BX277486N | Genuine OEM Bendix D-2 Air Brake Governor

The Genuine OEM Bendix BX277486N D-2 Air Brake Governor is designed to regulate air compressor operation in compatible heavy-duty commercial truck pneumatic braking systems. This adjustable governor controls compressor loading and unloading to help maintain proper air pressure in the vehicle's air reservoirs.

Featuring a nominal 110 PSI cut-in and 130 PSI cut-out pressure setting, the Bendix D-2 governor supports consistent compressed air supply for reliable commercial vehicle air brake system operation.

PRODUCT INFORMATION

• Part Number: BX277486N

• Brand: Bendix

• Condition: Not specified

• Component: Air Brake Governor Valve

• Model: D-2

• Valve Type: Adjustable Air Compressor Governor

• System: Pneumatic Air Brake / Air Compressor Control

• Cut-In Pressure: 110 PSI

• Cut-Out Pressure: 130 PSI

• Pressure Adjustment: Adjustable

• Reservoir Ports: (3) 1/8"-27 NPT

• Unloader Ports: (3) 1/8"-27 NPT

• Exhaust Port: 1/8"-27 NPT

• Mounting: Two 0.338" Diameter Holes

• Operating Temperature: -40°F to 200°F (-40°C to 93°C)

• Fuel Type: Not applicable; pneumatic braking component

• Engine Applications: Not engine-specific

• Bendix Reference: 277486N

• Additional Cross-References: BW277486N, 3624618C91, 5017848

APPLICATIONS

The Bendix BX277486N D-2 Air Brake Governor is intended for compatible heavy-duty commercial vehicles equipped with air compressors and pneumatic braking systems requiring a 110–130 PSI governor configuration.

Potential applications include:

• Heavy-Duty Commercial Trucks

• Semi-Trucks and Highway Tractors

• Commercial Trucks with Bendix Air Compressors

• International / Navistar Truck Air Brake Systems

• Freightliner Commercial Trucks

• Volvo and Mack Heavy-Duty Trucks

• Commercial Vehicle Air Dryer and Compressor Control Systems

Important: Compatibility depends on the original governor part number, compressor configuration, pressure requirements, and vehicle air system specifications. The listed vehicle manufacturers do not represent universal fitment.

FUNCTION

The Bendix D-2 Air Brake Governor monitors pressure within the vehicle's compressed air system and controls when the air compressor loads and unloads.

When reservoir pressure falls to the cut-in setting, the governor allows the compressor to resume supplying compressed air. Once system pressure reaches the cut-out setting, the governor sends a pneumatic signal to the compressor unloading mechanism.

This helps maintain air reservoir pressure within the intended operating range and supports proper operation of the vehicle's air brake system.

A worn, damaged, or failing air brake governor may cause symptoms such as:

• Air compressor running continuously without unloading

• Air pressure failing to reach the correct cut-out level

• Compressor failing to restart at the proper cut-in pressure

• Excessive or inconsistent air system pressure

• Air leakage around the governor or control ports

• Frequent compressor cycling or abnormal pressure fluctuations

WHY REPLACE AN AIR BRAKE GOVERNOR?

A malfunctioning air brake governor can interfere with proper compressor cycling and air pressure regulation, potentially affecting the performance of the entire pneumatic braking system.

Replacing a defective governor with the correct Genuine OEM Bendix BX277486N D-2 component helps restore intended compressor control, proper air reservoir charging, and consistent air pressure regulation.

Maintaining a properly functioning air brake governor is essential for commercial trucks operating under demanding highway and heavy-load conditions.

FITMENT INFORMATION

The Bendix BX277486N D-2 Air Brake Governor is intended for specific heavy-duty commercial vehicle pneumatic brake configurations.

Before purchasing, verify:

• Original Part Number: BX277486N

• Bendix Reference: 277486N

• Cross-Reference Numbers: BW277486N, 3624618C91, 5017848

• Truck make, model, and model year

• Required 110 PSI cut-in pressure

• Required 130 PSI cut-out pressure

• 1/8"-27 NPT port configuration

• Compressor and air dryer system compatibility

• Mounting arrangement and original governor design

• Vehicle Identification Number (VIN)

If you are unsure whether this air brake governor fits your truck, please contact us with your VIN, truck model, model year, and original part number before ordering.

GENUINE BENDIX PART

Bendix manufactures pneumatic braking, compressor control, and commercial vehicle safety system components.

The Genuine OEM Bendix BX277486N D-2 Air Brake Governor is designed for specified heavy-duty air brake applications, supporting dependable compressor cycling and proper system pressure regulation when correctly matched and installed.