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Automann · Air System
170.275491
In stock · ships from Knoxville
The Automann 170.275491 is a D-2 style air compressor governor that regulates the unloader mechanism on heavy-duty truck air-brake systems.
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Verified fitment for 10 applications
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All confirmed applications for this part number.
Caterpillar
Freightliner
International
Kenworth
Peterbilt
Other applications
Caterpillar
Freightliner
International
Kenworth
Peterbilt
Other applications
Fits vehicles using D-2 style governor; verify that your air system uses 1/8 in NPT ports and the 100/120 PSI pressure spec matches your build.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 23.
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It maintains the proper pressure window by cutting in the compressor at 100 PSI and unloading it at 120 PSI, with both settings being adjustable. You typically replace it when the air system pressure cycles erratically, fails to build or hold pressure, or the governor’s internal valve wears out, causing continuous compressor operation or frequent air purging. This unit comes with a mounting gasket and four port plugs.
Part Number: 170.275491
D2 AIR GOVERNER
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
