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MELVIN MYERS
New member
Username: Memco
Post Number: 1
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 15, 2006 - 10:15 am: | 
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Hello, new to this site but excited to be able to find people willing to think and work with their hands.
I am looking to convert my 4 wheel drive 4 wheel steer COOT to hydrostatic drive by replacing the toqure converter and transmission with a hydrastatic pump and a hydraulic motor.
The only thing i am missing is the knowlege to size the pump and motor correctly.
I will be using a 23 hp vanguard for the power supply, and can do all the fabrication,installation, and design of brackets, but have looked and tried to size the hydraulic system and have come up short.
If anyone has the knowlege or knows someone who is willing to help it would be a big help. I have found form for figuring this out but they are over my head.
I would be wiling to keep a log and post it here of the project and help anyone trying to do the same.
Thanks
Melvin Myers
memco@cox.net
Denham Springs, La. |
philip w.cox
Advanced Member
Username: Philipatmaxfour
Post Number: 223
Registered: 01-2005
Posted From: 216.209.98.96
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 15, 2006 - 07:18 pm: |
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Hi Melvin, There are a bunch of companies building "zero turn" lawn mowers these days. Some are powered by your exact engine. residential models I have seen, use as small as 17 horse Briggs, but some industrial models have BIG engines. I wonder if looking at these machines would help you decide what pumps etc. to use. |
MELVIN MYERS
New member
Username: Memco
Post Number: 2
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 15, 2006 - 09:14 pm: |
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Philip
Thanks for the answer, I have found that most of the zero turn use the smaller and less heavy duty type of hydrostatic drive. when geared up to give about 20 mph they don't have the power to drive the machine.
I,ll try to past a photo of what I am trying to convert.
also most of the mowers use one per side so they are only carrying 1/2 the load, when you just use one it is overloaded... just my backyard engineering ???
Still keep thinking
THANKS
Melvin |
MELVIN MYERS
New member
Username: Memco
Post Number: 3
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 15, 2006 - 09:27 pm: |
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TRying to post photos |
Marc Stobinski
Member
Username: Jerseybigfoot
Post Number: 20
Registered: 06-2000
Posted From: 68.193.116.132
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 15, 2006 - 10:23 pm: |
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You will need to start with the calculations. http://www.hydraulicsupermarket.com/upload/db_documents_doc_11.pdf has the calculations. |
Eddie L. Beddingfield
Junior Member
Username: Argo2003
Post Number: 19
Registered: 08-2006
Posted From: 152.163.100.65
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 16, 2006 - 11:11 am: |
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Melvin,You could try the Coot 2 people in Fairbury,the new ones are hydro drive and I think they could get you the info you need for a older machine.The only thing I see is the engine may be a little small compared to the other hydro atv's out there.Hydro will use power and you also have a pretty big tire.You may want to check out Hydrotrax and Predator machines for their hydro combination also. Eddie |
Eddie L. Beddingfield
Member
Username: Argo2003
Post Number: 20
Registered: 08-2006
Posted From: 152.163.100.65
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 16, 2006 - 11:14 am: |
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You may also research the older Traxter machines ,they were hydro drive and probably comparable to the weight of your Coot.Eddie |
MELVIN MYERS
New member
Username: Memco
Post Number: 4
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 16, 2006 - 09:23 pm: |
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Hey Thanks for the input,
I will look at both ways.
Keep the help comming , this is the most suggestions I have ever had.
Have lots of photos of it in the trails and swimming in the water if anyone is instered.
Melvin |
philip w.cox
Advanced Member
Username: Philipatmaxfour
Post Number: 224
Registered: 01-2005
Posted From: 64.228.3.119
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 16, 2006 - 09:59 pm: |
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You bet we like photos Melvin. Those look like 26" max iv wheels? Show us a pic. of it swimming if you can. Eddie is absolutely right (for a change)and the machines that he mentioned can be reached as links from this site. |
Marc Stobinski
Member
Username: Jerseybigfoot
Post Number: 21
Registered: 06-2000
Posted From: 68.193.116.132
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 17, 2006 - 06:36 pm: |
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The Coot2 has 4 wheel motors and variable Hydraulic pump. I think they also have the hydraulic circuit setup to 2 wheel or 4 wheel drive. In 2 wheel drive you can supply additional oil to 2 motors to obtain higher ground speed. If you plan to use hydrostatics for replacing the weak coot transmission the cost will be considerably less than the wheel-motor route. |
MELVIN MYERS
New member
Username: Memco
Post Number: 5
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 19, 2006 - 10:01 pm: |
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Lost my coot swimming photos, will look for them this weekend, and if I cannot find them will go the first part of next week and take some more.
Mel  |
MELVIN MYERS
New member
Username: Memco
Post Number: 6
Registered: 10-2006
Posted From: 70.180.44.236
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 22, 2006 - 09:07 pm: |
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Found the photos of the COOT "SWIMMING"
Sent them to richard to see if he would put them in the photo section, KEEP LOOKING
Mel
Just a sample.  |
philip w.cox
Advanced Member
Username: Philipatmaxfour
Post Number: 228
Registered: 01-2005
Posted From: 216.208.194.53
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 24, 2006 - 10:40 pm: |
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Great pictures Mel. I assume your swimming Coot stops traffic W. Philip |
larry wood
New member
Username: Lawpressman
Post Number: 2
Registered: 04-2005
Posted From: 64.12.116.199
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 26, 2006 - 06:25 pm: |
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Melvin, just buy a Case lawn tractor I think it is a 446 and use the Hyd. motor and pump from it in your coot. good luck larry |
Chuck McGhee
Intermediate Member
Username: Chuck_050382
Post Number: 93
Registered: 01-2006
Posted From: 12.170.193.98
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 27, 2006 - 08:23 am: |
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Case 444 and 446 used Hyd. pumps |
Robert Stanfield
New member
Username: Goldhunter_2
Post Number: 1
Registered: 11-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, November 09, 2007 - 04:36 pm: |
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test |
John McNerney
New member
Username: John_mc
Post Number: 1
Registered: 12-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 09, 2009 - 11:22 am: |
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Would the hydrostatic transmission from a Craftsman Garden tractor work, or is it not beefy enough? Most of these are belt drive of the engine. I haven't looked closely yet, but I believe they have the hydraulic pump and transmission built into one unit. I'm guessing the speed reduction ratio might be too great... mine is already geared down to spin a 23 or 24" garden tractor tire at a much slower speed than a coot travels. |
Dave Evans
Advanced Member
Username: Dozer
Post Number: 163
Registered: 01-2001
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 09, 2009 - 03:10 pm: |
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John
Sounds like a interesting project, I think it may work since the COOT is geared so low. Take some photos and let us know what you do
See you
Dave Evans |
John McNerney
New member
Username: John_mc
Post Number: 2
Registered: 12-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 21, 2010 - 04:19 pm: |
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The output of the hydrostatic transaxle on my Craftsman garden tractor probably only turns slightly over 100 RPM max. (assuming a WAG max ground speed of 7.5 MPH with the 24" rear wheels)
The Torque transmitter (worm & ring gear which drives the axles) has 15:1 reduction. so now we're down to about 7 RPM.
Put another way, I'd be replacing a transmission which has close to a 1:1 reduction (in high gear), with one that has reduction of something like 35:1 (I don't know the belt drive ratio, but it's not huge).
Without an easy way to get around some of that reduction, I don't see how a typical lawn mower hydrostatic transaxle will work - unless there is some gear reduction which can be easily bypassed. |
noel talley
New member
Username: Kc5dil1225
Post Number: 1
Registered: 01-2017
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 28, 2017 - 12:16 am: |
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I have a hustler ztr. pull logs boats have a push blade on it. it is hydraulic drive. thinking of using the hustler drive to convert my bigfoot argo. |
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