Brake Dryer & Trans Servicing

[64GunPilot]

Wife and I bought a 2002 Itasca Horizon about a year ago. We gave it several short shake down trips. It has no previous service records. Am planning a full generator, engine, and transmission service. A few questions.

Should I service the brake dryer too? Or if the tank dump valves dump dry air don't mess with it? Just curious people's train of thought here.

In the picture below I have two questions.

1. Is the blue arrow in the one picture indeed pointing at the Haldex air dryer?

2. My MH3000 Allison transmission sump is indeed the 2" sump yes?

(yes I know i am currently working on a blown out hydraulic hose leak and will get all this mess cleaned up)

Thanks for your advice.

[Ray,IN]

Yes the air dryer desiccant filter must be replaced, for a MH it should be replaced @ 3-4 years of occasional use. For semi's it must be replaced annually.
The air dryer is usually mounted to the chassis frame, and looks like this.
Replacement filters and complete repair kits are widely available from HDT repair shops and NAPA stores. You just need your model #.
Haldex PURest air dryer manual for general information.