If you own a Bendix air compressor, you may eventually need to replace the unloader valve. This valve is responsible for releasing pressure when the compressor is not in use.
Over time, it can become damaged or worn out, which can cause problems with your compressor. Luckily, replacing the unloader valve is a relatively easy process that anyone can do with just a few tools and materials.
Table of Contents:
- Why You Might Need to Replace the Unloader Valve on Your Bendix Air Compressor
- What Tools and Materials You Will Need
- Step-By-Step Instructions For Replacing The Unloader Valve
- How to Test if the New Valve is Working Properly
- Tips for Maintaining Your Air Compressor
- FAQs in Relation to How to Replace Unloader Valve on Bendix Air Compressor
- Conclusion
Why You Might Need to Replace the Unloader Valve on Your Bendix Air Compressor

Over time, this valve can become worn out and need to be replaced.
In some cases, it may also need to be adjusted or cleaned.
There are several reasons why you might need to replace the unloader valve on your Bendix air compressor:
1) The Most Common Reason Is Simply Because of Wear and Tear.
Over time, the moving parts in the valve can start to wear down, causing it to become less effective at doing its job. Eventually, this will cause problems with how well your compressor works overall.
Replacing the unloader valve is an easy way to fix this issue and keep your machine running smoothly.
2) Another Reason You Might Need to Replace Your Unloader Valve Is If It Becomes Damaged Somehow – Perhaps Due to a Manufacturing Defect or Accidental Damage While Using or Storing Your Compressor.
If any part of the valve breaks off or gets bent out of shape, then it won’t work properly anymore and will need replacing as soon as possible.
Any damage like this should be covered under warranty by Bendix so make sure you contact them first before paying for repairs yourself!
3) Finally, if neither of those two issues sound familiar, it could just be that something has gone wrong with how the valve itself was installed initially.
Incorrect installation isn’t usually too serious but will still require the unloader valve to be taken out and put back in correctly – hopefully by a professional so you don’t void your warranty!
If you’re having any issues with your Bendix air compressor, it’s always best to consult a professional before trying to fix it yourself.
However, if you think the problem might be with the unloader valve and you want to try replacing it yourself, here are a few tips:
1) Make Sure You Have All the Right Tools for the Job.
You’ll need a screwdriver (preferably Phillips head), an adjustable wrench, and pliers.
- Carefully unscrew the old valve from its housing using the screwdriver be careful not to strip or damage any of the screws!
- Once you have removed the old valve, take a pair of pliers and bend any sharp edges on the new one so it will fit into place more easily.
- Put the screws back in loosely at first so you can adjust the position of the new valve during installation if needed.
- Once you’re satisfied with how everything looks, tighten the screws and test out your compressor by turning it on for a short while to make sure no air is leaking out!
Replacing an unloader valve is generally a pretty easy process that anyone should be able to handle given some basic knowledge and understanding of how compressors work.
However as always – when in doubt about something relating to your Bendix air compressor – don’t hesitate to reach out to a professional or contact customer service for help!
What Tools and Materials You Will Need
If you’re planning on replacing the unloader valve on your Bendix air compressor, you’ll need a few tools and materials. First, you’ll need to purchase a replacement valve.
You can find these at most hardware stores or online retailers that sell air compressors and parts. Next, gather some basic hand tools like a screwdriver, wrench, and pliers.
Finally, locate an oil catch pan to collect any residual oil from the old valve. With these items in hand, you’ll be ready to replace your air compressor’s unloader valve like a pro.
Step-By-Step Instructions For Replacing The Unloader Valve

If your air compressor is having trouble building up pressure, or if the pressure relief valve is constantly being triggered, then it might be time to replace the unloader valve.
This isn’t a difficult task, but it’s important to follow the steps carefully in order to avoid damaging your air compressor.
Here are step-by-step instructions for replacing the unloader valve on an air compressor:
- Turn off the power to your air compressor and disconnect it from any external power sources.
- Remove the cover from the unloader valve by unscrewing the retaining bolts with a wrench (usually there are two bolts).
Be careful not to lose any of these small parts!
- Take out any O-rings or gaskets that were sealing around the old valve and discard them you’ll be installing new ones anyway.
- Install new O-rings or gaskets onto the new valves according to manufacturer’s instructions pay close attention so that they’re installed correctly!
- Carefully insert the new valve into place, making sure that it is seated properly before proceeding further.
- Screw on the retaining bolts securely to finish attaching the new valve.
- Reconnect your air compressor to its power source and turn it back on.
- Test the sprayer gun by pulling on the trigger while pointing it towards a safe area.
- If everything seems in working order, you’ve successfully replaced the unloader valve.
How to Test if the New Valve is Working Properly
After you have replaced the unloader valve on your Bendix air compressor, it is important to test if the new valve is working properly. To do this, turn on the air compressor and let it build up pressure.
Then, turn off the power and release the pressure from the tank by opening the drain valve. If there are no leaks or other problems with how the new valve functions, then it has been installed correctly.
Tips for Maintaining Your Air Compressor
As a garage mechanic or DIY remodeler, you know that an air compressor is a handy tool to have around.
But did you know that there are some simple maintenance tips that can help keep your air compressor in good working order?
Here are just a few:
- Check the air compressor regularly for leaks and make sure to tighten any loose fittings.
- Drain the tank daily to prevent moisture build-up, which can lead to rusting of components.
- Change the oil every 3 months or as specified in your owner’s manual – this will help prolong the life of your air compressor.
FAQs in Relation to How to Replace Unloader Valve on Bendix Air Compressor

How do you replace an air compressor unloader valve?
If your air compressor has an unloader valve, it is a device that helps to regulate the pressure within the pump.
The unloader valve is located between the air tank and the compressor pump, and its main function is to release pressure from the compression chamber when the unit is not in use.
Over time, however, these valves can become worn out or damaged, which can cause problems with your air compressor.
If you notice that your air compressor isn’t working as well as it used to or if it’s leaking air, then it’s probably time to replace the unloader valve.
Here are some instructions on how to do just that:
1) First of All, Make Sure That You Have Turned Off Your Air Compressor and Disconnected It From Any Power Sources Before Beginning This Repair Project.
You don’t want anyone accidentally turning on the power while you’re working!
2) Once You’ve Done That, Take a Look at Where the Unloader Valve Is Located – Most Likely Near Either End of Either the Discharge Line or Intake Line (Hoses).
There will be two ports connected by a small metal rod; one port will be larger than another.
The large port should be facing downwards so gravity can help with draining any liquids inside
3) To remove old parts such as O-rings or gaskets surrounding the ports (optional), use compressed air to blow them out gently until they come loose enough for removal by hand
4) Next using needle nose pliers grip and pull out the retaining pin completely
5) Carefully remove old o-ring(s) gasket(s) (optional), taking note of their size shape for replacement later on
6a) For reassembly purposes only:
install new o-ring(s) only if removing old ones was part of Step 3 above; make sure they’re seated properly in their grooves before moving onto next step
6b):
For reassembly purposes only:
install new gasket(s) only if removing old ones was part of Step 3 above; apply compressed air over each side several times until snug
7):
Insert retaining pin into hole at bottom of the housing making sure not too protrude from other side
8):
Using needle nose pliers or similar tool gently tap to portions of the housing where thickness has been reduced by previous step until flush with rest of the surface
9):
Repeat Steps 1 through 9 for second unloader valve if necessary
How do you check the unloader valve on a Bendix air compressor?

The unloader valve on a Bendix air compressor is located on the side of the unit, near the top. To check it, first make sure that the power is off and the unit is cool.
Then, remove the cover plate by unscrewing it. There will be a spring-loaded plunger inside; if this isn’t pushed all the way down, then the unloader valve needs to be replaced.
Where is the air compressor unloader valve?
The air compressor unloader valve is located on the side of the air compressor, near the top. It is a small black knob that you turn to release pressure from the tank.
Conclusion
This is a relatively easy task that can be completed in just a few minutes with the right tools and materials.
Simply follow the step-by-step instructions below and you’ll have your compressor up and running again in no time.
If you’re looking for information on buying, owning, and using an air compressor, Air Compressor Total is the place to go. We offer a wide range of services pertaining to air compressors, and our team of experts is always available to answer any questions you may have. Give us a call today!