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Old 05-04-2022, 10:06 AM   #1
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Join Date: May 2022
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Brake Dryer & Trans Servicing

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.
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Old 05-07-2022, 03:46 AM   #2
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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.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
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