hydraulic lift control valve adjustment tool

Jay Pea

New User
Showcrop suggested that I check this forum for specs related to a Ford special tool NCA-502 used to adjust the control valve on the lift cover for a 1955 Ford 641. If someone knows the specs on the gauge I"ll make a few.
 
I believe that the specs were posted here one time in the past but do not have the information at hand.

I would be interested in one if you reproduce them.

Another tool that would be handy and, I believe, necessary for use with the NCA-502 gage is the lift arm positioning fixture (do not have the Nuday number here).

Dean
 
(quoted from post at 14:18:19 05/01/13) Showcrop suggested that I check this forum for specs related to a Ford special tool NCA-502 used to adjust the control valve on the lift cover for a 1955 Ford 641. If someone knows the specs on the gauge I"ll make a few.
eading of FO-20, indicates 0.395-0.397 inch for draft & 0.448-0.450 inch for Position ctrl. If I recall correctly, the exact surface measured to or reference is somewhat of a question, because of the retainer plate.
 
I have them all if anyone would like pictures and measurements.I think I have all the Ford tractor tools from the N's through the 10 series,including 2 clutch fixtures and the 8N govenor fixture and some SOS tools. Many I have never used.I got them all when New Holland yanked the local dealership and the owner happened to be my friend.
 
(quoted from post at 20:38:28 05/01/13) I have them all if anyone would like pictures and measurements.I think I have all the Ford tractor tools from the N's through the 10 series,including 2 clutch fixtures and the 8N govenor fixture and some SOS tools. Many I have never used.I got them all when New Holland yanked the local dealership and the owner happened to be my friend.

Finding someone with these tools is great as they are becoming so rare. Pictures and measurements of the NCA-502 Gauge and the NCA-503-B Lift Arm Holding Fixture would be extremely helpful. My shop manual shows both of these tools so I know what they look like. I really need the specs so I can make them.
 
Finally got around to hunting the guage and making a quick sketch.I also have a SW-508-A for the later tractors.I have all the tools that Dean mentioned but do not relly know how to get any accurate measurements on them. Any questions, just ask.
a113979.jpg
 
The important dimension for the 503 tool will be the vertical distance from the top cover gasket surface up to the center line of the pin going thru fixture & lift arm.
 
(quoted from post at 13:13:35 05/03/13) Actually there are 3 fixtures- NCA-503 -N-503 and a HG 101. Take your pick.
a114044.jpg
was speaking of dimension regarding the two 503 tools. I see that you have the HC-100 for setting the 8N control rod position as well.....a rare critter! I can't read the word after 'finished' and before 'indicates'???
 
(quoted from post at 18:31:34 05/02/13) Finally got around to hunting the guage and making a quick sketch.I also have a SW-508-A for the later tractors.I have all the tools that Dean mentioned but do not relly know how to get any accurate measurements on them. Any questions, just ask.
a113979.jpg

Thanks welding man! That's exactly what I needed. The 502 tool will be very easy to reproduce. The 503 and the 503-B is a different animal. Thanks again!
 
JMOR, I will try to figure out some way to get you some accurate measurements tomorrow. The writing on the HG 101 says (finished edge indicates center line of ball with an arrow pointing to a hole. The very end has 2 notches, one for draft and one for position.
 
That HG-101 is really intriguing! As for the other two, if you can clamp the bolted part down to a real flat surface & then measure from that surface up to center line of the hole for lift arm pin, I believe that defines the dimension it was intended to set. Some real neat items to own, for sure!

The HG-101 is probably like the attached sketch (can't see the full part in your picture).
 
JMOR the 503 fixtures are exactly opposite of what you are thinking,if you clamp them down flat,the hole is down,not up,plus the distance from the top bolt hole to the center of the pin hole is critical, and the offset to the right is different on both.
 
(quoted from post at 09:13:11 05/04/13) JMOR the 503 fixtures are exactly opposite of what you are thinking,if you clamp them down flat,the hole is down,not up,plus the distance from the top bolt hole to the center of the pin hole is critical, and the offset to the right is different on both.
ou are absolutely correct! I shouldn't post so late at night! Get my "ups" & "downs" all mixed up!
Yes, for someone wanting to make one of these tools, the dimensions you speak of are important for sure, but all I want to establish is the height of the lift arm pin hole above the top cover gasket surface (as set with this tool). I won't make a tool for that. For myself, I will just use a carpenters square and measure XXX inches up.
 
JMOR and others here is a sketch of the NCA-503 1955 and up. The N-503 is for Jub and NAA. I am not a draftsman,I hope you understand the drawing.
a114170.jpg
 
Looks good to me! I'm sure all will appreciate it. Any comments on the HC-101 sketch that I posted?
 
I have never used the HG-101. Most of my work on the N series tractors have been engine, clutch, and transmission related.I have not worked on too many with hydraulic problems.Most of my work is on the Blue Fords 1965 and up 3000 thru TW-5. I have these tools because I bought everything the old Ford dealer had, including the valve grinding equipment and rod bushing hone.
 
OK. Thanks for everything in all the info on rare tools. If you wouldn't mind correspondence by e-mail or phone, send me an e-mail. My e-mail is open on Modern view & on this message in Classic view.
 
(quoted from post at 12:17:40 05/03/13)
(quoted from post at 18:31:34 05/02/13) Finally got around to hunting the guage and making a quick sketch.I also have a SW-508-A for the later tractors.I have all the tools that Dean mentioned but do not relly know how to get any accurate measurements on them. Any questions, just ask.
a113979.jpg

Thanks welding man! That's exactly what I needed. The 502 tool will be very easy to reproduce. The 503 and the 503-B is a different animal. Thanks again!


Can you send a picture or the specs for SW 508A
 
(quoted from post at 12:17:40 05/03/13)
(quoted from post at 18:31:34 05/02/13) Finally got around to hunting the guage and making a quick sketch.I also have a SW-508-A for the later tractors.I have all the tools that Dean mentioned but do not relly know how to get any accurate measurements on them. Any questions, just ask.
a113979.jpg

Thanks welding man! That's exactly what I needed. The 502 tool will be very easy to reproduce. The 503 and the 503-B is a different animal. Thanks again!


Can you send a picture or the specs for SW 508A
 
(quoted from post at 11:18:19 05/01/13) Showcrop suggested that I check this forum for specs related to a Ford special tool NCA-502 used to adjust the control valve on the lift cover for a 1955 Ford 641. If someone knows the specs on the gauge I"ll make a few.

Did you ever get the specs and make any nca-503 guages?
Canyonmill
 

The nca-503 guage would you be willing to ship it to me so I can copy it? I would be willing to pay for the shipping and return shipping.
Thanks
Canyonmill :roll:
 
I found this post researching hydraulic adjustment for my Fordson Dexta. The Dexta uses tools N-503 and NCA-502 for hydraulic adjustments. The Dexta shop manual provides alternate procedure/measurement when these tools are not available. It appears N-503 positions the lift arm 1/2" above the mounting plane of the top cover. The key dimensions for NCA-502 are listed as:
[list:c306718a1b]0.396" for Draft setting
0.449" for Position setting[/list:u:c306718a1b]
These are not inconsistent to measurements of a sample NCA-502 provided in the sketch.
 
I know this is an old subject but would like to find the SW-508A Tool or a suggested alternative to use something else.
 
(quoted from post at 22:09:54 04/11/22) I know this is an old subject but would like to find the SW-508A Tool or a suggested alternative to use something else.

I only know the Dexta, so not familiar with this tool. Perhaps guidance from [i:7d5fa5b915]Ford 600 800 Tractor Hydraulic Lift Adjustment[/i:7d5fa5b915] https://www.youtube.com/watch?v=SIgDX6L7ST0 which appears to not use special tools, just special measurements.
 
Get the I&T after market service manual. It has alternative adjustment procedures that do not require the special Ford/NuDay tools.
 
I've got that manual - wow I need to go look again - did not see that. What they show was very undetailed picture not really showing the measurement from where to where. Also I can't see anything wrong with my lift after removal except the return tube was broke from the hanger and the spring was gone. My problem was that it seemed to be in draft all the time, up was all the way up and down was all the way down. Does anyone know what would cause that?
 
Well, I'm lost, don't know what to measure and what to measure with! Hate to show my ignorance but is there someone out there that could explain in simple terms what is to be measured. A sketch showing where to measure from and to would be great. Next, guess I'll have to find someone that can come do it for me.
 
(quoted from post at 13:34:23 04/18/22) Well, I'm lost, don't know what to measure and what to measure with! Hate to show my ignorance but is there someone out there that could explain in simple terms what is to be measured. A sketch showing where to measure from and to would be great. Next, guess I'll have to find someone that can come do it for me.
hich Dexta model?
 
Sorry, I did not tell what my tractor is - it is a 1973 Ford 3000 Diesel. Lift was quirky and wanted to go all the way up or all the way down with it in the Position mode. Tube was fallen out of the top and spring is gone off of the flow control limiter. Don't see anything else that could be wrong.
 
(quoted from post at 13:34:23 04/18/22) Well, I'm lost, don't know what to measure and what to measure with! Hate to show my ignorance but is there someone out there that could explain in simple terms what is to be measured. A sketch showing where to measure from and to would be great. Next, guess I'll have to find someone that can come do it for me.
K, so I got mixed on what tractor you have. However, the Ford 3000 and Dexta are similar enough in this area that these two images should help you in where to apply the slip gauge (0.390 and 0.450) and what is being adjusted at that point of measurement.
zgQRA25.jpg
 

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