Aftermarket 284358 D-2 Style Air Compressor Governor, Replaces 275491

  • Manufacturer: Bendix

  • Part Number: 284358X

  • Condition: Remanufactured

  • Bendix reman valves have the same warranty as new valves

  • Pressure Range: Adjustable from 105-125 psi

  • High temperature o-rings and waterproof cover

  • Includes gasket and pipe plugs

The Bendix D-2 governor Air Brake Controls Valve the pressure in the air system. The compressor runs continuously while the engine is running, so the D-2 governor activates the compressor’s unloader mechanism when system pressure reaches the governor’s cut-out pressure. It deactivates the unloaders once system pressure has dropped to the governor’s cut-in pressure. While unloaded, the compressor simply pumps air from one cylinder to the other rather than send it to the tank.

Cross References: 284358N, 284358, 284358X, 102178, 102178X, 108818, 227435, 275491, 275491X, 275707, 275707X, 18537, KN18500X, KN18530, KN18537, VHD18537,275200,275491,275508,275530,275707,277486,283657,284358

A cross reference listing means that this valve is a suitable replacement for the part numbers listed. Some changes in air line plumbing may be required.

D-2 Air Governor

Never condemn or adjust the governor pressure settings unless you have checked pressure with an accurate test gauge or a dash gauge that is registering accurately. Standard dash gauges are only required to be accurate to within +/- 10 percent.

Remember the following if adjustment is necessary:

  1. Turn the adjusting screw counter-clockwise to lower the air pressure setting.

  2. Turn the addjusting screw clockwise to increase the air pressure setting.

  3. Be careful not to overadjust. Each quarter turn of the adjusting screw raises or lowers the pressure setting approximately 4 psi.

  4. The cut-in and cut-out range is not adjustable.

The most common cause of governor failure is contamination. Blow out all attaching lines, hoses, etc when replacing a governor. Make sure the reservoir pressure sensing line is routed from the reservoir so that no contamination may enter the line and pass into the governor. A replacement D-2 air governor can be found here.


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XIAMEN WABCO INDUSTRIAL CO.,LTD is headquartered in Xiamen. We own several factories and joint-ventured manufacturers in China which are successfully certified withTS16949 and ISO9001/2009 quality control system.

XIAMEN WABCO INDUSTRIAL CO.,LTD covers an area of 2000 Square meter and has around 200 staffs members. Furthermore, all our products are manufactured with advanced equipment and strict QC procedures in order to ensure high quality.

With our advanced technology and professional team, we can supply high quality products with competitive price and best service.

We we deal with a wide range of manufacturers in the local. However, all of our springs are designed with the same specifications and materials as the vehicle’s manufacturer. All parts that we offer are put through extensive quality testing before we ship it out.
All our suppliers (certified under ISO 9001:2000) carry out strict quality controls in order to get the best quality performance as required
It usually takes within 30days after the advance payment .?
We will send it out ASAP , usually 4-7days.
We can available delivery ways such as : DHL,TNT,UPS.
Free samples are available.
You can tell us the OEM number or detailed specifications.
Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
We are a specialized automobile leaf spring manufacturer, engaged in the research, production, sale and service of leaf spring for commercial vehicle since 1992.

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