PTO driven generator

[RonJ]

I have a Yanmar 1700D and would like to mount a generator powered by the pto. The generator needs to be driven at 1800 rpm. I'd like to use belt and pulleys to increase the pto's 540 rpm. Will someone point me to a web page that will help figure out the correct size pulleys needed? Any advice, recommendations etc. are welcome. Thanks.

 

[Baby Grand]

Try this one for a start:
Pulley Calculator. RPM, Belt Length, Speed, Animated Diagrams

 

[Baby Grand]

For some reason I cannot edit my first post - Try this one for a start:
https://www.engineersedge.com/vee_flat_belt_menu.shtml

 

[RonJ]

Thanks for the info. Looks like the first will do it.

 

[buickanddeere]

Cheaper to just purchase the gearbox from eBay. Don't skimp on the shielding around rotating parts.

 

[Industrial Toys]

Just a word of advice. I used to run a 15 KW PTO set with my JD 770 (Yanmar). Worked very well, albeit the tractor screaming away at FULL RPM. Thought I could use a 2:1 gearbox and run the tractor at half RPM. Many times during a power outage you only need a few hundred watts. Anyway, the tractor would not even run that thing in that configuration with no load at all on the genset. Guess it was just out of its power band.

 

[zzvyb6]

Just a word of advice. I used to run a 15 KW PTO set with my JD 770. Worked very well, albeit the tractor screaming away at FULL RPM. Thought I could use a 2:1 gearbox and run the tractor at half RPM. Many times during a power outage you only need a few hundred watts. Anyway, the tractor would not even run that thing in that configuration with no load at all on the genset. Guess it was just out of its power band.

The reason to run the tractor engine at rated rpm is to provide sufficient angular momentum to the generator when a large electrical starting load is applied. Run it just slightly below the peak torque rpm. That gives the governor the best accelerating control as needed. The motor was designed to run at rated rpm, too. For mechanical durability (motor mounts too) as well as fuel economy.

 

[Soundguy]

get a gear increaser set. many heads are 3600 rpm and simply have a 540-3600 box. you can get them for whatever poles you need. ( 540-1800, etc. )

better than belts, IMHO.

 

[buickanddeere]

The absolute max continuous load that Yanmar can drive is 12Kw .

PTO Drive Gearbox FOR Generators 80HP 540 RPM TO 1800 RPM 1 TO 3 5 Ratio | eBay

If the tractor is way over sized over the generator then consider PTO Drive Gearbox FOR Generators 450 RPM TO 1800 RPM 1 4 Speed Increase | eBay

 

[Soundguy]

I think 12kw will be stiff on a 1700.. I moved my Gen off my 1700 to an 8n ( then a 660 ) for continuous high load. Extra hp and flywheel handled large starts better