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Wayne, RV Mechanic
Category: RV
Satisfied Customers: 9453
Experience:  Work on several type of Rv engine, Trans, brakes
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I have a freightline chassis on RV. Air taks gone empty I

Customer Question

I have a freightline chassis on RV. Air taks gone empty I need to manually refill to engage emergency brake and start engine
Submitted: 1 year ago.
Category: RV
Customer: replied 1 year ago.
It is a Gulfstream RV, CAT 3126 engine. Since Air is out the emergency brake will not engage so safety cut off prevent upper oil pressure pump from starting engine
Customer: replied 1 year ago.
I need to locate air fill valve to inject enough air to engage emergency brake
Expert:  Wayne replied 1 year ago.

Hi I'm Wayne

I ill help you with this

they do not usually put a shredder valve in the air system

if it did have one, on the end of a air tank,

you can pick one up at a auto/Truck parts store, 1/4" NPT

and install it into the tank your self

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Thank You


Customer: replied 1 year ago.
Wayne, Thank you for your response and I hope your enjoying the Memorial Day Holiday. I did find that the tanks on this Gulfstream RV Freightliner chassis do not have an exterior fill valve after doing a thorough examination. The PowerGear stabilizer unit is flashing "Emergency Brake not set" and I believe the engine is fine but the automatic kill is activated because the brake is not set (code 39 high pressure oil pump not working). So I cannot set the brake without air pressure. nut perhaps override the Power Gear by grounding pin one (brake light)???
Is there a way to override this emergency brake to set without air pressure? (with wheels safely chocked of course).
Even worse case if the CAT 3126 needs to have a new high pressure oil pump I can't even tow until the brake is released.
Customer: replied 1 year ago.
If we can solve this then the fee for your help is well worth the price.
Expert:  Wayne replied 1 year ago.


Yes a good Warm, and dry holiday,BBQ this afternoon, at cousin house

there is no way to over ride that I know of

other then installing that fill valve in the end of air tank

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