Flail Mower Let's talk flail mowers

[Jelf]

OK, proper nuts and bolts. I'm convinced.
It was just wishful newbie thinking.

 

[whirly]

OK, proper nuts and bolts. I'm convinced.
It was just wishful newbie thinking.

Actually the Clevis/Cotter pin combination works very well and is much easier to install or remove than nuts & bolts. My Mott 72 has 92 mounting stations with 184 knives and it only takes about 3 hours to remove and replace ALL of the knives. Additionally, the only tool you need is a pair of needle nose pliers - maybe a small hammer if the clevis pin is rusted or has grass wrapped around it.

 

[IslandTractor]

Actually the Clevis/Cotter pin combination works very well and is much easier to install or remove than nuts & bolts. My Mott 72 has 92 mounting stations with 184 knives and it only takes about 3 hours to remove and replace ALL of the knives. Additionally, the only tool you need is a pair of needle nose pliers - maybe a small hammer if the clevis pin is rusted or has grass wrapped around it.

What grade clevis pins does the Mott use?

 

[whirly]

What grade clevis pins does the Mott use?

I replaced all of the clevis pins with ones I bought from FlailMaster, mainly because they were inexpensive. I have 50+ hrs on them now and there have been no issues.

 

[Jelf]

Does anyone have an extra extension tube for the gear box to sell? I understand that when you buy this from British Metrics you have to buy 2.

If not, I will buy 2 and have one to sell.

Also, could someone please post the FlailMaster part # for the shackle and knives that work with the Caroni B rotor?

Update:
I ordered 2 of the extension tubes. Send me a PM if you would like to buy the extra one at cost + shipping.

Here are some FlailMaster part numbers.

M-108381 Replacement for the OEM Y blade on the B rotor. You need 2 per attachment point.

M-100761 Clevis for B rotor. This is too wide and so either needs to be ground down or pinched. DaNag said:

Put the head of a M10x80mm bolt in a vice, toss on the clevis and some strategically placed washers, attach a nut to the opposite side of the clevis and go at it with a ratchet/socket. Bends without much effort at all.​

 

[IslandTractor]

Looked up the bolts I use for attaching modified Flailmaster clevis to Caroni rotor: 3/8-16 coarse thread 2.75 inches long. Grade 8. Use matching nylock nuts. Advantage of the 2.75" bolts is that there is virtually no threaded area exposed to high speed debris once the nuts are in place. That makes them MUCH easier to remove than the factory supplied bolts. I didn't buy the bolts and nuts from Flailmaster. Invoice in photo below shows one internet source but even A box store should have them.

 

[Arc weld]

Mott uses special cotter pins that are flat on one side. The flat side goes against the mount, so it's easy to the bend the other side 45 deg. without the pin turning. That's all they need and there's millions of them installed on Mott/Alamo flails with no problems. If you're hitting big rocks and debris with the rotor, losing cotter pins is the least of you worries.

 

[KenB2920]

With my ford 918h, it has the nut and bolt style. (Much easier than my Mott but and bolt style) but it is still a pain.

Is there a way I can change it to the cotter pin style like the motts that use that style? Anyone ever gone from a nut and bolt to a cotter? (On any flail)

 

[Jelf]

With my ford 918h, it has the nut and bolt style. (Much easier than my Mott but and bolt style) but it is still a pain.

Is there a way I can change it to the cotter pin style like the motts that use that style? Anyone ever gone from a nut and bolt to a cotter? (On any flail)

In another forum I learned that the bolt used on the Caroni TM1900 is class 8.8 which corresponds to about SAE 5. I have looked online for class 5 clevis pins without much luck unless you want to spend $$$ for stainless.

 

[KenB2920]

In another forum I learned that the bolt used on the Caroni TM1900 is class 8.8 which corresponds to about SAE 5. I have looked online for class 5 clevis pins without much luck unless you want to spend $$$ for stainless.

Bummer, how much was it going for ? Could be worth it