Matrix Home Compressor Not Filling Tank - What to Check and Disassemble First?

Hello!
Gentlemen, could someone advise me how to repair my Matrix home compressor, which at some point stopped filling the tank, and the engine and the characteristic ticking of the compressor can still be heard. What to disassemble first and what to check to remove this failure? I have never disassembled the compressor.
Can you give me some advice??
Regards

The first thing to do is unscrew the pipe that lets the air out of the compressor. Measure the pressure there. If there is no pressure there, it is possible that the valves are damaged. If there is pressure, look behind the compressor.

Hello!
I checked, I unscrewed the cable in front of the non-return valve and it blows heavily when the compressor is running. But when I emptied the tank, it only filled it to 2 bar. And so after each emptying. He simply can`t give it more, and the rhythm of the engine and cylinder is unchanged.
What to do next???
Regards

Hello, how hard is it blowing in front of this valve, are you able to maintain this pressure with your finger? Maybe the drain plug under the tank is open.

Hello. Maybe the filter is not good anymore

If the drain plug was open, condensate would flow out of the tank and the pressure would be 0. And it holds 2 bar and that`s it. I clean the air filter regularly, just as I keep an eye on the oil change and level.

I don`t know what blow-by you are talking about? After Christmas, I will disassemble the head, but I don`t believe I will find a fault there because it pumps up to 2 atm. I don`t know how to diagnose a worn ring. I`m surprised that it happened suddenly. Previously it was good at reaching 8 atm.

Quote:

I checked, I unscrewed the cable in front of the non-return valve and it blows heavily when the compressor is running

You`re doing this measurement weird. Take a pressure gauge and measure how much bar there is at the compressor outlet. You write that the tank only pumps up to 2 bar. Check whether the safety valve is damaged. Maybe it`s playing there. But the most important thing is to measure the pressure at the outlet. Do it and then we`ll definitely be able to help you.

I won`t measure it because I don`t have a pressure gauge, and besides, the cable is metal and it`s difficult to bend it to screw in the pressure gauge, and I don`t want to screw it up unnecessarily. I can feel the air coming in with my finger, I can`t even close it because there is no room there. I unscrewed the head. I don`t see any fault there. The valve is a plate with a hole in the top. It looks clean, as does the cylinder and piston with rings. I turned it back. He reached 2 atm again. and that`s it. It doesn`t blow anywhere on seals or lines. That`s it..

First you make a diagnosis and then you develop it.
And you have a pressure switch installed there. Maybe he`s the one who turns off the compressor.

I had such a case with a similar compressor - the head gasket failed, there was a leak between the suction and pressure sides, the head was quite poorly tightened

But it doesn`t turn off at 2 atm, it just keeps working but doesn`t increase the pressure. And the pressure gauge in front of the reducer shows as much and shows well as was checked when inflating the wheels, and the second one after the reducer also shows the same.
The head was tightened tightly, the seals were broken in half, but when screwed back together they fit properly. And there is no hissing or air leakage during operation.

I`m betting on one of the valves.

There are no miracles. Everything is fine, but it doesn`t pump. Only three elements can be damaged: broken rings, damaged valves in the head (or contaminated), and a damaged one-way valve at the compressor outlet. If it works, it must pump. Even a small leak under the head would not cause such a large pressure drop.

Andrzej_ M wrote:

the seals were cracked in half, but when screwed together they fit together as they should. And there is no hissing or air leakage during operation.

I have the impression that repairing this compressor is beyond you. This is a fairly simple device to repair. The gasket must be whole and not cracked, the valves can be assessed by eye to see if they are good or checked using another compressor.

If the rings are removed, you will have a lot of blow-by

As for the gasket, you will probably have a problem where to buy it, I will tell you that you can cut it out of cardboard and lubricate it with silicone.

After Christmas, of course, I will replace the seals! I`ve done this more than once, even at school. I have never disassembled the compressor, that`s why I`m asking here. I wanted to find out what happens first in this type. In the small Matrix I have, there is only one valve because there is only one piston. And I wonder how you would assess this valve by eye! It`s just a plate connected to another plate with a hole cut out!

Andrzej_ M wrote:

Hello!
Matrix who at some point stopped filling the tank,

This means that it is not wear due to overuse, but a failure. If it were otherwise, the compressor would gradually have problems with reaching the set pressure and not immediately drop to 2bar.


Maybe we`ll start from the beginning

If the compressor does not build pressure, it is either a lack of compression - that is, it escapes through the valves, between the piston and the cylinder, or through damaged seals.

if it escapes between the piston and the cylinder, either the rings are cracked or it is so worn out that there is an excessive gap.

Checking: You remove the head, the piston should have a minimum gap between the cylinder, you remove the cylinder, if the rings are not cracked or excessively worn and there is no threshold on the cylinder, you can assume that everything is OK. I will not write about the methods of checking the ovality of the cylinder and piston here because We repair professional equipment here

It escapes through the valves - there are holes and plates that cover them - it must be tight.

Check - the contact surfaces must be smooth and not bent, if the valve leaks, you will see dirty streaks in some places, where it does not escape it will be shiny.

leaks seals

Check: after disassembly, you can usually see whether the gasket is intact or not, if there was a leak, the gasket will either be broken or it will be visible that it looks different than in the place where it is tight.

If you don`t hear hissing, the gasket is probably leaking inside the head - between the suction and pressure sides.


I guess you can handle it now

Buddy Wowka!
Thank you for the extensive answer, tomorrow I will disassemble it again and make new gaskets. Then I will write what I observed
Regards

Buddy Wowka!
Done! I made new gaskets and tightened them with silicone and it`s OK! When I was cleaning the seal seats, I noticed that the alloy was darker on the thin wall between the suction and pressure chambers. It was probably a blown place under the gasket. I also browsed by. your part description. After cleaning, a slight abrasion on the piston is still visible. But now I will use this home compressor occasionally. Inflating the tires is a chore, hammering in staples with a stapler, blowing out the dirt. So it should last a little longer
Thank you