Not using power beyond...plug port or no!

[RickB]

I had posted but came back and deleted it because my suggestion had apparently already been tried and I decided I don't have any further help. Based on what I know it should work with E and T teed together. Good luck.

 

[Tinhack]

That's what I was asking in the original post...

I got here while you posting your responses to other replies.

I was looking at the Char-Lynn manual. It may be that the E port is not very sophisticated. It's only supposed to have pressure while NOT steering. As mentioned by Rick, it would seem that T and E could be plumbed together and returned to tank. But you said there's not enough pressure to operate a cylinder. Perhaps you aren't turning enough?

Added: Or your cylinder(s) too large?

That's why I said you may have to add a restrictor on the E port but still plumb it back to the tank. You can't just block it.

 

[RickB]

Time to tee E and T together & connect to tank then deadhead a work port (R or L) to a pressure gauge of suitable range. Fire it up and turn the wheel.

 

[npalen]

http://char-lynn.net/yahoo_site_admin/assets/docs/CHAR_LYNN_STEERING_CATALOG_ENG.58221037.pdf

Page 6 addresses the power beyond function. Not sure that this is of any help but wanted to throw it "out there" just in case.

Edit: I'm sensing some confusion between a regular SelectorControlValve with power beyond and the steering valve with power beyond.

I'm thinking that a SCV can have power beyond capability with the correct adapter sleeve but the steering motor in question HAS to have the PB port open to either the tank or a downstream valve. Yes, there has to be a relief valve somewhere in the equation.

I'm hoping that your pump wasn't damaged by blocking the PB port.

 

[npalen]

You'll may have to add a relief valve, pilot valve or restrictor to the "E" port to maintain enough pressure to operate a cylinder. Char-Lynn says you can not block the E port entirely. That's what I know.

Just recently went through adding PS to my Kenbota. But I have a 4-port steering valve. My problem is a leaking hose so I have to tear into the dash/column to get to it.

I'm not understanding why one would need to add a relief valve, pilot valve or restrictor to the "E" port. A relief valve, yes, if there is none upstream.

 

[BadDecisions]

Well, turns out that it was the pump after all...I ended up returning it to my original incorrect configuration - E port blocked, T port to tank, and still had no power in the system (this originally provided great power to the steering cylinder, but overheated the pump super fast)

Pulled the T hose, put the end in a bucket, and fired up the motor. Barely a dribble of fluid, even at 3,000RPM. Swapped the pump out with a backup, reconnected both the E and T hoses to the tee, and bingo! Properly working steering!

Thanks for putting up with me

All this said, SHOULD I be running some kind of restrictor or anything else, other than wide open into the tank, on that E port/hose for now? My future plan is to use it for a hydraulic cylinder on the driveline disconnect, but I want to get the truck drivable first.

 

[Tinhack]

There's not supposed to be fluid out of the T port unless you're steering so that is working as it should. All the flow is diverted to the E port in that circumstance. If your future plan is to use the E port, it will only have "excess flow" not used by the steering cylinder(s). The steering cylinder(s) will have priority--As it should.

 

[Tinhack]

I'm not understanding why one would need to add a relief valve, pilot valve or restrictor to the "E" port. A relief valve, yes, if there is none upstream.

That was a suggestion to divert what may have been too little flow from the pump. It looks like the OP changed the pump so nothing else is needed. Disregard that statement.

 

[npalen]

Well, turns out that it was the pump after all...I ended up returning it to my original incorrect configuration - E port blocked, T port to tank, and still had no power in the system (this originally provided great power to the steering cylinder, but overheated the pump super fast)

Pulled the T hose, put the end in a bucket, and fired up the motor. Barely a dribble of fluid, even at 3,000RPM. Swapped the pump out with a backup, reconnected both the E and T hoses to the tee, and bingo! Properly working steering!

Thanks for putting up with me

All this said, SHOULD I be running some kind of restrictor or anything else, other than wide open into the tank, on that E port/hose for now? My future plan is to use it for a hydraulic cylinder on the driveline disconnect, but I want to get the truck drivable first.

Wide open to the tank for now but then to a normally open control valve when adding the cylinder. No restrictor needed as the steering valve takes care of restricting the flow by diverting it to the steering cylinder when needed.
Glad you got it going!

 

[Zebrafive]

Should there be check valve(s) on the T & E lines where they go into the TEE?
So neither port can put pressure into the other port?
Or is that not needed since the TEE is open to tank?