macattack Posted March 27, 2012 Share Posted March 27, 2012 this is on my other truck. its on a international with a 5 speed allison auto. last friday i could here a clinging sound with the pto disengaged. what seems to be happening is my pto is not disengaging fully.does anybody know if there is something else that could cause the pto not to fully disengage.what does the pressure switch on the pto do? its got 2 little slip on connectors and is threaded into te pto.just want to make sure there is nothing else to check before i pull the pto.thanks Quote Link to comment https://www.bigmacktrucks.com/topic/24119-pto-troubles/ Share on other sites More sharing options...
Lmackattack Posted March 27, 2012 Share Posted March 27, 2012 is it air operated? if so is the switch leaking air or not exhausting air?the shaft the the idle gear spins on could be bad letting the gear make light contact? Quote Link to comment https://www.bigmacktrucks.com/topic/24119-pto-troubles/#findComment-110533 Share on other sites More sharing options...
macattack Posted March 27, 2012 Author Share Posted March 27, 2012 thanks. it is electric operated. dont know if the pressure switch has anything to do with it. i also replaced the solenoid approx 1 year ago. (the little elec valve that allows tran fluid to the pto to engage i guess?) Quote Link to comment https://www.bigmacktrucks.com/topic/24119-pto-troubles/#findComment-110593 Share on other sites More sharing options...
mack4ever Posted March 27, 2012 Share Posted March 27, 2012 i think your pto is operated by oil pressure.there are some little cluchdiscs like the cluch on a motorcicle.you have to make sure the oilpresure if fully of when you disangage the pto.but i think there is one or more disc broken.mack4ever. Quote Link to comment https://www.bigmacktrucks.com/topic/24119-pto-troubles/#findComment-110598 Share on other sites More sharing options...
macattack Posted March 27, 2012 Author Share Posted March 27, 2012 i think your correct mack4ever. spoke to a service man at parker today and he said the same thing. oh well never removed one i guess it will be a learning experience.thanks guys Quote Link to comment https://www.bigmacktrucks.com/topic/24119-pto-troubles/#findComment-110600 Share on other sites More sharing options...
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