Im currently in the process of building a harleyrake for my takeuchi TL130 and looking at purchasing a hydraulic motor to power it. However i'm having trouble making the correct choice. The rake Im replicating is the mx7 and it uses a char-lynn 109-1118 or 109-1117 motor. My setup if pretty close except I'm running a 65" drum instead of 72". I'm looking at surplus center and baileys at different motors thats comparable but having a tough time choosing the one I need since I know nothing about hydraulic motors. Can someone recommend a good quality comparable motor that would work with my application?
Help choosing motor
- Thread starter zmnypit
- Start date
- Views: 8825
Stonehaller
Platinum Member
I saw your earlier post in the build it yourself forum. The Char-Lynn 109-1118 motor is rated for 25 GPM, 3000 psi, 705 lb-ft torque. Auxiliary hydraulics on your TL130 is 18 GPM at just under 3000 psi. At 25 GPM the Char-Lynn motor velocity is about 385 RPM. At 18 GPM you will only get 277 RPM which should be fine. The MX7 uses a 1:1 chain ratio so the roller turns at the motor RPM. My T6 Harley rake has a 2:1 gear box, so at 540 PTO speed the roller runs at 270 RPM.
I think the 16 cu. in. Ross motor you picked out in the other forum is too small. It is rated for only 1300 PSI continuously and 1850 psi momentarily. You would need relief valves to protect the motor and it does not have enough torque for normal operation. Same problem with the 107-1015 Char-Lynn motor.
My L39 is rated 30.5 PTO HP which is about 297 lb-ft of torque at 540 RPM. With the 2:1 gear box, max torque at the roller is almost 600 lb-ft. The Ross motor you picked out is only rated 220 lb-ft and the 107-1015 Char-Lynn is rated 250 lb-ft so I think the torque would be too low. Both motors are also rated for lower max speed and that will affect rake performance as well. My L39 seems to have plenty of power for the 72" T6 rake so you probably do not need as large of motor as the 109-1118, but you should get something a bigger than either of the two you picked out.
Perhaps something like the one below. It can handle your peak pressure. Rated torque is 6250 in-lbs (520 lb-ft). With your 18 GPM flow, max RPM would be 260 RPM. If you plan on using a chain drive like the MX7 and mounting a sprocket on the motor shaft, check with the supplier to make sure the motor can handle the chain load.
15.9 cu in WHITE DRIVE PRODUCTS 43
W312 AAAAA HYDRAULIC MOTOR
I think the 16 cu. in. Ross motor you picked out in the other forum is too small. It is rated for only 1300 PSI continuously and 1850 psi momentarily. You would need relief valves to protect the motor and it does not have enough torque for normal operation. Same problem with the 107-1015 Char-Lynn motor.
My L39 is rated 30.5 PTO HP which is about 297 lb-ft of torque at 540 RPM. With the 2:1 gear box, max torque at the roller is almost 600 lb-ft. The Ross motor you picked out is only rated 220 lb-ft and the 107-1015 Char-Lynn is rated 250 lb-ft so I think the torque would be too low. Both motors are also rated for lower max speed and that will affect rake performance as well. My L39 seems to have plenty of power for the 72" T6 rake so you probably do not need as large of motor as the 109-1118, but you should get something a bigger than either of the two you picked out.
Perhaps something like the one below. It can handle your peak pressure. Rated torque is 6250 in-lbs (520 lb-ft). With your 18 GPM flow, max RPM would be 260 RPM. If you plan on using a chain drive like the MX7 and mounting a sprocket on the motor shaft, check with the supplier to make sure the motor can handle the chain load.
15.9 cu in WHITE DRIVE PRODUCTS 43
W312 AAAAA HYDRAULIC MOTORThank you for the info I now have a better picture of what I need. I do plan on using a chain drive so the way that one mounts I'm not sure I can make it work.There's also this one: 11.89 CU IN EATON BEARINGLESS HYDRAULIC MOTOR M 212AD AA
F Its down a little in torque though.
bigdeano
Platinum Member
Don't buy a bearingless motor. It has no output shaft or bearing. You can't use it for anything but a paper weight.
Got it. Thanks for the heads up. Is there a website that I can input all my gpm, psi, desired rpm/tq and see a list of motors?
bigdeano
Platinum Member
Not that I know of. You just have to go through the catalogs. It's kind of a daunting task. An Eaton Char-Lynn 2000 series motor will do what you need. I would suggest a 104-1027, which has a 14.9 cu in displacement and 1-1/4 dia keyed shaft with tapered roller bearings to handle the side load. It's about the same capacity as the series 4000 motor you mentioned in your first post. They sell aftermarket ones on ebay for 285, still kind of pricey though.
I know thats right. I've been looking since last Friday. I've found aftermarket 109-1118's for $500 so $285 sounds much better. The two bolt mount wont be an issue? Also the 104-1027 has a max rpm of 295.
bigdeano
Platinum Member
Actually, after looking at the chart I see the 104-1027 won't handle 3000 psi at 18 gpm. You'd have to use a smaller displacement like 9.6 and get the speed you want by changing the chain reduction ratio. I would think the 2 bolt mount would be fine.
Why not? Char-Lynn Brand 2000-Series Low Speed, High Torque Hydraulic Motors
104-1027 2 Bolt A Flange, 1-1/4 Inch Keyed Shaft, SAE-10 Ports
Displacement
(Cu In)
14.9
Max Continuous
Pressure (PSI)
3000
Torque (in-lb) @ Max
Continuous Pressure
5850
Max Continuous
Flow (GPM)
20
Max RPM @
Max Cont. Flow
295
If I go the 104-1026 then I lose torque. See, I just cant win lol.
bigdeano
Platinum Member
You have to look at their chart. There's a pressure limitation on the larger displacement motors. You can get the torque back by changing the chain reduction ratio.
Here's their literature.
http://www.eaton.com/ecm/groups/public/@pub/@eaton/@hyd/documents/content/pll_1323.pdf
look at pages 122 and 123 The 9.6 cu in can handle 3000 psi. at 18 gpm.
Here's their literature.
http://www.eaton.com/ecm/groups/public/@pub/@eaton/@hyd/documents/content/pll_1323.pdf
look at pages 122 and 123 The 9.6 cu in can handle 3000 psi. at 18 gpm.
Last edited: