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Subject: Hydraulic lift control lever problem?

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Dead Eye Dave    Posted 08-14-2017 at 18:34:13 [URL] [DELETE]        [Reply] [No Email]  
  • Hydraulic lift control lever problem?
  • Today I spent some time bush hogging and then switched to my spring tooth cultivator. The longer I worked I noticed the movement of the hydraulic lift control lever becoming very stiff. Both the upward and downward motions had to be forced. The hydraulics still worked as they should. Ideas??? Dave

    HCooke    Posted 08-15-2017 at 09:05:51 [URL] [DELETE]        [Reply] [Email]  
  • Re: Hydraulic lift control lever problem?
  • Try reducing the tension on the friction disk. If that doesn't help you may have to remove the top cover and inspect the linkage.

    Jim Hay    Posted 08-14-2017 at 19:24:43 [URL] [DELETE]        [Reply] [Email]  
  • Re: Hydraulic lift control lever problem?
  • My 51 had the same problem recently. After taking cover off I found that the shaft that the handle attaches to and the bushings that holds the shaft were almost frozen together with rust. I don't see anyway that you can lube it except by taking it apart. These are part numbers 9N517, (shaft), and 8N515, (quadrant). Mine had to come apart anyway to replace the piston and cylinder plus the cam follower pin. Maybe yours got stiffer as you went because it was warming up.

    36 coupe    Posted 08-17-2017 at 07:16:31 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • It may be possible to prove grease fittings on the outside of the cover.My 640 would freeze up in winter.Took a hair dryer to free up the shaft.I have not had a top cover off an 8N for 5 years but think grease fittings would work.The lever is die cast and will stick to the shaft.I have had to use a small puller to get the hub off when replacing friction discs.The hub is a 30 buck part if you break it.A torch will melt it.

    Jim Hay    Posted 08-17-2017 at 12:07:07 [URL] [DELETE]        [Reply] [Email]  
  • Re: Hydraulic lift control lever problem?
  • Grease fittings are a possibility. Just have to make sure grease or oil gets to the end of shaft that is towards middle of cover. That was where mine was binding up with rust. I'm wondering if maybe every year or so it would help to take inspection plate off that has the dip stick and spray lube up under the cover to coat the cam and follower plus all the levers and springs. Mine was pretty much bone dry when I took it apart, not a hint of grease on cam. I'll use anti-seize when putting hub back on.

    DED    Posted 08-14-2017 at 19:02:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • I should also mention my tractor is a 1952 Ford 8N. I changed the hydraulic/transmission/differential oil this season. Dave

    JMOR    Posted 08-14-2017 at 21:11:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • The parts in question are not lubricated by the hydraulic fluid (or any other lube for that matter).

    DED    Posted 08-15-2017 at 04:58:59 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • Thanks guys for the information. I am assuming that lubricating must be done from the inside? It seems odd to me that, if it was a lubrication problem, that it would change as I worked the tractor. Dave

    JMOR    Posted 08-15-2017 at 10:59:39 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • If it sits out in the weather, it likely has rust between the control lever shaft and the quadrant tube that the shaft is inside.

    DED    Posted 08-15-2017 at 16:57:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Hydraulic lift control lever problem?
  • Thanks again JMOR. It is on my list of things to do this winter. It sits out but is covered. It spends the winters in a heated garage. Spoiled!

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