Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
</font><font color="blue" class="small">( and a 6 foot mower with the same results- NOTHING! It makes no difference to the newer tractors. Ken )</font>
Please... a 6' mower on that beast of a tractor.. Of course the ac doesn't make a difference.. you have no load ont he tractor. My 1975 ford 5000 with 67 pto hp pulls a 10' mower... that's a load.
I'ts likely you could drain off 20-30 hp for a pto device, plus lots of other parasytical hp requirements and STILL not notice a drop in enggine rpm.. that's what your governor is for.
You set your hand throttle.. that selects and rpm range, as you add load, your governor tries to maintain that rpm level. Untill you get to a point where more throttle does not produce more rpm ( lugging the engine ) you have 'reserve' hp available.
It's a simple supply and demand issue.. the engine is the supply.. the loads are the demand.. the commodity is HP. If you have 65 pto hp available, and have implement, and drivetrain loads that take 40 hp.. you have 25 hp reserve left over.. kick out? 2-4 hp for the ac.. and you still have reserve hp. etc...
Small hp drains won't be an issue unless you are running at or near max load...
My 12.5 kw genny .. when I have it hooke dto my NH 7610s.. nothing changes on the tractor tach whether I'm using a 120w lamp.. or a 10a skill saw.... since I may only be using up to 24 pto hp, and I have ? 66 or so left over.. its not a load over capacity issue...
Soundguy
Please... a 6' mower on that beast of a tractor.. Of course the ac doesn't make a difference.. you have no load ont he tractor. My 1975 ford 5000 with 67 pto hp pulls a 10' mower... that's a load.
I'ts likely you could drain off 20-30 hp for a pto device, plus lots of other parasytical hp requirements and STILL not notice a drop in enggine rpm.. that's what your governor is for.
You set your hand throttle.. that selects and rpm range, as you add load, your governor tries to maintain that rpm level. Untill you get to a point where more throttle does not produce more rpm ( lugging the engine ) you have 'reserve' hp available.
It's a simple supply and demand issue.. the engine is the supply.. the loads are the demand.. the commodity is HP. If you have 65 pto hp available, and have implement, and drivetrain loads that take 40 hp.. you have 25 hp reserve left over.. kick out? 2-4 hp for the ac.. and you still have reserve hp. etc...
Small hp drains won't be an issue unless you are running at or near max load...
My 12.5 kw genny .. when I have it hooke dto my NH 7610s.. nothing changes on the tractor tach whether I'm using a 120w lamp.. or a 10a skill saw.... since I may only be using up to 24 pto hp, and I have ? 66 or so left over.. its not a load over capacity issue...
Soundguy