Help searching for a tool for a John Deere

[cliftonbros89]

I’m been trying to find some information for awhile. I haven’t tried to ask the dealer yet. Or one of the local Deere mechanics. But can some one help me find something similar to a JDG782A socket. That’s the part number anyway. I just know it’s a square for the oil gallery plug on the side of the engine block. Where you test your oil pressure.

It works for a large variety of JD tractors. Like I said I know it would take a square bit basically but I’m not sure of the size. I’m just curious so I can have something to remove the plug and make sure I have the correct size adaptor for my pressure tester.

On a side note it’s not exactly something you can google. When it comes to these JD specialty tools they’re very secretive. Sizes, brands, everything. It can be hard to find.

Any help would be appreciated.

 

[plinker]

Snap-on (and others too) has internal and external pipe plug sockets in various sizes, One of those may work, 3/16 to 3/8 in size. Some metric ones are available as well.
https://store.snapon.com/Pipe-Plug-inches-Chrome-3-8--11-pc-3-8-Drive-SAE-Internal-External-Pipe-Plug-Socket-Set-nbsp-3-16-ndash-3-8--P631401.aspx

 

[Rabid Badger]

Can you take a picture of the plug? Maybe get some dimensions with a caliper?

 

[cliftonbros89]

Can you take a picture of the plug? Maybe get some dimensions with a caliper?

I’ll have to try to get a picture tomorrow.

I might try the caliper. But I’m not sure if mine will fit it.

 

[cliftonbros89]

I will also add on a few of the tractors I’ve tried to find a part number for the actual plug to get the specs for it. However, last I tried I was unsuccessful. But I may try that route again just to see if it’ll help any.

 

[seanb02]

On the farm for a square head plug typically use adjustable wrenches as the plugs usually aren't horribly tight and there isn't much chance of rounding a square head as long as you have adjusted the wrench properly around it. Perhaps not the correct tool for the job, but it has never failed me. Granted I don't use old worn out adjustable wrenches when doing something like that.

 

[cliftonbros89]

On the farm for a square head plug typically use adjustable wrenches as the plugs usually aren't horribly tight and there isn't much chance of rounding a square head as long as you have adjusted the wrench properly around it. Perhaps not the correct tool for the job, but it has never failed me. Granted I don't use old worn out adjustable wrenches when doing something like that.

It’s an internal square plug, not an external. An adjustable won’t work for this.

Those types of plugs I have a Williams set of sockets for as I don’t care for using an adjustable wrench very often.

 

[Ole Slewfoot]

see what size drill bit fits.

 

[seanb02]

It’s an internal square plug, not an external. An adjustable won’t work for this.

Those types of plugs I have a Williams set of sockets for as I don’t care for using an adjustable wrench very often.

Gotcha, sorry for the misunderstanding.

Typically most of the internal ones I have to deal with on John Deere and others have been either 3/8's or 1/2" drive. Shove an extension in there and do what needs to be done for those. But I have come across some odd ball ones. Can't say I have any specialty tools for those. My version of a specialty tool for something like that is a piece of square stock ground to proper size with a sacrificial socket or something welded to it.

 

[Can I try?]

Hopefully I'm understanding your need correctly.

SK makes male pipe plug sockets.

https://sktools.com/shop/bits-speciality-sockets-sets.html?specialty_socket_type=454

The above link to their website is just for reference. You can definitely buy SK cheaper elsewhere, such as Harry Epstein.

You could also just use an appropriately sized piece of bar stock.

 

[cliftonbros89]

Gotcha, sorry for the misunderstanding.



Typically most of the internal ones I have to deal with on John Deere and others have been either 3/8's or 1/2" drive. Shove an extension in there and do what needs to be done for those. But I have come across some odd ball ones. Can't say I have any specialty tools for those. My version of a specialty tool for something like that is a piece of square stock ground to proper size with a sacrificial socket or something welded to it.

It’s much smaller than the typical 1/2” or 3/8” square plugs that are usually used for gearcases or hubs

 

[cliftonbros89]

Hopefully I'm understanding your need correctly.



SK makes male pipe plug sockets.



https://sktools.com/shop/bits-speciality-sockets-sets.html?specialty_socket_type=454



The above link to their website is just for reference. You can definitely buy SK cheaper elsewhere, such as Harry Epstein.



You could also just use an appropriately sized piece of bar stock.

I know the set. It’s definitely been on the list for awhile. This instance has me regretting I haven’t got it yet.

 

[mbshop]

Grind down a bolt head to fit. Then weld a nut on or use a double nut system.

 

[BigBoreFan]

Sine we are talking John Deer, off topic maybe but I found this interesting.

 

[WittHay]

see what size drill bit fits.

That is what I would do. If the 1/4 drive extension doesnt fit, use a drill bit to get the right size. Mac, Snap-on and SK all have pipe plug sockets, Just buy the size you need.

You could also try grinding or using a file on a 1/4 or 3/8 drive extension until it fits. Not the strongest way but it might work

 

[Skin]

They should just be a standard pipe plug (NPT). See if a 1/4" extension fits, if not its probably 5/16-8mm.


Taking a shot in the dark i'd guess they're 1/4" square so the extension should work and 1/8" NPT.

 

[crewchief888]

i seem to remember back when the powertech engines came out, they had a different plug in the oil galleries.

i remember ordering an oddball socket from SO

seems like it's a 3/16" square

 

[bugnut]

Key stock cut to size and an open end wrench, id can be measured with the shank of a drill bit.
I have this set and it has a few square bits Amazon, ABN 100 Tamper Security Socket

 

[bobcatdan]

If it's just a standard square plug, male plug socket should work fine, from my days as a Deere tech, never remember plugs in the engine being anything special for the most part. On some engine there are security bolts t hgv at are a pentagon with a *** in the middle. As for buying deere tools, there is a site if you search for it. Their prices are a bit high. Maybe because I still know guys at the dealer, but the couple Deere tools I have bought, I had no issues ordering from the dealer. Also depending on what it is, Deere can be pretty sane with prices.

 

[crasher98]

If it's metric those aren't easy to find -- I know because I used to have a 2005 Subaru WRX and the fill and drain plug on the rear differential were 13 mm internal pipe plug sockets. Most people used a 1/2 inch ratchet or breaker bar on them which tended to gnarl them up a bit; that had been done on mine and I didn't want to make it worse so I got Ko-ken metric pipe plug sockets from Rakuten:

https://global.rakuten.com/en/store/i-tools/item/4991644091614/

I was a little leery about buying something from a website that was mostly in a foreign language and had those oddball pictures at the top (deer w/ wrench antlers?), but it worked out fine and the sockets worked great.

Here's a photo - I of course bought all of the sizes (never know when you're going to need a 10.5 mm pipe plug socket!) and bought two 12 mm by accident; the sockets came loose so I cut some foam and put them in a little proto box. I used the 13 and 13.5 mm on the WRX and then it got totaled, but I still have the sockets!

 

[nmantas]

Both Grey Pneumatic and Sunex make them for super cheap.....for reference:

https://www.jbtoolsales.com/search.php?q=male+plug+socket

 

[M6erfan]

Ko-ken 4202...

 

[cliftonbros89]

So in between working on several other things. I did some more looking. I tried to compare to some of the square pipe plug sockets I already had when I was finally able to get it in the shop. But nothing fit.

I had some points saved up for my SK Club membership and ordered a few singles of sizes I didn’t have.

The winner is a 9/32” square socket.

I would imagine this is likely the same for a majority of Deere engines around this time. It’s a spot to test engine oil pressure without removing the oil pressure sender, as is on some of the older models I’ve worked on.

Thanks for the assistance.