Manual inflation of Freightliner suspension

Thank you all for the replies, I have seen the air out valve in the front by the generator so I'll check by the air dryer and the genset both for the air in. Was not certain what it would look like, now I know thanks to you fine folks.

w4phj wrote:
My manual suspension air in Schrader valve is on the air drier behind the rear axle on the drivers side.

My valve up front by the generator is for air supply out.

X2! Look on the air dryer behind the rear axle. That is where I saw the valve on my coach.

My manual suspension air in Schrader valve is on the air drier behind the rear axle on the drivers side.

My valve up front by the generator is for air supply out.

Freightliner chassis usually has a Schrader valve (like on your tires) somewhere at the left front corner and typically accessible via a bay door or maybe the generator access panel. It is used primarily by tow truck operators to air up the suspension for towing, but can also be used in a repair shop if they need to inflate the suspension.

Look for a schrader valve on one of the air tanks. Also, if you have a connection that you can hook an air hose to, like for inflating tires, you can build a fitting to back feed air into the system as well.