Karcher or Gerni as the pump,a set of four spool valves as directional valves to four stainless steel seamless tube cylinders,nylon pistons with "O" rings will drive the rams and water with a soluble oil additive as the hydraulic fluid,a reservoir of which,to be connected to the inlet side of the pump.A drain/return line will be connected between the discharge side of the pump and the spool valves, the fluid can return to the reservoir via a stop valve.
    gregg wrote on Sunday, March 30, 2003 (PST):
  • Very Informative
    Wayne Petersen wrote on Monday, July 07, 2003 (PDT):
  • looking for a flo-schematic of the hydraulic cylinder and valves unit for a c farmall
    William Johnston wrote on Wednesday, September 10, 2003 (PDT):
  • Wayne peterson was rightm on the money about wanting circuit diagrams. I&T give so little information about hydraulics as to be practically useless. They remind me of the Clymer manuals printed back in the seventies. I have seen real workshop manuals and there is no guess-work to the job you are doing.
    Pat Rivers-Bowerman wrote on Wednesday, June 09, 2004 (PDT):
  • Thanks, Curtis ! I inherited a '52 IH Farmall Super A with the Touch Control hydraulic system - double-acting cylinders. Then I bought an old Henderson Loader with adaptor connector, single-acting cylinders and a spool valve. I have been doing a lot of puzzling over these things. Your article was a real blessing. Am looking forward to "Part B" Kindest Regards, Pat from New Brunswick
    Jack Kohl wrote on Wednesday, June 09, 2004 (PDT):
  • So far so good! Thanks..Jack Kohl
    lee wrote on Wednesday, May 18, 2005 (PDT):
  • Good basic description. diagnostics of any problem should always start @ determining that the basic needs are being supplied/met. this article will help anyone to that point. look forward to seeing the next series.
    necdet alcelik wrote on Sunday, October 23, 2005 (PDT):
  • could you send me about aglicultural machines and troctors for hydrostatic transmission exhaustive information.
    Frank Shields wrote on Saturday, April 22, 2006 (PDT):
  • The hydraulic lift is not working properly. It does not fully lift all the way up. I would appreciate any advise or info about repairing or replacing parts for pump.
    Frank Shields wrote on Saturday, April 22, 2006 (PDT):
  • I have a D 10 Allis Chalmers and the hydraulic lift does not lift completely. I would appreciate any advise or info on repairing or replacing the pump. I have located a pump, but the price is pretty high.
    dobruin wrote on Wednesday, May 24, 2006 (PDT):
  • thank you
    Philscbx wrote on Wednesday, November 15, 2006 (PST):
  • Go to this site for basic science of pumps and their design and function. www.hydraulicspneumatics.com/200/FPE/Pumps/Article/True/6401/Pumps Science will win over any speculation or skewed ideas of how it works when you see it first hand up close. Phil, Mpls Mn
    daniel wrote on Saturday, March 17, 2007 (PDT):
  • hi interesting article.I am trying to find out why when the three point linkage is up raised my tractorruns rough and why when I put the crowd action up to its stop the three point linkage jolts up. thanks Daniel
    colton becker wrote on Monday, January 21, 2008 (PST):
  • is there a way to speed up your hydraulics on a 1975 international harvester, is there a knob to do that, if so where is it, or how do you do it?
    Gilles Perron wrote on Friday, April 04, 2008 (PDT):
  • piece valve hydraulic cockshutt 30 1948
    S. Deepa wrote on Thursday, August 28, 2008 (PDT):
  • the article tells me in a simple way about hydraulics in tractor manufacturing. i would like to know more about this. good one.
    Jim Peck wrote on Wednesday, May 20, 2009 (PDT):
  • I love it.
    des wrote on Saturday, July 11, 2009 (PDT):
  • thank you for this information is there a diagram for a log spliter thanks again des
    Yeo Kai Wei wrote on Wednesday, September 29, 2010 (PDT):
  • Requires a diagram to explain
    Doug (OH) wrote on Sunday, August 07, 2011 (PDT):
  • I'm a hydraulic newbie and this was a really helpful article. When is part II coming out?! I need the 411! Thanks for writing it.
    Garry wrote on Saturday, September 24, 2011 (PDT):
  • To anyone having Hydraulic problems with insufficient lift. If this is a new problem then the answer may be that there is (1)not enough hydraulic oil in the reservoir-top up(2)external oil leaks-repair or replace(3)internal leaks-eg worn hyd ram piston seals-renew(4)dirty/blocked hyd oil filter-replace(5)a worn out hyd pump-rebuild/replace(6)load too heavy for the machine.Hope this info is of some help.Cheers.
    John Driggers wrote on Sunday, August 14, 2016 (PDT):
  • I have small holland 29, and the strangest thing happened to my tractor, it spewed out oil and I cannot find where??? I thought it was om the rear gear box, but a careful look revealed nothing?? mabe a good suggestion would help. John

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