Steering logic.

[Spiffy]

You're putting in a larger pump? Awesome!! /forums/images/graemlins/cool.gif I have to hear how that works out.

I have to wonder (though on the 2445, I don't see room) if you'd have room to run a separate pump for steering; now that'd be really sweet.

 

[J_J]

The pump that I have for steering and lift, is a very small pump. It's about 4x4 in , and driven by a belt on the front of the gas engine. The larger pump will go through a flow divider , and should give the action that I want.

 

[BobRip]

Sorry JJ, I did not mean to offend. The larger pump should do the trick. I will say no more.

Bob Rip

 

[toy]

JJ yeaterday while I was using my pt I remembered this post so I tried turning the steering to lock and as I already knew the lift and tilt stoped moved it back and it picked up again. Moved the steering back to lock and turned loose of the steering wheel to see if it would pick back up just by turning loose of the steering wheel and it never picked back up the tilt, turned the steering wheel back a little and the lift and tilt picked back up again. While I was doing this with the steering wheel locked I could hear the hissing sound of a bypass but instead of it coming from the releive valve in the back it sounded like it was coming from the steeering valve[motor] . I beleive that valve has a bypass port in it when it has reached its max to keep it form building up undue pressure in the steering system. You mentioned that your pump ran off of a fan belt to the motor. Is there enough room for you to add a seperate pump just for the lift and tilt and of course withe its own releive valve. If there is that would be nice, in my 425 I think there is some unused ports on the oil tank if Im not mistaken. If you could do that you would still have the power beyond on the steering circuit to supply oil for another seperate auxillary valve since you wouldn't be using that part of the circuit for lift and tilt any more. I got a message when I started to send this message stating the rules for the forum I hope I haven't offended anyone I hope it was something that was sent to alll users. But if that is not the case and someone is offended at my posts I am sorry and I didn't mean to offend.

 

[J_J]

Thanks for the info. No, I don't have room for another pump, but I have seen pumps with 2 or 3 sections on them.

I think every one is getting that message about rules. Number 8 was in bold print.

 

[MossRoad]

TO: All users of the PT forums...

As to the rules appearing at the start of every post... that has been added to all users of TBN just as a reminder for those that have never taken the time to read them. No one in the PT forum has anything to worry about(except me). This is one of the cleanest, best mannered, best intentioned group of people I've ever dealt with. I'm probably the black sheep here as far as following the rules go and appreciate being kept in line via PM once in a while. /forums/images/graemlins/wink.gif Thanks to all for contributing to many people's enjoyment of this forum and TBN, overall.

J_J... As to multi-section pumps, our PT425 has three pumps. One in front of the engine for drive, and two behind the engine. One is piggybacked onto the next. Not sure if that is actually a multi-section pump or just two pumps running off the same shaft. They have seperate intakes, so I guess that makes them seperate pumps?

 

[J_J]

On two of my pumps, the variable speed pump for the wheel motors, and the PTO pump, which is a fixed displacement pump are bolted together, and run at the same speed. They are two different pumps. The third pump is the lift and steering pump. The multistage pump is like the pump in the attachment. They could all be the same or have different displacements. You see these a lot on golf course machines that use hydraulic gang mowers.

 

[MossRoad]

I found an old post of mine that explained the pumps pretty well. Here's a link to it. There are a couple of pictures of my pumps there, too.

 

[J_J]

This is a picture of my lift and steering pump.

 

[ol'George]

You fellers talk of tamping a fence post,
don't think I ever did that, I dig a hole by what ever means available, auger or shovel, then drop in the post, add a 5 gallon pail of water give er take, then kick in the previously removed dirt, wiggle the post some to distribute the dirt maybe poke a branch or stick in there to make a good sloppy mess and walk away.
Tomorrow it will be as hard as if yall used cement. been doing it that way for 50+ years.