PTO operation
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More Turbo
Joined: Feb 2008
Posts: 516
Likes: 3
From: Michigan
PTO operation
OK, I got my N600 home, figured out why it wouldn't start. Got her, (Lucy), running at a smooth idle, but she still needs some work on freeing up the gas pedal and the throttle. My question is How do I operate the PTO? There are two ***** that are mounted under the dash, left of the steering wheel. Is there a specific RPM it should be running? With out a tach, how do I know when I'm at the correct RPM? Like about 1000 RPM's, I guess one **** pulls out to engage the PTO, Then the other raises it and lowers the bed?
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
On older units you have to clutch in, put the trans in direct gear to stop the shaft from spinning, engage the PTO, place trans in neutral, lock the idle with the **** at the desired speed ( not needed normally) and let the clutch out.
Junior User
Joined: Dec 2015
Posts: 88
Likes: 3
If this is a dump truck the engine speed with the pto in would vary with how heavy the load in the body is and how fast you want it to come out. If you are looking for a new and amazing way to mess up drive the truck with the pto engaged. If the control valve leaks the body will slowly creep up and when it hits a bridge the results are interesting. Most trucks the body comes down by gravity so some interesting things can happen if you dump while on a steep hill facing up.
Laughing Gas
Joined: Sep 2018
Posts: 760
Likes: 35
From: Mid-South Missouri
Some life saving advice. Never ever, lean over the truck frame while the bed is up, unless the bed had a folddown brace that prevents the bed from coming down in the event a hydraulic hose breaks and it comes down on you.
If no stop, get one installed/made, or at least lay a 4x4 6' block across the frame at the rear, between the bed and frame..
If you have questions about a bed brace, go visit someone that owns a bigboy dump truck and see what they have on theirs.
If no stop, get one installed/made, or at least lay a 4x4 6' block across the frame at the rear, between the bed and frame..
If you have questions about a bed brace, go visit someone that owns a bigboy dump truck and see what they have on theirs.
Thread Starter
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More Turbo
Joined: Feb 2008
Posts: 516
Likes: 3
From: Michigan
Some life saving advice. Never ever, lean over the truck frame while the bed is up, unless the bed had a folddown brace that prevents the bed from coming down in the event a hydraulic hose breaks and it comes down on you.
If no stop, get one installed/made, or at least lay a 4x4 6' block across the frame at the rear, between the bed and frame..
If you have questions about a bed brace, go visit someone that owns a bigboy dump truck and see what they have on theirs.
If no stop, get one installed/made, or at least lay a 4x4 6' block across the frame at the rear, between the bed and frame..
If you have questions about a bed brace, go visit someone that owns a bigboy dump truck and see what they have on theirs.
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More Turbo
Joined: Feb 2008
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From: Michigan
OK, whats the best way to free up the bowden cables that control the PTO? Short of removing then and soaking them.
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Laughing Gas
Joined: Sep 2018
Posts: 760
Likes: 35
From: Mid-South Missouri
Uumm not a lot if they are liner covered. Could possibly be just the exposed cable ends have rust buildup inside.
Soak with your favorite penetrating fluid. Take pliers, gently grip exposed housing and slightly try to twist/bend them.
Let it sit and soak for a while maybe. Lay the ends in a flat pan, fill with diesel and let soak.
If not, remove the complete cables, lay the **** ends on the floor, propping up the other end 4-5', (maybe tie them up) then flood the ends with penetrate numerous times.
If not......well........new cables.
Soak with your favorite penetrating fluid. Take pliers, gently grip exposed housing and slightly try to twist/bend them.
Let it sit and soak for a while maybe. Lay the ends in a flat pan, fill with diesel and let soak.
If not, remove the complete cables, lay the **** ends on the floor, propping up the other end 4-5', (maybe tie them up) then flood the ends with penetrate numerous times.
If not......well........new cables.
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More Turbo
Joined: Feb 2008
Posts: 516
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From: Michigan
Ok, found my problem. I did get the bed up in the air, I did stay at the ready on the clutch. I'm thinking there is no relief valve in the system due to while raising the bed a second time I let the bed "dead head" at the top. The truck stalled quickly. I will look the system over to see if one is built in to the hydraulic system. If anybody knows these systems feel free to chime in. I know I need a new cable for the valve, I found it bent sharply just in front of the valve lever. While it kept the cable from working, the valve could be worked thru its travel by hand from under the truck. There is also a cable attached to the lever that goes to the rear of the bed. This cable is free hanging near the rear of the bed. I pulled the cable to the rear by hand just in front of the rear axle. This allowed the bed to lower. This seemed to be the way the PO was using the hoist as the cable was clean in this spot where I pulled on it. Is there another reason for this cable to the rear of the bed? It looks to be original to the truck.
Laughing Gas
Joined: Sep 2018
Posts: 760
Likes: 35
From: Mid-South Missouri
Ok, found my problem. I did get the bed up in the air, I did stay at the ready on the clutch. I'm thinking there is no relief valve in the system due to while raising the bed a second time I let the bed "dead head" at the top. The truck stalled quickly. I will look the system over to see if one is built in to the hydraulic system. If anybody knows these systems feel free to chime in. I know I need a new cable for the valve, I found it bent sharply just in front of the valve lever. While it kept the cable from working, the valve could be worked thru its travel by hand from under the truck. There is also a cable attached to the lever that goes to the rear of the bed. This cable is free hanging near the rear of the bed. I pulled the cable to the rear by hand just in front of the rear axle. This allowed the bed to lower. This seemed to be the way the PO was using the hoist as the cable was clean in this spot where I pulled on it. Is there another reason for this cable to the rear of the bed? It looks to be original to the truck.
Is your pump *in* a tank full of fluid?
Dead head?? Explain.
Don't understand why the cable is there that heads towards the rear axle.
What did they originally haul in this truck?
Metal (rock and gravel) bed, or grain bed?
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More Turbo
Joined: Feb 2008
Posts: 516
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From: Michigan
As for the cable to the rear, I have no idea where they had it ended. Did they ever install a device that would automatically shut the valve off once it was in the "top recommended height"?
Laughing Gas
Joined: Sep 2018
Posts: 760
Likes: 35
From: Mid-South Missouri
Possible they had it hooked to stop the pump after the bed was full height, but I don't understand why.
And why would the cable run that far back.....makes no sense to me. I've worked on a lot of rock and grain trucks, though not necessarily on the hydraulic lifts.
Super Moderator
Joined: Apr 2004
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Without a relief valve, disaster would soon follow once it was all the way up.
Can you see a brand and model name and number on the hoist and pump?
Once you figure that out, you can search under those names and probably get almost every bit of info, if not an owner's manual on line.
On the trucks my dad had, the hydraulic cable had 3 "positions". All the way out was up, halfway in was hold, and all the way in was down.
Rear cable might have been "tailgate" related?
Can you see a brand and model name and number on the hoist and pump?
Once you figure that out, you can search under those names and probably get almost every bit of info, if not an owner's manual on line.
On the trucks my dad had, the hydraulic cable had 3 "positions". All the way out was up, halfway in was hold, and all the way in was down.
Rear cable might have been "tailgate" related?
Thread Starter
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More Turbo
Joined: Feb 2008
Posts: 516
Likes: 3
From: Michigan
Without a relief valve, disaster would soon follow once it was all the way up.
Can you see a brand and model name and number on the hoist and pump?
Once you figure that out, you can search under those names and probably get almost every bit of info, if not an owner's manual on line.
On the trucks my dad had, the hydraulic cable had 3 "positions". All the way out was up, halfway in was hold, and all the way in was down.
Rear cable might have been "tailgate" related?
Can you see a brand and model name and number on the hoist and pump?
Once you figure that out, you can search under those names and probably get almost every bit of info, if not an owner's manual on line.
On the trucks my dad had, the hydraulic cable had 3 "positions". All the way out was up, halfway in was hold, and all the way in was down.
Rear cable might have been "tailgate" related?
Thanks guys for your input.