Ventrec PTO

[HC54]

Got a diesel Ventrac and after it's been running an hour or so the PTO won't kick on without some rocking
Back and forth. Any ideas on where I should look first ?

 

[murphy1244]

Got a diesel Ventrac and after it's been running an hour or so the PTO won't kick on without some rocking
Back and forth. Any ideas on where I should look first ?

What do you mean rocking? Is it new?

 

[HC54]

Not new has 1,900 hrs.
Rocking back and forth.

 

[murphy1244]

You have to go forward and back while pulling out the PTO button?

 

[HC54]

The PTO is operated by a electric switch. It works fine till it gets hot after an hour or so.
I believe it has something to do with the electric/magnetic clutch. Similar to the
AC clutch on the compressor in a car.

 

[Raw Dodge]

I would check the wiring especially the connectors for corrosion and loose connector terminals,If that checks out the switch is the easiest and cheap item to try,also safety switch at the seat will need to be checked. .the pto clutch is not cheap I'd only.buy one after you have eliminated everything else, I cant suggest this for safety reasons,but if it were me I'd run a 14 guage jumper wire right to a 20 amp fuse at the battery and power it direct and see what happens ,that will eliminate the question of whether you have a good power connection.

 

[prs]

If it is a 4500, there seems to be a recall on the early edition electronic safety switch module. I had problem with similar front PTO electro clutch on JD650 and ended up bypassing the factory wiring harness with a fused and switched circuit replacing the original.

prs

 

[John Joseph McVeigh]

I would check the wiring especially the connectors for corrosion and loose connector terminals,If that checks out the switch is the easiest and cheap item to try,also safety switch at the seat will need to be checked. .the pto clutch is not cheap I'd only.buy one after you have eliminated everything else, I cant suggest this for safety reasons,but if it were me I'd run a 14 guage jumper wire right to a 20 amp fuse at the battery and power it direct and see what happens ,that will eliminate the question of whether you have a good power connection.

It might also be necessary to provide a substitute wire/connection on the negative side. to completely eliminate the possibility of too much resistance in the current path.

 

[Raw Dodge]

It might also be necessary to provide a substitute wire/connection on the negative side. to completely eliminate the possibility of too much resistance in the current path.

Absolutely! Those clutches are pretty strong.My dealer says there rated for 75hp..not sure of that's right but it's way stronger than the B38 belt on it.

 

[HC54]

I'll check the wiring. I've been thinking it may be an issue with the magnet.

 

[RampageRick]

Got a diesel Ventrac and after it's been running an hour or so the PTO won't kick on without some rocking
Back and forth. Any ideas on where I should look first ?

Just wanted to post in case anybody else has this issue.

The friction plates in the electric clutch can wear. Procedure is to adjust the 3 spring-loaded nuts around the clutch unit. Use a .020" feeler gauge through the access holes in the side of the clutch.

See page 39-40: ogura-clutch.com/files/pdfIMP/PTOinstallation.pdf

 

[prs]

I checked and adjusted mine at 200 hours. It was a bit tight and set a little out of kilter, that is the three check points were a bit different. I set all to spec. Tip, set the largest of the three first, then the next to largest and then the last. The last one may end up a bit snug before adjusting. When finished, all three check spots should match. I had to remove the hood/front grill assembly to access the check windows.

prs