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Leaking norgren control valve
The norgren control valve that controls the step well cover leaks air out the top exhaust port when the step cover is extended, however it does not leak when retracted. Can it be cleaned or do I have to replace it? Any ideas appreciated.

Re: Leaking norgren control valve
Reply #1
Can it be cleaned or do I have to replace it?

Lynn,
They are prety simple and can be cleaned.  If yours is OEM you will have a funny shaped O ring that you need to take care with, other...

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Re: Leaking norgren control valve
Reply #2
I was considering taking the air lines loose and spraying silicone in them and letting it cycle through the actuators and the cylinders. All that dry air for that many years might need a little lubrication in that part of the system. What do you...

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Re: Leaking norgren control valve
Reply #3
It might work. If you have dust from the dryer in there the spray will most likely turn it into mush.

If spray lube don't work  you will still have to pull it apart and give the shuttle a good cleaning.

Mike

  • DavidS
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Re: Leaking norgren control valve
Reply #4
I would be afraid to add anything to the system ...Might plug everything up down stream or worse..

  • MAZ
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Re: Leaking norgren control valve
Reply #5
The norgren control valve that controls the step well cover leaks air out the top exhaust port when the step cover is extended, however it does not leak when retracted. Can it be cleaned...


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Re: Leaking norgren control valve
Reply #6
If it is the exhaust port that is on top of the actuator, that is where it is leaking.

Re: Leaking norgren control valve
Reply #7
Lynn,

We recently took our valve apart. Check this out:

Step & step-slide air control valve operating too slow.

Barry

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Re: Leaking norgren control valve
Reply #8
I just replaced one yesterday with a Mac valve part number 912B-PM-551BA. I got it in Tampa Florida from Adams Air and Hydraulics

Re: Leaking norgren control valve
Reply #9
Valve works by swapping air-in with air-out ports and restricting air-out venting to slow down step or step-slide to keeping it from banging closed or open.

Restrictor vent is adjustable and can be removed to clean.  Rotating vent will control...

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Re: Leaking norgren control valve
Reply #10
Air is leaking out the exhaust port of the actuator for the step well cover when in the retracted position. I think this may mean that air is leaking around the piston when it is in the closed position.    Maybe.  Thanks for all suggestions. ...

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Re: Leaking norgren control valve
Reply #11
I think this may mean that air is leaking around the piston when it is in the closed position.   

Lynn,

The piston is sticking in such a manner that both ports are slightly open. It must...

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Re: Leaking norgren control valve
Reply #12
Maybe this will help.
This was my step cylinder.
If the step well cover actuator is made by Ingersall Rand these contacts should be able to help.

Here is the step cylinder overhaul info:

You can get the kit from:
Kelly Supply (Grand Island,NE.)
...

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