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post #1 of 14 Old 05-25-2019, 06:12 PM Thread Starter
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New to me flail mower

Today I purchased a flail mower from a very pleasant gentleman who has operated Gravelys forever. It will take a little work in the blades department. A selection of the blades are balky or stuck but PB blaster is helping some of them out. In the end I donít think it matters because the blades all appear to be dethatching blades and Iím looking to do some light brush clearing. Maybe Iím wrong but I think the cutting knives have a j bend and hang in a y pattern. Either way Iím very excited to work on this and get it running. Iím assuming that I will need to find a way to get it balanced. Also the current knives are attached by double nuts (in most cases) sometimes lock nuts and in one case the original cotter pin. Is there any consensus on the best method realizing that keeping them all the same is optimal? Thanks in advance for looking.
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Last edited by Austen; 05-28-2019 at 11:40 AM. Reason: Fixed typo in thread title
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post #2 of 14 Old 05-27-2019, 09:27 AM
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Re: Ew to me flail mower

Get new blades, pins, and cotters. You wonít regret it.



Clean cutter tiller blades
169 S. Sierra Way
San Bernardino, CA 92408
Phone number 909-889-4084
800-345-2335
Fax 909-884-5954

Flail mower replacement knives
44911 model

Mott Flails CL101031
Gravely part #20090500

http://www.rrproducts.com/p-676874-knife-c5-34-x-5.aspx

(the 101031 blade was both narrower and thinner, and if in fine grass gave a slightly smoother cut, but only nominally so. The 102086 is both wider and thicker, and lasts longer, especially for rough work. I quit using the thinner blades when the thicker ones became available several years ago.)

000026 Cotter Pins
Mott knife pins 101034. 701036
Gravely part # 20090600
7/8 X 0.281

Do you need an original owners manual?

Hope that helps. Steve


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post #3 of 14 Old 05-27-2019, 06:34 PM Thread Starter
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Re: Ew to me flail mower

Hi many thanks for the helpful reply. Do you have any idea if ring-mounted knife/blades would work? The idea is that they can move laterally if they encounter a rock etc. There is an old Gravely advertisement for them. And thanks I have a manual for the flail. Appreciate the help.

A flyer showing the ring mounted flails (apparently an improvement) is here:

Quote:
Originally Posted by arcam8123 View Post
Steve in KY just told me that both the knives and the adjuster were from Gravely. No part numbers other than theAttachment 2337485




Regards
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post #4 of 14 Old 05-28-2019, 11:26 AM
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Re: Ew to me flail mower

These flail mowers work great. Mine's missing the top cover, but it's one of my absolute favorite Gravely Attachments. I have a Pro-16 but amazingly it runs perfect on a LI.
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20+ Functioning Gravelys
4-IH Cub Cadets -- Needed some red in my shed

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post #5 of 14 Old 05-28-2019, 07:07 PM Thread Starter
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Re: Ew to me flail mower

Quote:
Originally Posted by Steveamy40342 View Post
Get new blades, pins, and cotters. You wonít regret it. ... The 102086 is both wider and thicker, and lasts longer, especially for rough work. I quit using the thinner blades when the thicker ones became available several years ago.)
Ordered the 102086 blades pins and cotters today. Many thanks! Do you run washers between the blades? Current set up has them and some photos seem to have them but not consistently. Thanks
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post #6 of 14 Old 06-01-2019, 09:07 PM Thread Starter
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Tonight I removed all the thatching blades. The prior owner had double nutted them and they were secured with with Superman strength, rust and yard debris. My buddy predicted it was a three beer job. Well almost. But a lot of pb blaster, wrenching and luck over 2 hours got it done. Wow. What a job. Got sweet new knives pins and cotters. Going on tomorrow or soon. One of the knife ears (mount) is missing and one has a crack. Probably get new ones welded it looks like the prior owner repaired a few.
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post #7 of 14 Old 06-08-2019, 07:56 PM
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Re: New to me flail mower

[wiping drool off keyboard]

I would looooove to find a flail mower for my 5665. How hard/long did you guys have to look for these? They seem relatively rare.
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post #8 of 14 Old 06-09-2019, 06:54 PM Thread Starter
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Re: New to me flail mower

Hi Evanhauer. In my case I look at local Craigslist sporadically and this just popped up. Apparently it had been on for a few weeks. I have 2 out of 4 new knife rows installed. It is a bit of a job especially when some of the mounting ears have been modded over time. Canít wait to run it!
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post #9 of 14 Old 06-09-2019, 06:57 PM Thread Starter
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Here is a photo
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post #10 of 14 Old 06-09-2019, 07:12 PM
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Re: New to me flail mower

I've had Gravelys for 30 years and never saw that attachment......nice!
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post #11 of 14 Old 06-14-2019, 07:37 AM
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Re: New to me flail mower

Nice looking attachment. Was this part of the lot of Gravely stuff the guy had near York for around $1000? I know a lot of people were interested in that flail, but he was looking to sell everything together. Let us know how those knives you bought work out. I've got a flail I picked up two years ago that I've been meaning to rehab and replace the kniives on, but just haven't gotten around to it.

Rick

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post #12 of 14 Old 06-29-2019, 06:25 PM Thread Starter
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I’m not sure. The man I bought it from had purchased a lot from a tree farm. Today I lowered the cut from 4” to about 2.5 it is the sweet spot in my view so long as you know what you’re mowing.
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post #13 of 14 Old 07-02-2019, 07:06 AM
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Re: New to me flail mower

Quote:
Originally Posted by Gravely1961 View Post
Iím not sure. The man I bought it from had purchased a lot from a tree farm. Today I lowered the cut from 4Ē to about 2.5 it is the sweet spot in my view so long as you know what youíre mowing.


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post #14 of 14 Old 07-08-2019, 07:14 AM
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Re: New to me flail mower

I've been thinking about a flail mower for my GMT 9000.... I have some VERY long grass that needs mowed, and the finish deck really doesn't care for the long stuff. Wraps around the spindles, and jams the blades. (which then eats the belt.....) One thing I have seen a LOT of conflicting information on is: Horsepower vs width. The LI is what? 8 horsepower or so? How wide is the flail mower that you put on there??
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