Ford 2000 - Hydraulic pressure

MartyJay · Jun 28, 2024

Hello all,

My tractor is a 1968 Ford 2000 3cyl diesel. I've finished rebuilding the top lid and now my 3ptl is working as it did beforehand. New piston, honed cylinder o-rings, safety valve and relief valve. Oh and a very worn cam pin too.

Even when I first picked up the tractor around 7 years ago, the front end loader always struggled lifting a round bale (around 350kg's+). I had the cylinders rebuild as they were leaking, however didn't change its power. Now that I have the back end working correctly I'd like to look at the front end.
Under the seat is the remove valve control (I believe) which has two lines coming off it which supply fluid to the control valve for the FEL setup. I attached a pressure gauge to this and getting around 1000 psi only. The remote valve control unit has a casting number of C5NNB929. I replaced all of the o-rings on this when rebuilding the top lid. - The rings which meet the face of the top lid.

Is there any parts inside of the remote control valve (ie O-rings) which may have gone? I did see a video on YouTube for a later model Ford tractor which that fixed the low pressure.

Or is it likely I need to rebuild the hydraulic pump?

Any help would be appreciated..

EdGooding · Jun 29, 2024

I do not know for sure, but I think you should be seeing closer to 2,000 psi on your pressure test. This service manual is from 1964 and may not be 100% relevant, but I'll offer it in case it can provide some answers to you until someone more experienced can respond: https://www.ntractorclub.com/manuals/service-troubleshooting/Servicing Single and Double Spool Valves.pdf

MartyJay · Jun 30, 2024

Thanks Ed. Unfortunately my remote appears to be different. Had a good look at it today and not sure about it. I'm starting to lean towards the pump, however I think I forgot to replace the o-ring on the main check valve which goes in the front of the top lid.......Looks like I'd have to remove the whole lid again to get to it.....But not sure its related.

John0829 · Jun 30, 2024

According to my information the pump should be giving you 2000 psi at 2000 rpm. lt recommends replacing the hydraulic relief valve and checking the flow control valve, for scoring, excessive clearance, ect., as causes for low pressure.

careyo63 · Jun 30, 2024

Had a low pressure problem with a pinched off Hyd. line inside hose. Swell up and pretty much pinch it off inside it. Serv. new fluid cleaned the Filter screen etc.. Made it worse so I pulled it back down and lucky I looked inside the Hose and seen it. I shortened that section and it's really smooth operating now. You can see the small section right before the Strainer basket to the pump. Ph. camera so I was lucky to get it all.
My thinking was a Hyd. Pump itself either works or it doesn't. That's how I found it. Shop Mentioned he thought it had a problem. Which was loose a Pully and Drive shaft bolts. Tightened those up and made it much better

MartyJay · Jun 30, 2024

John0829 said:
According to my information the pump should be giving you 2000 psi at 2000 rpm. lt recommends replacing the hydraulic relief valve and checking the flow control valve, for scoring, excessive clearance, ect., as causes for low pressure.

Hi John,

Certainly replaced with a new relief valve when I did the rear lid. In respect of the flow control valve - is this the one in the centre of the top lid?