Shawn Burdett Posted May 5, 2012 Share Posted May 5, 2012 I am having problems with my pro on my truck I run side dumps and the trailorsraise OK but when I lower them it blows the filterOff or loose and I lose all my oil any suggestions onwhat is causing this and what can I do to correct it. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/ Share on other sites More sharing options...
hatcity Posted May 5, 2012 Share Posted May 5, 2012 When was the last time you changed filter? Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117863 Share on other sites More sharing options...
Shawn Burdett Posted May 5, 2012 Author Share Posted May 5, 2012 I just changed it again on Wed.I ranIt Thursday no probe then on Fri.it came loose again whEn I was lowering the trailor. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117866 Share on other sites More sharing options...
Shawn Burdett Posted May 5, 2012 Author Share Posted May 5, 2012 Should I go ahead and change it again? Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117867 Share on other sites More sharing options...
41chevy Posted May 5, 2012 Share Posted May 5, 2012 What make filter? Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117869 Share on other sites More sharing options...
MACKS Posted May 5, 2012 Share Posted May 5, 2012 Sounds like the threads are worn out and the pressure is pushing the filter off,there is no way for the filter to loosen or un screw it's self. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117872 Share on other sites More sharing options...
Shawn Burdett Posted May 6, 2012 Author Share Posted May 6, 2012 Its a permco filter Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117881 Share on other sites More sharing options...
Shawn Burdett Posted May 6, 2012 Author Share Posted May 6, 2012 What would happen if o just by passed the filter all together? Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117883 Share on other sites More sharing options...
b61mack Posted May 6, 2012 Share Posted May 6, 2012 What would happen if o just by passed the filter all together? Are you using big enought filter, is your return lines big enought ???. just a thought. Ron Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117885 Share on other sites More sharing options...
Shawn Burdett Posted May 6, 2012 Author Share Posted May 6, 2012 What would happen if o just by passed the filter all together? Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117893 Share on other sites More sharing options...
theakerstwo Posted May 6, 2012 Share Posted May 6, 2012 If it ever work good then i would check for the pump or supply line for sucking air.And yes the threads may be bad on the filter. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117897 Share on other sites More sharing options...
Rob Posted May 6, 2012 Share Posted May 6, 2012 Don't think I've worked on anything that uses a filter in the return line to tank. If this is the case I'd think it is plumbed incorrectly. There should be a strainer in the tank, and a 100 mesh filter on the suction side of the hydraulic pump. From here the control valve is pressurized and then ported pressure is fed to your cylinder via the control valve. When the valve is in neutral position, discharge is routed back to tank through the control valve. Hydraulic presure is also dumped back to tank when the valve position is in the lower position. I don't think I've ever seen a filter in the return circuit myself.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117898 Share on other sites More sharing options...
Lmackattack Posted May 6, 2012 Share Posted May 6, 2012 sounds like air in the system or the flow is to much for the filter. You can run without it. they did it for years untill someone thouht it needed a filter.. i run mine without a filter Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117905 Share on other sites More sharing options...
lucerne tractor Posted May 6, 2012 Share Posted May 6, 2012 Don't think I've worked on anything that uses a filter in the return line to tank. If this is the case I'd think it is plumbed incorrectly. There should be a strainer in the tank, and a 100 mesh filter on the suction side of the hydraulic pump. From here the control valve is pressurized and then ported pressure is fed to your cylinder via the control valve. When the valve is in neutral position, discharge is routed back to tank through the control valve. Hydraulic presure is also dumped back to tank when the valve position is in the lower position. I don't think I've ever seen a filter in the return circuit myself.RobMy thoughts exactly, Running fluid back through the filter pushes the dirt back out. Going up the pump regulates the flow, going down the weight of the body regulates the flow and you should be able to slow the flow with a controll valve so it doesn't drop like a ton of bricks, but doesn't take all day either, it shouldn't run through the filter. ( My thoughts from a TA in Moundsville W.V.) Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117906 Share on other sites More sharing options...
Shawn Burdett Posted May 6, 2012 Author Share Posted May 6, 2012 What would happen if o just by passed the filter all together? Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117907 Share on other sites More sharing options...
DigDug Posted May 6, 2012 Share Posted May 6, 2012 Weird , but log splitters all have the filter on the return side of the valve. I think you may have to small of a filter in the line for the fast return flow. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117910 Share on other sites More sharing options...
RowdyRebel Posted May 6, 2012 Share Posted May 6, 2012 Don't think I've worked on anything that uses a filter in the return line to tank. If this is the case I'd think it is plumbed incorrectly. There should be a strainer in the tank, and a 100 mesh filter on the suction side of the hydraulic pump. From here the control valve is pressurized and then ported pressure is fed to your cylinder via the control valve. When the valve is in neutral position, discharge is routed back to tank through the control valve. Hydraulic presure is also dumped back to tank when the valve position is in the lower position. I don't think I've ever seen a filter in the return circuit myself.RobThe filter on my truck is on the return line.My thoughts exactly, Running fluid back through the filter pushes the dirt back out. Going up the pump regulates the flow, going down the weight of the body regulates the flow and you should be able to slow the flow with a controll valve so it doesn't drop like a ton of bricks, but doesn't take all day either, it shouldn't run through the filter. ( My thoughts from a TA in Moundsville W.V.)On an end dump, the hydraulic oil flows through the suction line to the pump to the cylinder to raise the bucket, and then reverses flow back through the pump & suction line to the tank....your basic 2-line wet kit.Side dumps use hydraulic pressure both to extend AND retract the hydraulic cylinder. The oil always flows from the tank, through the suction line, to the pump, where it is routed to a reversing valve (which can be mounted on the truck, but is usually located on the trailer), and back to the tank through a return line. Inside the cab, you'll have an on-off-on switch to control the reversing valve...in the "off" position, the hydraulic oil is cycled back to the tank. Push the switch one direction and the valve sends the oil to extend the cylinders. Push the switch the other way and the valve sends the oil to retract the cylinders.So, a filter on the return line isn't going to have any backwash, because the oil is only returning to the tank.What would happen if o just by passed the filter all together?Nothing, except the oil would not be filtered...any contaminants which may be in the oil will remain in the oil to be recirculated. It is not a necessary component, and I'm probably the only truck in the fleet that has one....mostly because I wanted it on there because stuff is expensive and I want to prolong the useful life of my stuff because I plan on keeping it for a while. Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117918 Share on other sites More sharing options...
Olivetroad Posted May 6, 2012 Share Posted May 6, 2012 I have had similar weird things like PTO clamped lines blowing off when the vent on the reservoir is clogged. Have you cleaned/checked it lately? Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117933 Share on other sites More sharing options...
RowdyRebel Posted May 6, 2012 Share Posted May 6, 2012 I have had similar weird things like PTO clamped lines blowing off when the vent on the reservoir is clogged. Have you cleaned/checked it lately?Seems like an odd thing to happen in a closed system where the oil is generally being constantly recirculated. I'd expect pressure issues in the case of something like an end dump, where the oil from the tank is pretty much pumped out to raise the hoist and returned to the tank when the bed lowers....but you could run a side dump with a relatively small amount of oil....just have a pair of small cylinders which are pushed out & pushed back in.....stranger things have happened though. The world doesn't always make sense. Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117936 Share on other sites More sharing options...
slpwlker Posted May 6, 2012 Share Posted May 6, 2012 My thoughts exactly, Running fluid back through the filter pushes the dirt back out. Going up the pump regulates the flow, going down the weight of the body regulates the flow and you should be able to slow the flow with a controll valve so it doesn't drop like a ton of bricks, but doesn't take all day either, it shouldn't run through the filter. ( My thoughts from a TA in Moundsville W.V.)You up there at Dallas pike damnit man. Go to the restaurant behind the Ta. Think it is the Ruttin Buck. Damn good food,decent service, Good Eye candy. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117975 Share on other sites More sharing options...
David Posted May 6, 2012 Share Posted May 6, 2012 All of my rolloff trucks have the filter on the return to the tank. If the tank vent is plugged then pressure will build when returning more oil than the system is using. Check to see if the vent has been replaced with a plug. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-117985 Share on other sites More sharing options...
randyp Posted May 8, 2012 Share Posted May 8, 2012 I dont have any filters on mine. I did have a vent plug one time, LOL, blew the tank apart at the seams! it was hard to bleeve a vent could plug bad enough to split seams on a steel tank, but it did. Course, my bed sets a land speed record on its way down anyway. randyp Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-118296 Share on other sites More sharing options...
slpwlker Posted May 8, 2012 Share Posted May 8, 2012 No filter on mine either. Thought it had one till I went to change it and nothing there Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-118298 Share on other sites More sharing options...
shortstack Posted May 8, 2012 Share Posted May 8, 2012 If you pull different trailers often, a filter isn't a bad idea, but if you pull the same one all the time, I wouldn't think it's that necessary. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-118321 Share on other sites More sharing options...
slpwlker Posted May 8, 2012 Share Posted May 8, 2012 my thing was all the time i had it i didn't know. the shop said they changed one never thought anything till i went to change it 4 years latter. once in a great while i pull another trailer that might need a pto but not ofte. Quote Link to comment https://www.bigmacktrucks.com/topic/24946-pto-problems/#findComment-118322 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.