Jinma 284 steering ram threads

While not as easy to use as the right size threading die, I have standard and metric thread files. They are about 1/2″ square and 10″ long with 4 different pitch sizes on each end, giving you 8 thread pitches per file, and they're pretty cheap, way cheaper than one die that large that you will probably never use again.

I have a universal threading file – a simple triangular file of the 60° equilateral triangle persuasion.  One size fits all 60° threads.  Okay, I actually have a few of them indifferent sizes as the bigger ones won't work well on smaller bolts.  And they all take plenty of patience, compared to a threading file or a die!  Us poor folks gots poor ways, right?

One issue you may run into on things like that rod end is that they often use a very fine-pitch thread, not one commonly available in dies.  I can't recall what my steering cylinder has, but I had the same issue you do and just chased the threads with the triangular file and it worked fine.  I do have a metric die set so I think I would have used that if it would have worked, unless I was doing it in the field.  It's been a few years and I can't recall exactly.

I was working on my hydraulic ram last week to stop a chronic leak.  I was referred to a local job shop in Millersburg, OR- Industrial Rebuilders, and they sold me a seal ($12 with the wiper) that, while it doesn't fit exactly the same, it doesn't leak.  Anyway, I looked at their shop and saw that they rebuild all kinds of hydraulics, and can machine lots of other things, too.

I'd recommend bringing the threaded end to a machine/hydraulic rebuilder and see if they're friendly enough to chase your threads for a little money.  They should figure that you'll be back soon enough.

After I fixed that leak, my LH front wheel fell off at the plate to the front differential.  I'll start another thread about that, but I wish all I had to work on was the ram.

Best,

Scott Bruslind

Lacomb, OR

Great, another threaded connection to check before getting to work.  I think I spent less time pre flighting my Cessna before flying than I do my tractor before working!

bet the plane was made with tighter tolerences and passed more inspections than the tractor when new

My tractor is a Luzhong 284.  As far as I can tell most of the parts are identical to the Jinma. The diameter on mine is 18mm with 1.5 pitch for what ever that's worth.