It can be quite a daunting task trying to figure out how to change your Central Pneumatic Air Compressor Oil, how much to use and what is correct Central Pneumatic oil to use right? Well, fear no more, I will answer all these questions in relation to Central Pneumatic compressor oil for you.

Table of Contents

What Kind of Oil Goes in a Central Pneumatic Compressor?

It is extremely important to refer to your compressor manual before purchasing Central Pneumatic oil for your Central Pneumatic compressor. We have numerous Central Pneumatic compressor manuals available on our brand page so please visit here first!

The manual will tell you what Central Pneumatic oil is compatible with your air compressor, if you cannot locate your manual, please contact Central Pneumatic directly or visit their website to download a manual for your compressor.

Central Pneumatic Compressor Oils Available Online

I couldn’t find any Central Pneumatic compressor oils sold directly on Amazon but they can be found on the Harbor Freight website.

Alternative Compressor Oils Available on Amazon

A few alternatives to the Central Pneumatic advised compressor oils are produced by Mobil. Again, it is very important to ensure the oil is compatible with your air compressor before putting it into the system, so please check first!

The first is the Mobil 101016 Rarus which is suitable for reciprocating air compressors whether they’re single or multistage. This oil lubricant boasts excellent water separability, protection against rust and corrosion, long life for extended oil drain and provides your compressor with very clean air valves.

The second is the Mobil 100870, boasting similar benefits as the previous oil but potential to work with reciprocating, rotary screw and rotary vane compressors.

How Much Oil Should I Use in a Central Pneumatic Air Compressor?

Determining how much Central Pneumatic oil a specific model of compressor pump requires can be difficult without having the actual manual at hand.

You should contact Central Pneumatic directly or search the internet for the specifications of your Central Pneumatic compressor and its model to find the manual if you don’t have it.

I will now provide you tips on how to check the Central Pneumatic oil amount inside your Central Pneumatic compressor before providing you with a step by step guide on how you can go about changing it.

Central Pneumatic Air Compressor Oil Sight Glass

Below is an image of a sight glass which you should be able to locate on your Central Pneumatic compressor pump. This will allow you to check the oil level inside the pump, where it should be approximately half way up the red dot like in the image here.

Sight Glass
Typical Air Compressor Oil Sight Glass

Central Pneumatic Air Compressor Oil Dipstick

It is possible that the Central Pneumatic compressor pump will not have a sight glass, so you will need to check the Central Pneumatic oil level with the sumps dipstick.

Take the dipstick out of the sump and give it a good wipe clean. Now, push the dipstick back into the sump and then upon pulling it out check the markings on it to gauge the Central Pneumatic oil level.

Typical oil fill dipstick
Typical oil fill dipstick

Alternative Method for Checking Central Pneumatic Air Compressor Oil

Another possible method if you don’t have a sight glass or dip-stick on your Central Pneumatic compressor is to use a reservoir to drain the Central Pneumatic oil from the tank.

How to Drain Central Pneumatic Air Compressor Oil from the Sump

Start by locating your Central Pneumatic sump plug drain and unscrew it. This will allow you to drain the Central Pneumatic oil out from the sump and into a reservoir to gauge how much Central Pneumatic oil was in your pump.

Tip: Lay something out on the floor below the compressor like a dust sheet in order to avoid getting any spillages when draining the Central Pneumatic oil.

How to Change Central Pneumatic Air Compressor Oil

Of course, changing the Central Pneumatic oil on Central Pneumatic compressors can vary depending on the model of compressor you have. Before you begin, check the Central Pneumatic compressor model manual or contact Central Pneumatic directly to find out whether your compressor is definitely oil-lubricated.

Changing Central Pneumatic Air Compressor Oil Process

Follow the steps I have already described for draining the Central Pneumatic oil from the compressor into a reservoir or similar, and then securely tighten the plug back into the bottom of the sump.

Now you can add the replacement Central Pneumatic compressor oil you have at hand into the intake port at the top of the compressor sump. Please understand that it is hard to be any more specific than this due to the process potentially varying depending on the model of your Central Pneumatic compressor.

You should aim to add near to the same amount of Central Pneumatic air compressor oil that you’ve removed, or gauge it using the sight glass or dipstick if you have either.

Note: when you’re filling the Central Pneumatic compressor with Central Pneumatic oil, ensure you do not fill the air intake on the pump or overfill the sump and this can lead to significant damage.

Summary

The above methodology is simplified for ease into the following steps:

  1. Check the Central Pneumatic air compressor oil level
  2. Locate sump plug on Central Pneumatic compressor
  3. Drain the Central Pneumatic oil from the sump
  4. Securely tighten sump plug
  5. Locate the Central Pneumatic air compressor oil intake port
  6. Replenish the compressor with the same amount of Central Pneumatic oil as removed or gauge it using the sight glass or dipstick (do not overfill)

Without having access to every air compressor model manual, and assuming that the manual tells the reader what the Central Pneumatic oil volume is, there is no way to be anything but vague when providing advice about changing Central Pneumatic air compressor oil and the amount you should add.

Central Pneumatic Air Compressor Oil Troubleshooting, Solutions & Fixes

Is the oil sight also the oil drain?

Question:
by: Sonny
(Los Angeles, CA)

On the Central Pneumatic 67501 Air Compressor – is the oil sight also the oil drain?

Central Pneumatic / Harbor Freight model 67501 air compressor
Central Pneumatic / Harbor Freight model 67501 air compressor

Response:

Are you talking about whether or not the sight glass is the drain? Not normally Sonny, though there are some brands that require that. Not typical for Central Pneumatic, though.

Typically the drain plug is at the bottom of the sump, often below the sight glass.

I looked at a couple of photos of this compressor but neither showed a clear shot of the pump end.

I have uploaded a photo of the compressor with a couple of annotations showing where the oil fill and oil drains are typically.

The oil goes in via the fill tube which is located over the sight glass. Usually the oil drains from a plug installed at the bottom of the oil sump and often in line with and below the sight glass.

To drain the oil you have to unscrew the plug.

Bill


Where do you add oil? Compressor is making a loud noise.

Question:
by: Tom
(Agua Dulce, TX)

Lost the instruction manual. Think it needs oil. Where do you add it?

Response:

Hi Tom. Bit hard to figure where to add oil to your Central Pneumatic air compressor since you haven’t included model or HP, and there are many, many Central Pneumatic air compressors on the market.

First of, make sure your compressor model is oil lubed?

If it is, there should be a fill tube or oil fill cap near the bottom of, or adjacent to, the pump housing, and usually, below that, there will be a nut or bolt that can be removed to drain the oil sump.

The loud noise, if new, would suggest to me that you may be developing a vale problem, or that an internal gasket may have let go.

The model number and photo or two of your air compressor would sure help me help you too.

Cheers,

Bill


How do I properly use the oil dipstick?

Question:

How do I properly use the dipstick on my central pneumatic compressor?

I have Central Pneumatic Compressor but am unsure if I am supposed to screw in the dip stick all the way to check the oil level or just put it in until it stop without screwing it in. There is about 3/8″ of threads so it makes a big difference. The oil is so clear I can’t tell anything from the site glass.

thanks.

Response:

Good question. I’ve never read anything about this in any air compressor manual, but I can tell you that I screw the dipstick in all the way to take an oil level reading on my air compressor.

To me, not doing so would be like NOT putting the car dipstick all the way into the car engine to get a reading on that oil level.

Since the air compressor is meant to operated with the oil dipstick threaded completely into the hole, I suspect it is a safe bet to do the same when testing your air compressor oil level.

Cheers,

Bill


If you have any questions about Central Pneumatic air compressor oil, changing it, which to use and how to use it then please leave a comment below with photos if applicable to help others respond to you!