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Nebraska Cowboy 11-02-2009 10:33:15 40.0.40.10 739500 Report to Moderator	1948 -8N Ford, all original, 6 volt ets. Hydrualic lift will come up and then "kick out" and go back down, with or without an implement on the lift. Took off the lift cover, followed the Ford shop manual, made sure all the springs were the right length, rod is not bent,etc. Looks to me like nothing was ever touched here. Took the pump out and took it to an old Ford mechanic and had it rebuilt. Put pump back in the tractor, same problem. (I realize rebuild kits aren't always perfect and parts can fail). With the inspection cover off both sides, the pump runs fine however, when it gets to the top, it will kick out and the lift will drop. What am I missing? [Reply]   [Send Email]
JMOR 11-04-2009 04:43:19 72.181.156.161 739725 Report to Moderator	Re: 8N 3 Point lift in reply to 36 coupe, 11-02-2009 10:33:15   Nebraska Cowboy said: (quoted from post at 19:10:13 11/03/09) Rate of fall is just as if the lift were going down, not a fast rate, just regular drop "Regular drop rate" sounds like the Exhaust control valve is being opened by the linkage, then, because if it were just a leak, it would likely drop slower (seconds to minutes) unless it turned out to be a gigantic leak, in which case it might never lift. What about a lift to say half of all the way up? Will it hold that position (small lever vertical/position control?   [Reply]   [No Email]
JMOR 11-03-2009 05:00:23 72.181.156.161 739609 Report to Moderator	Re: 8N 3 Point lift in reply to Crazyfethers, 11-02-2009 10:33:15   Nebraska Cowboy said: (quoted from post at 08:23:30 11/03/09) JMOR, have tried that process. Have a lot of pressure on the rod when you try to hold it in. Just have the tractor at idle when I'm doing this. That is probably more reason to believe that linkage is a problem, as in "It should only back away from the pump enough to close the INTAKE Control valve BUT NOT enough to open the EXHAUST Control valve." However, you didn't describe the rate of fall. Your words, "kick out" suggest a fall as in a normal lift would if lever moved to 'down' as opposed to a slow leak down. If quick fall vs slow, then once again look to linkage. This post was edited by JMOR at 05:03:12 11/03/09.   [Reply]   [No Email]
Nebraska Cowboy 11-03-2009 15:10:13 40.0.40.10 739651 Report to Moderator	Re: 8N 3 Point lift in reply to JMOR, 11-03-2009 05:00:23   Rate of fall is just as if the lift were going down, not a fast rate, just regular drop   [Reply]   [Send Email]
JMOR 11-02-2009 18:19:01 72.181.156.161 739582 Report to Moderator	Re: 8N 3 Point lift in reply to budman, 11-02-2009 10:33:15   Nebraska Cowboy said: (quoted from post at 21:58:42 11/02/09) New o-ring in teh cyclinder, everything on the top cover is good. If I chain teh lift arms down, will that show where the leak is at? I'm with Zane in betting on something mechanical vs a leak. Take right inspection port off and watch control rod at pump Control valves when this "kick out" occurs. It should only back away from the pump enough to close the INTAKE Control valve BUT NOT enough to open the EXHAUST Control valve. You may be able to modulate this with your hand on control rod.   [Reply]   [No Email]
Nebraska Cowboy 11-03-2009 04:23:30 40.0.40.10 739606 Report to Moderator	Re: 8N 3 Point lift in reply to JMOR, 11-02-2009 18:19:01   JMOR, have tried that process. Have a lot of pressure on the rod when you try to hold it in. Just have the tractor at idle when I'm doing this.   [Reply]   [Send Email]
ZANE 11-02-2009 15:44:46 64.12.116.20 739546 Report to Moderator	Re: 8N 3 Point lift in reply to Nebraska Cowboy, 11-02-2009 10:33:15   Does the touch control handl fall when the lift falls????? If so the friction disc need to be tightened or replaced on the quadrant. It is possible that the cam follower pin is work off and dropping off the cam when it reaches the top of it's travel and the picks it up again when the touch control handle is lowered. Also the link that holds the pin can be bent or worn so at the pivot point that it can't stay on the cam. Zane   [Reply]   [No Email]
Nebraska Cowboy 11-02-2009 17:56:08 40.0.40.10 739577 Report to Moderator	Re: 8N 3 Point lift in reply to ZANE, 11-02-2009 15:44:46   No, touch control hand doesn't fall, have the small lever in the up postion   [Reply]   [No Email]
Dean 11-02-2009 12:04:57 67.172.13.37 739523 Report to Moderator	Re: 8N 3 Point lift in reply to Nebraska Cowboy, 11-02-2009 10:33:15   Do you have the draft/position control lever set to position control mode? Dean   [Reply]   [No Email]
HCooke 11-02-2009 10:46:44 70.195.65.207 739505 Report to Moderator	Re: 8N 3 Point lift in reply to Nebraska Cowboy, 11-02-2009 10:33:15   Need to remove the right inspection port and look in when running and see where the leak is when it falls back down. Most likely causes would be 1) cylinder leak, 2) relieve valve bad, 3)crack in pump, 4)blown gasket.   [Reply]   [Send Email]
Nebraska Cowboy 11-02-2009 17:58:42 40.0.40.10 739578 Report to Moderator	Re: 8N 3 Point lift in reply to HCooke, 11-02-2009 10:46:44   New o-ring in teh cyclinder, everything on the top cover is good. If I chain teh lift arms down, will that show where the leak is at?   [Reply]   [No Email]