What are the drain plug sizes for a Ford 8N Tractor?

The subject explains it all. I just bought this tractor off of someone and I need to buy some tools to change all the fluids. I just need to know what the Hydraulic, Oil, Transmission drain plug sizes are. Also, I need help finding the rear-end plug. I believe that last plug may be covered by a plate, but I am not sure.

8N has 3 drain plugs for the Transmission/hyd/rear end and one fill plug by the shifter for them all. Do not remember the sizes for them off the top of my head. But if I remember right 2 are a 3/8 drive of a socket wrench and the other on a 1/2 inch wrench will take that one out but it has been a long time since I have messed with an 8N

I have found three drain plugs. One for the oil, transmission, and hydraulics. They all appear to be silver hex heads. I am having trouble locating the rear end plug. I believe that it is covered by a plate that is used for the draw bar. Is it possible that someone has changed the standard plugs for hex head plugs? Am I looking in the wrong place for the rear end plug? The plate has four bolts.

If it has the swinging draw bar the draw bar may need to be pull off or swung to the side to see the drain plug for the rear end. Get your self a I-T FO4 manual and it will be a great help

One drain plug under the transmission, one under the hydraulic pump and the last under the differential. The one under the diffy is a pipe plug, unlike the others you have found so far.

The transmission, hydraulics and differential all share a common (approximately) 5 gallon sump.

See 3 & 4 (I think!!) of Bruce's 75 Tips.

Of course that doesn't answer your question!! If no one else pops in with the correct wrench size, I will try and remember to check it out tomorrow.....

Trans/Hyd are 1 1/6 box wrench R/A is square dead.

The OE drawbar plate does not have to come off. May bee someone broken the head off flush or used an inverted head plug. Scrape the gunk
off for a looksee

The rear end tranny diffy case is a pipe plug -I believe you can get it with a 9/16" open end wrench as it has a square tang on it. If stubborn, try a crescent wrench or the open end wrench with a cheater bar (piece of pipe). You will loosen this plug FIRST every time you drain the hydraulic oil. Then move up towards the front of tractor to the next plug. It will take a 1-1/16" open end wrench and it has a rubber gasket underneath. You will replace this gasket with a new one when putting the plug back on. The final plug is similar and uses the same 1-1/16" wrench. Always start at the rear with small pipe plug and work forward. Always replace gaskets with new ones and do not use any ant-seize goop on any threads. DO NOT OVERTIGHTEN plugs! Once plugs are back in place, refill with clean, fresh oil. Do not overfill. Best to just put 4 gallons in and check level after that. Always check for leaks after the job is done and tractor is running.

[i:654c4848f0][b:654c4848f0]<font size="4">Tim *PloughNman* Daley(MI)</font>[/b:654c4848f0][/i:654c4848f0]<table width="100" border="1" cellpadding="0" cellspacing="0" bordercolor="#000000"><tr><td height="25" colspan="2" bgcolor="#CC0000"></td></tr><tr><td> </td><td></td></tr></table>

The link is a chart from a 1950 8N Operator's Manual but is in every 8N Operator's Manual. It shows the three drain plugs for the hydraulic/tranny oil. When draining the oil, always start at he rear diffy plug and work forward. The diffy plug is a 1/2" Pipe Plug with a 9/16" square end. There should be no bracket interfering with access to it unless the bracket is a Farmerized unit. The next plug uses a 1-1/16" open end wrench or a 6-point socket. The final plug forward of that also uses the same tool and both of these plugs are the same part number, 8N-7010 and both use the same gasket, p/n 8N-7011. Always replace the gaskets with new ones. NEVER OVERTIGHTEN. Do not use any ant-seize lube on threads. If the oil has a milky color to it, it has been contaminated with water so you will need to investigate further as to why that is before you replenish the system with new, clean oil. To all N-Owners, it highly recommended that you get three manuals that are essential to owning and operating an N-Series tractor. The first is a copy of the original Operator's Manual, the second is a copy of the MPC (Master Parts Catalog) and both should be exclusive to the model year of your tractor to help avoid confusion. There are copies available of every year of 8N tractor and there is a standard MPC that says 39-53. The last manual is published by I&T and is the F-04 Manual. All three are now your bedtime/coffee table reading bibles. Read them often. Most all of your questions can be answered with just these three manuals. You must know the do's and don'ts of operating any machine and these old wonderful tractors are no exception. There are safety factors to be aware of and just the Operator's Manual will tell you how to do most preventative maintenance projects.

[i:654c4848f0][b:654c4848f0]<font size="4">Tim *PloughNman* Daley(MI)</font>[/b:654c4848f0][/i:654c4848f0]<table width="100" border="1" cellpadding="0" cellspacing="0" bordercolor="#000000"><tr><td height="25" colspan="2" bgcolor="#CC0000"></td></tr><tr><td></td><td></td></tr></table>