This is a small oil-free silent air compressor. 35 liters, let's talk about the problem directly this machine Motor operation is normal It's just very slow The sound is a bit harsh So let's try it now We can see the fight for a long time The pressure gauge doesn't move. If something like this What is the reason? I believe that many of my friends will encounter this situation Then let's open the lid together. check it out OK screw has been removed We directly open the lid to it Well, now that the head is disassembled, We found that the cylinder head here has a valve plate First we have to doubt Is there something wrong with this valve? We check that the valve plate is not damaged There's no impurities in it. Indicates that the valve plate is no problem Then the lid is opened inside There's a layer behind this Let's take a closer look This hair piece is a little bit up. But that's not the direct cause Check here too look If this post It's still pretty tight. This one has been cleaned See it's not clean Usually, there will be dust in it when it is disassembled. This description has been cleaned up once before. But the problem is not solved Well, since this is okay, we have to suspect Is it the problem here? Let's take a look at this steel sleeve There are two steel sleeves here Let's pick up the steel sleeve and take a look Wow I'll take a look at this inside Grind a groove It feels like this Very rough let's look at this this seal Let's take a look at the lights Do you see it particularly severe wear That's where the noise came from then look at this The leather net is not good either. This way we can see this leather net After we put this steel sleeve on Look at a gap around here and you can see it Look at this leather net next to this The gap here is very large how do you say that is not it Did all this gas leak out? This must be the same You see, this is a little looser It's so relaxing Same wear and tear Then the problem was found Replace two steel sleeves two leather bowls I should be able to solve this problem for him. Next we go to buy two such steel sleeves Then buy two leather bowls and put them on it and it's ok All right I have already bought this accessory Next we will install These two screws are normally very tight because of the original It's all screw glue. We must pay attention when dismantling Let's try it first and see if we can move This is a 4mm Allen key. Let's try twisting it first See if you can move If it can't move, we'll heat it up Hey, the screw is fine Screw it, let's take a look at this this is also ok It can be twisted, no problem. Then we must pay attention before dismantling The two pistons have directions when they are installed we must not make a mistake If we are afraid of forgetting We can mark him with a marker So as not to forget when installing After the marking is done, we will dismantle it. to determine this direction If the screw in the middle is removed you can take it off Okay, the middle screw has been removed. Do you see it This is the opposite Do you see this direction? There are two protruding There are two recessed He installs it accordingly Take it off this one too remove it and take a look Now let's rub this dust on it dust on it clean up Next, let's not worry, take out the accessories Here are two leather bowls Then two steel sleeves Let's take a look at this new steel sleeve It's very smooth inside This surface has a layer A smooth, wear-resistant coating Okay now let's take a look at this leather net how to install Let's put this leather net first put it on this Then the direction must be right what's next We put this steel sleeve over this Put the steel sleeve on it and then install it again. From my personal experience I think it's more convenient Next is the hexagon socket screw. Dotted with screw glue Okay, let's put it on again Hold it here with your hands Tighten the screws OK Get this done Let's install this again screw glue then screw it Let's check if the leather net is installed properly. Next, install the middle cover This is also directional Put on this hood again Next we install the screws Done, let's try the machine again The switch is still leaking a bit. This place is a little leaky It leaked up through the system pipe. So let's turn the switch on now flip in the hair If the switch just leaked here After careful inspection Found out that there is a pressure relief valve on this side of the switch that is The pressure relief valve that the small copper pipe is connected to is leaking. This place is broken I replaced him with a solenoid valve This is much less hassle and more durable than the original Now the pumping speed is fast and the sound is not too loud let's listen It's over 8 now The pressure is a little high But this has little effect So the solenoid valve can also work normally normal pressure relief OK, then if this oil-free mute frame is connected Slow breathing The problem of harsh sound has been solved Today's video is shot here first. Thank you for your attention see you next time