Sportsman762
Platinum Member
- Joined
- Mar 28, 2008
- Messages
- 889
The Kubota M5660 has a 540E PTO as an option taking the operating engine RPM's down from 2500 to 1850 (I think). The M5660 speed at 2500 RPM is 1.6 mph so with 540E it would be 1.2 mph. The M5660 has 10.6 GPM flow on the hydraulics. If it is a 2500 PSI system then you have 15.4 hp of pto power. This is assuming that the lines going to the remotes are able to pass 10.6 GPM and that the tractor is not consuming any of the flow with steering, etc. A 120 cm Imants 27SX120R spader (I could not find your model) requires a min of 30 hp to run.
A hydraulic system that can transmit 30 hp consistently will require 20 GPM at 2500 PSI assuming now flow loss due to lines (probably have to up it to 25 gpm). You will need a tank that holds 1 gallon for every GPM and / or an oil cooler. Oil coolers are hard to keep clean in a dusty enviroment. Your tractor will have to run at 1800 RPM to produce 30 hp (56 engine, 50 pto at 2500 rpm means 6 hp loss so you need 36 engine hp to get 30 PTO)
Kubota M5660 Specs
Hydraulic HP Calculator
Imants website.
www.imants.com
Engine HP chart.
The best option as you have stated is to use what you have.
A hydraulic system that can transmit 30 hp consistently will require 20 GPM at 2500 PSI assuming now flow loss due to lines (probably have to up it to 25 gpm). You will need a tank that holds 1 gallon for every GPM and / or an oil cooler. Oil coolers are hard to keep clean in a dusty enviroment. Your tractor will have to run at 1800 RPM to produce 30 hp (56 engine, 50 pto at 2500 rpm means 6 hp loss so you need 36 engine hp to get 30 PTO)
Kubota M5660 Specs
Hydraulic HP Calculator
Horsepower Calculator - Metaris Hydraulics
Calculate the Hydraulic (fluid power) horsepower.
www.metaris.com

Spading machines - Imants
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The best option as you have stated is to use what you have.
For now I'll stick to keeping the stock set up.