Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?)

   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?) #1  

Lee Robinson

Bronze Member
Joined
Dec 15, 2021
Messages
84
Location
Brandon, MS
Tractor
Kioti CK2610 HST
EDIT: I don't wish for the conversation to be misleading...so I came back here to put in the beginning the RESTRICTION SIZE I ended up with finding the most beneficial after further testing... For extension/contraction: 0.045" (3/63") and for the tilt: 0.031" (1/32")

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Below is the original conversation unedited, showing the course of my attempts to this final resolution.
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New to the forum. Joined because I have a few questions.

I got this mower and it seems to be working great. Assembly was no problem...cuts great. Tractor being used is a 2018 Kioti CK2610 HST w/ front end loader (I never remove the loader).

Now to my question...I would like to add some type of flow restriction on my rear remotes. I do not have a preference of adding it on either the tractor side of the connector or just on the flail mower hoses...for while I really need it for the flail mower, but I don't see why slowing the flow in the rear remotes would hinder the use on the other items I might use the remotes with (top-link is the only other item at this time, but I have to remove that when using the flail mower since I only have two rear remotes and both are required when using the flail mower). While it is easy to control the movement of the mower in and out and tilt when paying close attention and when at idle, when you push the RPMs up to operating speeds and are in "work mode" mindset instead of baby sit the controls mode...I do catch myself moving it faster than I would like...which can make it jerky and I am sure overtime would be hard on the three point stabilizer arms and mounts. I have the drop pin type of stabilizers and in the past I have seen a few mounting bolts get bent where they connect the stabilizer arms to the tractor mounts when heavy implements such as a rotary cutter sway side to side...and I want to do what I can to prevent such abuse since I am sure it can be easily prevented. After using this flail mower a few times and being very happy with the results, I gave the rotary cutter to my brother-in-law...and just want to get this thing dialed in for long term use on my set up.

My questions...(I bold texted my two most important questions).

1. What size "in-line" restriction orifice should I use to have great control on extension/retraction and also the tilt features of the flail mower? I see restrictors online with orifices sizes ranging from 1/8", 1/16", and 1/32" sizes. Is this the right approach? I would rather not have a dial adjustment. I want one that is "set and forget" type as long as it is not going to be harsh on the pump or oil. While the tractor has a pressure release valve, I don't want to constantly rely on that due to excess restriction...and I also don't want the oil to overheat from excess restriction.

2. I have seen some people talk about what I concluded to be some type of bypass flow hose for various applications to limit flow? I am not sure if I misread that, but honestly, I don't understand why that would be helpful or beneficial if an in-line restrictor works properly and isn't abusive to the pump or oil temperatures.

3. I have also noticed when the flail mower is fully extended out to the right, the PTO shaft can contact the pivot joint where one of the swing arms mounts to the three point frame. This has not been a problem as I noticed it before allowing it to make contact under use...but I would like to address that before I forget and swing it out while in use and end up ruining a drive shaft (especially if someone else is operating it). Honestly, I am surprised to see that the design allowed this...but it is what it is. So...I did some research and have seen some mention adding a PTO extension forward of the U-joint of the PTO shaft (on the tractor side) would move the PTO drive shaft itself further out from the swing arm pivot joint of the mower providing additional clearance when the mower is offset, but this will also increase the operating angle in the shaft's U-joint...so, I would like to know, how much angle at a U-joint is too much angle?

4. How difficult would it be to add a third rear remote so I wouldn't have to remove my hydraulic top link when using the flail mower?

Thanks.
 

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   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?)
  • Thread Starter
#2  
I will make a proper review after I make the mods. But here is a look at how it cut around my pond despite wet conditions.

 
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   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?) #3  
I suggest getting an adjustable restrictor valve (or two of them) instead of the orifice, and put them on the tractor side. Then they will be useful for all your implements. They make one way (free flow the other direction) and two way valves.

You can get a PTO extender but be aware that it will put more force on the PTO bearings in the transmission. Running the implement's shaft into the hitch is also going to do that, so it's probably better to use the extender.

Many people on this forum have made their own kit for additional 3rd fuction valves. You need to be able to fabricate a couple brackets and connect hoses.
 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?)
  • Thread Starter
#4  
Many people on this forum have made their own kit for additional 3rd fuction valves. You need to be able to fabricate a couple brackets and connect hoses.
Can you share a link to such conversation/topic?
 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?) #5  
You probably are using 2" cylinders that you want to slow up. For your purpose (small and slow adjustments), I would recommend starting no larger than the 1/32 orifice. On hydraulics, you can install restrictors on either end of the cylinder. Being that the rod-less end of the cylinder moves more oil for every inch of travel, it will restrict it more than on the rod end. They are very easy to drill larger if you want it faster.
 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?) #6  
I have the 165 version on my ck3510 with a cab and have noticed some of the same behaviors you have.

I also remove my hydraulic top link to use the mower, I was looking at the summit hydraulic multipliers to get a few more ports back there, it looks like it would fit pretty well where the tool box is but I'm not sure if I'm up for that project yet.

I've found if you ever so slightly open the remotes it is not so jerky, I will most likely get some adjustable restrictors before next spring. Also yes at full extension the pto shaft does contact on mine as well, have to keep an eye on it when making adjustments.
 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?)
  • Thread Starter
#8  
You probably are using 2" cylinders that you want to slow up. For your purpose (small and slow adjustments), I would recommend starting no larger than the 1/32 orifice. On hydraulics, you can install restrictors on either end of the cylinder. Being that the rod-less end of the cylinder moves more oil for every inch of travel, it will restrict it more than on the rod end. They are very easy to drill larger if you want it faster.
Thanks.

Is it wrong to put one on each of the four lines...both the to and fro lines? For two pistons that would mean having a total of four restrictors? I ask because I am not sure which to install it on and the 1/32nd is available at tractor supply and they only cost about $8 at tractor supply...that is assuming this is the right product.

 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?) #9  
A restrictor works on either side of the cylinder. Putting one on each side does nothing more than putting ONE on the rodless side. Restrictors restrict flow and the most flow of fluid in/out of the cylinder is on the rodless side. When drilling bigger, always figure the area of the hole and the percent bigger you are drilling it. (eg: slightly bigger will make a HUGE difference)
 
   / Mod question for BETSTCO FH-AGL-145 flail mower...(flow restrictor? PTO extension?)
  • Thread Starter
#10  
A restrictor works on either side of the cylinder. Putting one on each side does nothing more than putting ONE on the rodless side. Restrictors restrict flow and the most flow of fluid in/out of the cylinder is on the rodless side. When drilling bigger, always figure the area of the hole and the percent bigger you are drilling it. (eg: slightly bigger will make a HUGE difference)
Thank you. I understand area is not linear, but squared...and goes up quickly as one increases size. Thank you also for letting me know I only need to install one on the rodless side of each cylinder (one on the tilt and one on the swing arm). The hose connections are only about an inch apart on the cylinder, but I assume the one I marked "this line" is the line you are referring to...but then attach the restriction not "here" but on the same line where it connects to the quick connect on the rear remotes?

Correct? Excuse my elementary questions. I just want to be 100% sure I do it right. Thank you.
 

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