Mowing Disengage PTO before idling down?

[rdsaustintx]

I throttle down my BX before doing anything with the PTO. Y'all do what ya want

 

[Dr. Bob]

The manual for my B7800 states: "To avoid shock loads to the PTO, reduce engine speed when engaging the PTO...." It says nothing about disengaging the PTO.
I know for a fact that throttling down with the PTO engaged slows my brushhog much faster than disengaging and then reducing the throttle and waiting for the blades to stop.
I always engage/disengage and low throttle.

 

[BeezFun]

Thanks for all the input, never even knew there was a pto brake. I'll keep throttling down before I disengage PTO.

 

[RickB]

Idling down does NOT help lessen the wear on the brake as others keep mentioning. There is the overrunning clutch preventing the engine from slowing down the implement.


If your tractor does not have an overrunning clutch, this does not apply. But if you didn't have one The inertia of the blades spinning would make the tractor idle down very slowly, and if in gear, will actually try to drive the tractor.

With older tractors such as the N series fords, which didnt have live hydraulics or two stage clutches, it was very easy to be pushed through fence rows and such with a bushhog, unless there was an overrunning clutch adapter.

Most tractors with independent PTO do not have internal ORC's.
Many tractors with independent PTO's do have PTO brakes. The quickest way to ruin a PTO brake is to shut off the PTO at speed with a high inertia load attached.
I want to hear from anyone who has damaged any part of their tractor by idling it down before shutting off the PTO. The notion of damage from that cause is absurd and nothing more than speculation by the uninformed.
It is impossible for an implement driven by an independent PTO to move a tractor forward by turning the transmission if the main clutch is disengaged or the hydrostatic control is moved to neutral.

 

[TripleR]

Most tractors with independent PTO do not have internal ORC's.
Many tractors with independent PTO's do have PTO brakes. The quickest way to ruin a PTO brake is to shut off the PTO at speed with a high inertia load attached.
I want to hear from anyone who has damaged any part of their tractor by idling it down before shutting off the PTO. The notion of damage from that cause is absurd and nothing more than speculation by the uninformed.
It is impossible for an implement driven by an independent PTO to move a tractor forward by turning the transmission if the main clutch is disengaged or the hydrostatic control is moved to neutral.

Do you have a link or reference source, very interesting thread. Thanks

 

[RickB]

Do you have a link or reference source, very interesting thread. Thanks

My reference source is 46 years experience operating tractors and probably 40 years of responsibility for maintaining and repairing tractors that my family and I have owned. 17 years of which have been also spent professionally repairing tractors and counseling owners on the proper operation of their machines.
I learn new stuff every day, and do not claim to know everything, but there is some real poor information in this thread.

 

[BrierPatch]

I would offer that before anyone take any advice from this thread, they first understand what type of PTO they have, and whether or not they actually do have a PTO brake.

"One Size Fits All" does not apply here. "Engage at low-to-mid rpm" is the only thing that could be said universally true of all.

X2 !! :thumbsup:

 

[TripleR]

My reference source is 46 years experience operating tractors and probably 40 years of responsibility for maintaining and repairing tractors that my family and I have owned. 17 years of which have been also spent professionally repairing tractors and counseling owners on the proper operation of their machines.
I learn new stuff every day, and do not claim to know everything, but there is some real poor information in this thread.

Thanks for the information, I would be interested in reading any information anyone has as I certainly don't want to keep doing or start doing anything that causes added stress to my equipment, Thanks

 

[easygo]

I engage all implements at idle and I slowly take back the throttle whenever I'm getting ready to disengage any implement. For example let's take a chipper. I move the throttle down a little at the time over a 20-30 second period. I can hear the chipper slowing down as the engine slows. When it is down to idle I push the clutch disengage PTO and let up the clutch. The chipper even at that low speed keeps turning for another minute or two. I imagine if I didn't throttle down it would bee spinning for a VERY long time. I prefer complete stop before raising and moving the chipper. I never hurt anything and that is the same thing I do with my mower and snowblower as well.

 

[DiezNutz]

The Bx tractors have a hydraulic clutch pack. These have several disc sets that get compressed by the hydraulic clutch cylinder. When the Pto is shut down the hydraulic flow is stopped and the clutch cylinder is pushed back by a spring and the brake disc then is compressed against the clutch and thus is braking the Pto.

True of the B2630/B3030 as well, which have independent PTO/clutch pack, and also have a PTO brake. If the brake wears out it will cause the clutch to drag, at which point I imagine continuing to operate like this would get expensive quick.