Rhino sphd post hole driller shear pins

Luath · May 16, 2017

Hi Guys,

Can anybody suggest a source for these pins. I'm located in Manitoba.

Luath

zoedog2012 · May 16, 2017

I have the RPHD model but my operators manual list the same shear bolts for HPHD and SPHD. The manual calls for Cap Screw part # 00999418.
This bolt is for the auger. The next page says to not use a fastener harder than Grade 2 which I believe would be a machine bolt rather than a cap screw.

Luath · May 17, 2017

What grade of oil for the gear box and where might I but the bolts? Thanks

zoedog2012 · May 17, 2017

My manual specifies #2 grease for the gearbox and you can purchase grade 2 bolts at your hardware store.

Luath · May 17, 2017

Thanks for the info.

Luath · May 20, 2017

I've only found grade 5s or 8s in the hardware stores, will grade 5s be ok?

Texasmark · May 20, 2017

Luath said:
I've only found grade 5s or 8s in the hardware stores, will grade 5s be ok?

I have toyed with that idea for lots of years. From the negative side, my JD round baler specifies a ¼" grade 8 for a shear bolt. My mowers usually use ½" Grade 2. The grade 8 snaps and the grade 2 smears but also takes hits that would break the 8 since it's higher tensile and more brittle. apparently the baler has more things that can tear up than the mower and your post hole digger.

The other thing I found was that a 2 is easier to locate to punch out and clear the hole. The 8 is hard to find.

So, the 5 is in the middle...maybe the best of both worlds.

I would use a 2 and 5 indiscriminately to answer your question.

While you are on the subject, my digger has the shear bolt on the input shaft and it's a pain to change. What I started doing was to use one bolt to hold the auger to the output shaft of the gearbox rather than have bolts in all 3 slots. Lots easier to find and fix when sheared. Yes I know the torque is higher and rpms slower on the output shaft but even with that, the single bolt seldom shears.