PTO= 540rpms

[GolfGolf]

Farntrac 535 King Kutter bush Hog

According to my operator's manual it says to rev up the engine to 1800 rpms before engaging the PTO.

Does this mean I need to operate the tractor at 1800 the entire time I am using my bush hog (or anything else utilizing the PTO)?

I know this may seem a silly question to all you oldtimers but I am trying to understand this machine.

I need to put the tractor into a lower gear so that I don't go too fast while using the bush hog.


Thanks
Gary

 

[RalphVa]

They probably advise revving to 1800 rpm when engaging the PTO to keep the engine from dying from the load. I generally have to rev my engine to about 1500 rpm to keep the PTO from killing it. THEN I rev it up to the indicated PTO speed, which on my tractor is about 3,000 rpm, before actually using the bush hog. Otherwise, your engine won't have enough hp to overcome a sudden severe load, or you won't be able to go very fast while bush hogging. You also run the risk of not having enough oil flow to the engine bearings. This will cause them to prematurely fail.

Ralph

 

[Negligence]

Yes, you need to maintain RPM's that put you around the 540 PTO speed. You don't have to be exact, but should be close.

 

[tydp]

I only engage the PTO at idle to reduce shock loads to tractors and equipment. Then rev tractor to RPMs needed to run equipment. Personally, I rarely have to run at "PTO speed" to get desired results. Your results may vary....

 

[john_bud]

You want to feather in the implement, or you can do damage to the PTO. I don't know the type of PTO in your tractor, but the lowest speed that does not kill the engine is the easiest on the mechanism. Then slowly increase the engine rpm until the 540 pto speed is reached. That speed is normally marked on the tachometer with a line, arrow or even "540" or "PTO".

jb

 

[flusher]

Farntrac 535 King Kutter bush Hog

According to my operator's manual it says to rev up the engine to 1800 rpms before engaging the PTO.

Does this mean I need to operate the tractor at 1800 the entire time I am using my bush hog (or anything else utilizing the PTO)?

I know this may seem a silly question to all you oldtimers but I am trying to understand this machine.

I need to put the tractor into a lower gear so that I don't go too fast while using the bush hog.


Thanks
Gary

What's the engine rpm that's required to produce 540 rpm at the pto?

For example, my Mahindra 5525 (54 hp engine, 45 hp pto) produces 540 pto rpm at 2060 engine rpm.

When I use my 6-ft Hawkline brush hog, I engage the pto clutch with the engine at 1300 rpm or so and then rev up to 2060 rpm if I want to run the mower at 540 pto rpm.

 

[jinman]

Gary, I"m not sure what type of PTO the Farmtrac has. Is it electrically engaged with a switch or mechanically engaged with a lever? Is it an independent PTO that operates whether the clutch is depressed or not? Can you engage the PTO with the clutch depressed and then slowly release your clutch?

There are several different types of PTOs and knowing exactly what type your Farmtrac has is important for the best answer.

 

[Mickey_Fx]

I only engage the PTO at idle to reduce shock loads to tractors and equipment. Then rev tractor to RPMs needed to run equipment. Personally, I rarely have to run at "PTO speed" to get desired results. Your results may vary....

I second this approach and is how I've done things for yrs.

 

[Spaceman]

They probably advise revving to 1800 rpm when engaging the PTO to keep the engine from dying from the load. I generally have to rev my engine to about 1500 rpm to keep the PTO from killing it. THEN I rev it up to the indicated PTO speed, which on my tractor is about 3,000 rpm, before actually using the bush hog. Otherwise, your engine won't have enough hp to overcome a sudden severe load, or you won't be able to go very fast while bush hogging. You also run the risk of not having enough oil flow to the engine bearings. This will cause them to prematurely fail.

Ralph

Not enough oil to the engine bearings? I was under the impression the oil pump provided enough pressure/flow throughout it's rpm range. Do I need to maintain a minimum rpm even when just idling? I would hate to lose my first tractor/favorite toy!

 

[ChrsDrn]

spaceman,
it is never good to overload a deisel engine. engines produce more hp the faster they turn. your tractor will only produce its rated HP at its rated PTO speed. if what you are doing for work requires less than full HP you can run your engine slower. for instance you are doing virtually no work when idleing therefore you need little HP.
Chris

 

[pitt_md]

You do not have to run at "PTO Speed". It's a good idea to not over load the engine though. I personally do not like reving the engine to max RPM's when it's not required.

 

[ccsial]

What's the engine rpm that's required to produce 540 rpm at the pto?

There is usually a mark on the tach for 540 PTO speed.

I also engage my PTO very slowly at idle and then slowly ( about 5 seconds) bring it to PTO speed.

 

[Happyman]

I also go for the "feather the PTO in" process. At about 1500 RPM I SLOWLY engage the PTO until fully engaged. Then I raise the throttle until my dash gauge reads 540 PTO (Grand L 3940 digital dash readout).
Then it's "turn and burn"

 

[JohnDeere4300]

When using a bush-hog, i have my throttle as low as it will go when i turn on the PTO.

Then i will slowly increase the throttle to the RPMS that are needed for the job. If i am cutting tall grass then i will run my RPMS in the 540 mark.

If i am cutting short grass, weeds etc... i will run slower RPMS as long as its getting the job done.

 

[kenmac]

I always run mine at 540 RPM no matter what.. I enguage mine at idle or 300-500 engine RPM'S

 

[Oldmax]

If you want to shorten the life of a deisel engine run it at a lower speed that is designed to run . Will not hurt to run engine at speed the PTO is designed to run . Is realy better for it keeps colling fan and engine oil working . These engines tend to over heat when pulling a load at lower RPM's. Also the emplement is designed to work at that RPM and it will NOT do a good job at a lower RPM. If you are going to fast in the gear drop one.

 

[pat32rf]

On my JD4300HST when you pull the PTO lever it INSTANTLY engages, no way to do it gently. The same when you disengage. I normally pull the lever at idle then rev it up.
My old Bota had a two speed PTO so I could run the mower at a high speed but lower engine speed if the load was light. I could also use the clutch to engage/disengage the PTO, even though it also had HST

 

[Brad_Blazer]

Especially with a "bush hog" you need to engage the PTO at a low speed or the blades will backspin and clack together when the carrier starts turning.

 

[JohnDeere4300]

Especially with a "bush hog" you need to engage the PTO at a low speed or the blades will backspin and clack together when the carrier starts turning.

I have had mine go together, and have to find a place where i could back up with the bush hog hanging over a bank, so i could see under it better, then try to get them loose.

 

[Predator]

It is a good idea to lower the engine rpm and let the clutch out slooooowly when engaging the PTO, or you may break the shear pin....don't ask me how I know.