Case/Davis trencher backhoe

[Eugen]

Small steps. The rain over a few days has that effect on me, slowing me down. Not having a shop makes a lot of work dependent on the weather, in particular rain is the worse. Enough complaining.

Today there was a break in the rain. Replaced the transaxle diesel and old oil which I put a few days ago with fresh oil. Topped up the hydraulic oil which was low after a leak on a hose which was subsequently fixed. Replaced the hydraulic oil filter.

Made the jig like this

as square as I could and spot welded the eyelet on one rod. Worked surprisingly well.

Then cleaned up the outer and inner surfaces of the other eyelet on the lathe, and prepared the outer surface of the bushing.

Didn't do the inner surface of the bushing so as to keeo it as thick as possible for the press fit, which, those of us who do not own a press also call the banging fit.

Went in nice and hard.

Will do the inner diameter to fit nicely the 1-1/8 pin.


Then weld.

[DavidBarkey]

@Eugen You may need to ream / hone to size a bit after welding . The weld may pull the bore closed slightly . Don't feel bad , I have a heated shop and yet the rain has played havoc with me of late.

[Eugen]

Thanks for the tip Dave. I will fream it if needed. Fream is when you don't have a 1-1/8 big reamer and instead use a round file!

[RoamingGnome]

Another option for cleaning up the bore would be a die grinder with a small flap wheel or a carbide burr in it... spent many hours cleaning out bores on excavator buckets when the pins didn't quite fit right...

[DavidBarkey]

Thanks for the tip Dave. I will fream it if needed. Fream is when you don't have a 1-1/8 big reamer and instead use a round file!

Just wanted to make sure the pin will still fit before reassembly while it is easy to work on it . Learned that one the hard way .

[RoamingGnome]

Thanks for the tip Dave. I will fream it if needed. Fream is when you don't have a 1-1/8 big reamer and instead use a round file!

Just wanted to make sure the pin will still fit before reassembly while it is easy to work on it . Learned that one the hard way .

So true @DavidBarkey - that's a lesson many a heavy equipment mechanic has learned the hard way, Always test fit the pin in the bore when the parts are in the shop or on the ground at the job site...

[Eugen]

It may not always show, but let me tell you again now guys, your advice is really really appreciate it and I heed it.

Floppy wheels made of sandpaper strips of different sizes I never have enough, what's a good source to buy these? I know, what a noob question, because I am. Never looked for buying lots of these.

One more noob question: my compressor isn't good enough to run the air die grinder. Is there something like an air die grinder but electrical? Corded or cordless, I don't care. I could not find one.

[RoamingGnome]

Your is going to wonder about the suggestions I make to you... @Eugen The Princess is your friend - (or the emptier of your bank account ) Corded die grinder is on sale this week -

https://www.princessauto.com/en/43a-ele ... 0009033358

They are a good source for flap wheels too... That come in different Grit sizes - so choose wisely

The other option depending on what brand of cordless tools you are using - I really like my Milwaukee M12 Fuel cordless die grinder, for little jobs so much easier than dragging an extension cord around. the corded one from Princess is a good value when on sale and is in the toolbox of many a frugal heavy equipment mechanic (although we usually have access to heavy duty air compressors...)

[Eugen]

haha, @RoamingGnome thanks, I have been looking for a die grinder other than air a while ago and for whatever reason the ones that showed up in my search now didn't exist then.

I really like the M12 and I have all Milwaukee tools at the moment, M18 and M12. I've been a little disappointed with my M18 drill and impact though Another hard decision, should I stay with Milwaukee and pay double the price of the Makita 18V die grinder? ugh! maybe ask my

Or just get the corded PA one.

[RoamingGnome]

For cleaning out pin bores with a flap wheel I would suggest the PA corded one, you'll find it has a bit more torque, and you can "lean" on it a little more without it stalling out.