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ccsial 08-11-2019 02:50 PM

Sluggish PTO on X748
 
I noticed the last two time Iíve mowed the first time I engage the PTO there was a long delay (3 or 4 seconds) before it engaged. I wonder if something is sticking in the PTO. About a month ago I hit a stump and bent a blade and killed the engine. I wonder if this could have caused a PTO problem. My 2012 X748 has 720 hours now.

Anyone experience this type of problem?

830King 08-11-2019 03:00 PM

Re: Sluggish PTO on X748
 
My x475 has a few second delay when turning on the pto switch also. I think that's normal

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ccsial 08-11-2019 03:13 PM

Re: Sluggish PTO on X748
 
Thanks, Once it is warmed up the delay is gone. Cold fluid I suppose. But I don't remember it taking this long before the last few weeks.

830King 08-11-2019 05:30 PM

Re: Sluggish PTO on X748
 
I guess I never payed any attention to if it takes longer while cold or hot. Next time I use it I'll try to remember to watch and then try to remember to report back my findings.

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KHodges 08-12-2019 01:39 AM

Re: Sluggish PTO on X748
 
Quote:

Originally Posted by ccsial (Post 12324505)
I noticed the last two time Iíve mowed the first time I engage the PTO there was a long delay (3 or 4 seconds) before it engaged. I wonder if something is sticking in the PTO. About a month ago I hit a stump and bent a blade and killed the engine. I wonder if this could have caused a PTO problem. My 2012 X748 has 720 hours now.

Anyone experience this type of problem?

Are you at full throttle when you engage it? Mine is like: pull switch-one Mississippi, PTO starts turning, 2-Mississippi, it's full speed.

eKretz 08-12-2019 06:43 AM

24 Attachment(s)
Quote:

Originally Posted by KHodges (Post 12324841)
Quote:

Originally Posted by ccsial (Post 12324505)
I noticed the last two time I’ve mowed the first time I engage the PTO there was a long delay (3 or 4 seconds) before it engaged. I wonder if something is sticking in the PTO. About a month ago I hit a stump and bent a blade and killed the engine. I wonder if this could have caused a PTO problem. My 2012 X748 has 720 hours now.

Anyone experience this type of problem?

Are you at full throttle when you engage it? Mine is like: pull switch-one Mississippi, PTO starts turning, 2-Mississippi, it's full speed.

Same here for my x595. It's always been that way, cold or hot. As soon as the switch is pulled the engine lugs down for a split second then recovers back to full speed within another second. And I've been mowing that large massively overgrown 25 acre field I mentioned in another thread for the last week - there have been several "surprise" ~2" diameter invisible tree trunks under the foliage that have stopped the blades cold and stalled the engine. (And one 3/8" steel cable!) No bent blades, no PTO issues. The photo shows some of the crazy crap I'm mowing down. That foliage to the left of the tractor is what I'm mowing in that section of the field, it is not the edge of the field. Really wish I had a brush hog. Attachment 2390543

ccsial 08-12-2019 06:49 AM

Re: Sluggish PTO on X748
 
I engage at half throttle. It has never waited for 3 or 4 seconds until recently. There was always a slight delay of maybe 1 second.

I'm not sure why it takes so long on the first engage. I wonder if sitting for a week it is sticking a bit and after the first time it then engages normally.

I had another thought. There must be a solenoid valve to engage the PTO. The spool could be getting sticky. I wonder if that valve is an integral part of the solenoid. It is probably not easy (expensive) to replace

tractorPete 08-12-2019 07:25 AM

Re: Sluggish PTO on X748
 
Did you check hydraulic fluid level?

wirlybird 08-12-2019 07:35 AM

Re: Sluggish PTO on X748
 
My X585 always has had a little delay after pulling the PTO lever before you can hear it start to engage.
Always engages smoothly.

ccsial 08-12-2019 07:45 AM

Re: Sluggish PTO on X748
 
Quote:

Originally Posted by tractorPete (Post 12324905)
Did you check hydraulic fluid level?

Fluid level is good. The fluid and filters have always been changed on JD's schedule with JD parts and fluid.

mrbeef 08-12-2019 08:14 AM

Re: Sluggish PTO on X748
 
Quote:

Originally Posted by ccsial (Post 12324927)
Fluid level is good. The fluid and filters have always been changed on JD's schedule with JD parts and fluid.

Fluid level was my first guess when I read the original post. My X748 has about a 2 second delay on the deck, yet the delay on the hydro tiller is less than 1 second. Maybe check the solenoid on the back of the machine and make sure it is still good and tight. If nothing is too apparent and the deck is working like it should when it is on I would say monitor the times and if they get worse then dig deeper.

ccsial 08-12-2019 11:19 AM

Re: Sluggish PTO on X748
 
Quote:

Originally Posted by mrbeef (Post 12324949)
Fluid level was my first guess when I read the original post. My X748 has about a 2 second delay on the deck, yet the delay on the hydro tiller is less than 1 second. Maybe check the solenoid on the back of the machine and make sure it is still good and tight. If nothing is too apparent and the deck is working like it should when it is on I would say monitor the times and if they get worse then dig deeper.

Good plan.

Wags54 08-15-2019 04:18 PM

Re: Sluggish PTO on X748
 
On my X534 the manual says to engage only at full throttle. I verified this with the dealer also.

ccsial 08-15-2019 07:32 PM

Re: Sluggish PTO on X748
 
I know that is correct, but the diesel has so much torque half throttle works fine. I figure it is easier on the PTO. I disengae at half throttle too as I figure it is easier on the PTO brake. Maybe I'm wrong about it but I've been doing it for over 10 years.

eKretz 08-15-2019 10:02 PM

On a diesel it doesn't matter. I've engaged my mower blades at idle with no issue. On a gasoline engine you'll stall it.


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