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PAI · Engine
LGV-3645
In stock · ships from Knoxville
This is an air brake D-2 governor that manages the air pressure in your truck's air system by controlling when the compressor runs and unloads.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
Universal fit
Advertised as fitting all trucks with air systems via a universal D-2 governor style. It is also a direct OEM replacement for specific Mack and other manufacturer models that used Bendix 275491 or Mack 20QE275P1 style governors. Exact vehicle-specific cross-references are not verified.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 24.
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It's a critical part of the air brake system, ensuring the tanks stay within a safe operating range, typically between 100 and 120 PSI. This governor is adjustable, so you can fine-tune the cut-in and cut-out pressure to match your system's requirements. You'd replace it if your old governor is leaking, not cycling correctly, or failing to maintain proper air pressure, which can lead to compressor damage or braking issues.
Part Number: LGV-3645
MAK20QE275P1 GOVERNOR = 275491
Dealer: Post Onsite
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