Is this John Deere plug ISO 261 M 18 or??

charosenz · Jun 5, 2016

I am looking for some help in identifying the type of thread this plug has so I am sure I get the right fitting to go in its place. From what I can tell this is an 18mm ISO 261 thread (or metric ORB?) . But when I try to find a fitting for this, I cannot find it. I have looked at Northern Tool, surplus center and discount hydraulic hose.

It is the plug right below the transmission filler cap on a JD 3203 (same as the 3120 and 3320 uses).

I not only want to get a fitting for this but I also want to convert this to something more common like NPTF, which seems to be very common especially to connect QD fittings.

I also would appreciate some tips on where to find a conversion fitting. I.E. This thread to a 1/2 NPTF for example.

Suggestions and comments are appreciated.

Tx Jim · Jun 5, 2016

Here's the spec's for plug in your photo.
HTH's,Jim

charosenz · Jun 5, 2016

TxJim,

That is super helpful. I knew the part number, but not the specs.

Where can I go to find out those details on other parts? It looks like it is off off JDParts website but dang it I do not see how to access that level of detail. I hate to bug people like this, but the help is really appreciated. I suspect other folks new to all of this would appreciate it too.

For the benefit of other newbies, I will post a screen shot of the JDParts page with colored circles on the plugs on the rockshaft housing. The one in red - number 28 is the one that I want to put a Hydraulic drain line in to....The part numbers are a separate attachment.

Also attached is the page out of the hydraulics fitting guide that I think shows this is an 18mm ISO 261 fitting... I have some doubts on it actually being a ISO 261 fitting though because that style seems to be so rare on all the hydraulic suppliers website...So I am looking for some help so I know what fitting (not plug) to buy.

Hope this makes sense.

Tx Jim · Jun 5, 2016

Finding JD parts spec's is easy if the spec's are listed which not all JD parts have spec's listed. One must be registered on JDparts.com with a JD dealer. Then put part in ones shopping cart,then left click on part number in shopping cart & if spec's are available they will show up. JD is in the process of upgranding their parts system so this might not work when they change. Did I state "I can't wait" NOT REALLY.
HTH'sJim