Author	[Modern View]
Icuby 10-17-2012 09:29:46 174.230.192.215 Report to Moderator	Lifts when select.valve is in any pos.but will not lift load and tractor has to run at high RPM for any of this to happen. I have put hose from plug on top of pump and run to the resivor and I have full stream of oil. Thiis has single remote valve and hose on it also.. I put gauge in this hose and see very little if any pressure. Any and all help appreciated. Thanks [Reply]   [No Email]
ericlb 10-18-2012 07:25:58 75.107.64.57 Report to Moderator	Re: NAA hyds.problem in reply to Icuby, 10-17-2012 09:29:46   the only thing i can add here is my jubilee has the optional valve on it too i dont use it for anything but ive found it is touchy as to its position, if its not centered, exactly, it will cause the 3 point to lift slowly, and its easy to bump the handle with a foot when climbing on the tractor, dont know if it will help, but you might check that, also i rebuilt the lift cylinder and piston last year, when hot the 3 point would raise, but not with a implement on it, cold it was ok, i discovered the piston rings completely gone when i tore it down, i suspect broken rings may cause the symptoms too   [Reply]  [No Email]
JMOR 10-17-2012 17:21:54 72.181.173.171 Report to Moderator	Re: NAA hyds.problem in reply to David G, 10-17-2012 09:29:46   Quoting Removed, click Modern View to seeWhat happens to the clip & hood-like piece? Just let them fall inside or what?   [Reply]  [No Email]
ZANE 10-17-2012 16:09:29 98.83.74.55 Report to Moderator	Re: NAA hyds.problem in reply to Icuby, 10-17-2012 09:29:46   Could be a bad pressure relief valve. Have to take the cover off to replace on the NAA. It is located at the back of the ram cylinder housing lying horizontally. I have found foriegn material under the relief valve ball a few times. This can be fixed by removing the valve cover/cap and cleaning it up. I have also been able to refinish the seat and replace the ball on a few of them. Zane   [Reply]  [No Email]
WayneIA 10-17-2012 16:51:19 199.120.65.218 Report to Moderator	Re: NAA hyds.problem in reply to ZANE, 10-17-2012 16:09:29   I beleive this is reference to the cylinder safty valve. The system releif valve is at the bottom of the center housing in the right front corner.It can be accessed by removing the little plate on the under side of the center housing right front corner.Use a 1/4 NC bolt to tread in to the bottom of the valve and pry it out. Make sure to drain the system or you are in for an oil bath.   [Reply]  [No Email]
soundguy 10-17-2012 10:40:31 184.245.156.8 Report to Moderator	Re: NAA hyds.problem in reply to Icuby, 10-17-2012 09:29:46   in reading your post i'm 'guessing' you are doing your hyds test wrong. ok.. hose from pump to sump and you have flow.. good. now.. put a guage into that hole.. now chain the 3pt arms down.. now raise the 3pt lever... the system, ideally, should pressurize and go into relief bogging the engine a bit and letting you read the pressure.. I'd expect anything from 1500-2250 psi depending on the pump. anything lower and you've got buypassing and or a leak or weak relief. ok.. so you have some sort of valve on the top cover. post a picture of it... and describe, more clearly, what happens when you do certain things. IE.. manipulating the valve.. and or 3pt.. etc. more words on your part will = better answers on out part. also.. that pressure test can be done on the output of the hyd valve too, and will tell you slightly different imfo , possibly, as it is picking up oil and diverting it from the 3pt before the cyl.. thus if you had a massive leak at the cyl and had a weak 3pt.. but the remote pressurized fine.. that would help you make a decision. use a 3000 psi gauge for safety.. post back   [Reply]  [No Email]
old 10-17-2012 10:29:54 209.86.226.60 Report to Moderator	Re: NAA hyds.problem in reply to Icuby, 10-17-2012 09:29:46   Low pressure no lift. You should have some place like 1500PSI or more there so low means either bad pump or a hole in the pressure line inside the trans/hyd comp.   [Reply]  [No Email]