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munirabbasi

C-130/Hercules Steering Control Valve

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Hello Hercules  Hydro expertises

Can some expertise tell me, have you experience ,failure of steering control valve on C-130 A/B/E/H.

Munir Abbasi

Home hercules Pakistan

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What do you mean be failure?

I have changed steering control valves on all of the MDS/models you listed.

Normally they are changed for leaking out of limits, changed during shimmy troubleshooting, or changed because of normal wear.

I have never seen one explode or anything crazy.  

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50 minutes ago, hehe said:

What do you mean be failure?

I have changed steering control valves on all of the MDS/models you listed.

Normally they are changed for leaking out of limits, changed during shimmy troubleshooting, or changed because of normal wear.

I have never seen one explode or anything crazy.  

Thanks Chris  hehe

Can you submit me any lockheed martin service new/T.O regarding Steering Control Valve. or explain how it work and neutral

Munir Abbasi

home of hercules Pakistan

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The valve is set to a neutral position during overhaul by centering the spool between the outlet ports.  What that means is that the valve should not port fluid when in neutral position, this can be a hard position to achieve during overhaul.

Neutral position should not port fluid.  Neutral uses the internal spring loaded accumulator to take out shocks and movement of the wheels during takeoff and landing.

Are you having problems with the valve porting left or right and not holding the wheels in center position?  

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This service news talks about it.  If in doubt and you dont know how to rig/overhaul the valve, Just replace it.

V12N4.pdf

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2 hours ago, hehe said:

This service news talks about it.  If in doubt and you dont know how to rig/overhaul the valve, Just replace it.

V12N4.pdf

Thanks.

Hercules operator countries guys continue promoting/enhancing/contributing skill level of work center mechanic for maintaining safe operation of C-130 hercules big birds

Best Regards

Munir Abbasi Home of hercules Pakistan

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On 11/18/2018 at 9:11 AM, hehe said:

The valve is set to a neutral position during overhaul by centering the spool between the outlet ports.  What that means is that the valve should not port fluid when in neutral position, this can be a hard position to achieve during overhaul.

Neutral position should not port fluid.  Neutral uses the internal spring loaded accumulator to take out shocks and movement of the wheels during takeoff and landing.

Are you having problems with the valve porting left or right and not holding the wheels in center position?  

Hello hehe Hydraulic Expertise

Can you explain what is out put of steering control valve (high pressure ports) for two cylinder actuator?

Munir Abbasi

Home of hercules Pakistan

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11 hours ago, munirabbasi said:

Hello hehe Hydraulic Expertise

Can you explain what is out put of steering control valve (high pressure ports) for two cylinder actuator?

Munir Abbasi

Home of hercules Pakistan

Are you asking what pressure is ported?

There is no pressure reduction in steering control valve, pressure to the actuators depends on how far you turn the steering wheel.  Full turn is 3k psi to the extend/retract side of applicable actuators (left/right)

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On 11/21/2018 at 8:31 PM, hehe said:

Are you asking what pressure is ported?

There is no pressure reduction in steering control valve, pressure to the actuators depends on how far you turn the steering wheel.  Full turn is 3k psi to the extend/retract side of applicable actuators (left/right)

Thanks

Best Regards

Munir Abbasi Home of Hercules Pakistan

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