Fixing our Central Pneumatic air compressors
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- Опубліковано 21 жов 2024
- Not one but two compressors gone bad. At the same time too! Both are the Central Pneumatic brand from Harbor Freight, 21 gallon 2.5 HP 125 PSI MAX models.
I'm hoping these are quick, simple and cheap fixes. Let's see if these fixes work, if not I may have to strip them down and turn them into something else lol.
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#compressor #centralpneumatic #haslipcycleworks
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Stainless steel reed valves - amzn.to/3wwM1Wx
Pressure relief valve - amzn.to/3xube3R
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great video. mine wouldn't go above 25PSI. tried replacing the foot valve and cold start valve as recommended in the troubleshooting section of the manual, no dice. I didn't even know there were reed valves on the unit until i saw this video. I opened it up and one reed valve was split in half; ordered two reed valves and installed them. The compressor moves right to 125 PSI, so your fix was spot on. Then when it went down to around 85 psi it tried to restart but failed. Your video mentioned that you replaced the cold start valve on your 2nd compressor to fix this issue; I was puzzled because the cold start valve on it was brand new. So I put the old cold start valve back in and she now starts back up. The new valve is identical to the old valve but she wont start up with the new valve but starts right up with the old valve. Strange, but got my compressor back working. Thanks again.
@@dyinbreedband that’s awesome! Glad you got it sorted and running right again!
Thank you for this. I went to take the winter air out of my drum set to put in new spring air. But the air compressor just kept running as if it were Cleatus being surprised by his probation officer with a cup in his hand.
Now, thanks to this outstanding scholar, I can rest easy tonight knowing my air compressor just forgot how to reed.
Wow super simple fixes... thank you so much for taking the time to make this video.
Thanks for this video. You saved me a ton of time fixing my compressor. It needed the same reed valve.
@@victorshortt4917 awesome! Glad it helped you out. It’s always satisfying to fix something especially when it’s something cheap that keeps you from having to buy a new one.
A million thanks. You saved me a ton of time.
Outstanding video. Thanks for the video. Iv had one of those compressors for over 15 years and now I’m hoping to get more out of it. Thanks
Thanks for sharing this! You have helped many of us who are asked to fix things for other people. Have a great day!
Awesome! Glad it’s helped someone.
@@HaslipCycleWorks It did! I just opened the upper head like you did and found the broken reed valves! Have an awesome day!
I’m watching other guys take theirs apart like bro I know someone sells that part for less than $10. It’s not even worth rebuilding that relieve valve. Thanks for the video man.
You are absolutely correct 👍
Dude it is so refreshing to see the guy who knows what he's doing and shows you kind of the step-by-step on how to repair one of those I chopped it up to being their Chinese they break he got to go buy another one but it's awesome to see that you can get parts for him thank you so much for your video keep making more
Thank you! I really appreciate that and glad the video helped.
I just figured if mine ever breaks I will just use as an auxiliary tank if I can’t fix it. Thanks for the video.
Your video and explanation was much better than other on this same subject. Thanks
Appreciate that!
thanks, I was having the reed valve problem but I went ahead and ordered both parts
Never gave the cold start valve a thought. Mine is the snap ring type. I took it off the head and sprayed it with WD-40 and worked it a little. IT WORKS. Thanks so much for the advice and video.
That’s awesome!
Thanks, have exactly the same two different problems on two compressors. Saved me some trouble shooting.
That’s what it’s all about. Thank you for the positive feedback!
I needed this video , I have that exact compressor from Harbor freight in Lansing, I don't understand the Reeds ,but the left side was broken , that valve needs a new O ring I think . Will need this video saved to help get my compressor running again.
So glad it helped. Good luck with the repairs.
Saved me!!!!! Great straight to the point video
Reed valve…mechanical genius! Thank you! My CP air compressor is having the identical issue!
Mine exhibits similar issue, only goes to 25 lbs, then runs but no additional pressure. Will try replacing the reed valves.
The little brass component is called a Cold Start valve.
Thank you so much!! I have the stalling problem on mine. I thought maybe it was an issue with the capacitor, but it seems like I will try this as well and also replace the Reed plates while I'm at it.
👍
Good video, thank you. I’ve been searching for a diagram of the exact way it goes together. I have all the parts but not sure the order of reassembly. What order did you put back together? Starting from the compressor itself, cylinder, then one thick metal spacer that has the indentation for a reed valve, then the other thick metal spacer to hold the other reed valve, then thin metal gasket then the head? In your video, that thick metal piece came off with the cylinder head, but when you reassembled it, it looked like you were just putting the head over all the parts, lining up the holes, and bolting back together? Any assistance would be greatly appreciated, as I have reassembled it a few times, and it still doing the same thing. Turns on, makes a groaning sound, but does not start.
Thank you! Unfortunately, I do not recall the assembly order and no longer own these compressors. If I did, I would take one apart and send you pictures. I tried jumping on google to find a parts diagram but have come up empty so far.
@@HaslipCycleWorks thank you. Found one on Reddit. Got it going, but now it only hits about 80 psi, then keeps running.
@@dennisochterski7095 air leak somewhere? Did you replace anything?
Informational. Would have liked more info on how you diagnosed what repair was needed. Or were you just lucky? :)
I guess I didn’t elaborate on that very much did I? Generally if the compressor will stall on restart with air in the tank and trip the breaker it’s that small relief valve. If it runs and runs and runs and doesn’t make much pressure and just gets hot it’s usually the reed valve. Now sometimes you can have both conditions so I just played it safe and ordered 2 of each part. Always good to have spares on hand.
Thanks. mine is click and no start I was going to sell for 50 bucks but now I think I can go deeper and fix it. Thanks again.
That’s the spirit, it will be less than 50$ to fix. Also if you still want to sell it, you can get more if it’s running.
I replaced the cold start valve and circuit breaker still trips, I ordered a new American made circuit breaker coming in tomorrow. Ill repost the results. Thanks
Update:
Ok, so I replaced the reset circuit breaker and is now working like it should. If the valve replacement didnt work for you, next thing to replace is the circuit breaker. 👍
It’s the pressure switch. It’s ALWAYS the pressure switch.
I have 1 of those that just crapped out after 10 years I had an issue of it not shitting down I would have to turn it off then turn it on to use it. 1 day I forgot to turn it off and it smells burnt but still worked until I went to start it again now nothing. Probably going to replace the motor if I can find a cheap 1
Should be able to find one online. I think harbor freight used to sell the motors separately not sure if they still do.
@@HaslipCycleWorks I'm going to check with them today or look online
Hi you know where I can find the cold valve
Amazon has them for relatively cheap.
Have the same issue as 1st compressor, I hope it's as easy as yours was? Will definitely let you know and thanks for getting right to the point.
Absolutely! Glad the video helped. Definitely come back and comment if you got it resolved. Thank you!
Thanks for the great video, very useful.. any idea where to buy the oil plug?
Appreciate your help
Thank you for the compliment. Glad the video helped. I haven’t had the occasion to look for one but I’m sure it could be found on Amazon or EBay.
I bought the exact part but I can’t get my cold start valve to go into the threads it seems to be to big , why ?
Does your compressor look the same as mine? There maybe a difference between them or a change in the design.
great video, mine built up to like 80 lb of pressure and quit. the head and cylinder got hot as hell and started smoking! tore the head off bad Reed valves and the other gasket needs replaced also! can I get the other metal gasket along with the Reed valves?
Thank you! I’m sure you can. Amazon or EBay would be the first places I would look.
Great job man. Good to know that
Thank you
Any idea how many hours these had on them when they needed repair?
No sure don’t. Wish I would have kept track.
Dude you just saved a fortune
Yes sir, was super cheap compared to buying a new one. Plus if you see one for sale that’s not working this might help get it running on the cheap!
@@HaslipCycleWorks you read my mind. I was already browsing fb. Lol.
My problem exactly likes your number one unit, bough the valve on your link replace it still doesn’t work what else should I try. Thanks!
Did you replace the stainless reed inside the pump too?
where did you get the parts at?
Amazon, links are in the description.
Unfortunately I just ordered one. Thank you for the post
Fantastic informative video sir thanks 👍👍👍👍👍
Do you know where I can get the diaphragm for the cover on the oil drain side
I took a quick look but was unable to come up with anything. If you have the part number you might be able to contact them and ask for a quote for the part.
Any tips or tricks on how to keep that diaphragm in place when trying to put cover back on? It was taken off to drain the oil and now the seal isn't sitting down into the groove like it should so it leaks when it runs. I was going to mess with it again so I'm looking for videos. Did you happen to find out where to get a new one at?
I took that cover off to repair. The crank had bound on the piston (connecting) rod. Got that freed up. Now I can't get it to seat properly. I was thinking of trying to use caulk or "liquid gasket".
My compressor starts working and builds pressure up to 150psi but sometimes during work it will not start and won't keep tank charged. Sometimes it turns on only for a few seconds then goes quiet. Sometimes I hears something that it wants to start like air going somewhere through the pipe for about 2 second and then quiets and stays like that. Fails to keep up pressure in tank when I use it. Pressure goes low as 50psi but compressor doesn't start. Then I had to open drain valve to release remaining air pressure in the tank. Disconnect it from AC power for few minutes and it starts working again build up to 150psi again. I don't hear any air leaks. What could be wrong? How to fix it?
Sounds like you might have a couple issues. Is it plugged into and extension cord? If it is remove it and plug straight into the wall.
What’s the numbers on the second one you fixed serial number
Unfortunately I can’t look, I sold both of the compressors when I got moved into the new place.
Good to know info
Better than throwing them away and had to buy new ones, right?
I just picked one of these up for $100. It works but sounds like it is running rough/hard. My work horse compressor a 4gal kobalt quiet tech and I also got a little pancake compressor. But this one sounds way rough. Maybe I just have a bias but I'ma change the oil and pressure adjustment valve.
Also seems to take a little longer than the quoted 5-6min full time altho I only messed with it for about an hour before I decided I want to change the oil before I used it anymore.
@@scottouimet2865 check the metal reed valve too. Sounds like you are headed the right way with it.
@@HaslipCycleWorks thank you for replying to a yr old video. I'ma check out some more of your vids. Seems like the stuff I'm already watching.
@@scottouimet2865 appreciate that!
my compressor was running when power went off, power came on compressor stayed off. played with the switch nothing happened. I kinda believe that perhaps a valve is broken valve?? despret but hopeful.
Could be the breaker needs to be reset on the compressor.
Please help. Mine will hold air when I fill it from another compressor. The pump will not fill the tank at all but will blow up a balloon when I disconnected the line from the tank. I traded the relief valve with a closed cap. Thanks.
That relief valve serves a purpose. I would replace it with a new one. I would also check the steel reeds in the compressor itself like I did in this video.
I bought the new valve and it is to big to go in the threads why is it to big
Same model compressor? There may have been a change by the manufacturer.
@@HaslipCycleWorks same exact compressor 125 psi 2.5 hp 21 gal
@@brianmoretti6480 send me a picture of the valve and where it’s being threaded in to haslipcycleworks@gmail.com.
👀💪👊 always amaze me!
Thanks brother!
@@HaslipCycleWorks 🤜🤛
I just buy a used one, but it not going pass 40 psi, what could be the possible cause
The 3 items covered in this video could be the cause. It’s cheap insurance to replace all three especially on a used compressor.
@@HaslipCycleWorks I might have to change the gauge and pressure switch also
I wonder if I leave it to full up and the gauge still shows 40 psi. Can it blow up over pressure? Because I think the guage is the problem
@@brian13873 I wouldn’t do that just to be safe. One of mine did the same thing. It would run and run and not go over a certain point. I replaced the 2 valves and the reeds and it worked perfectly after that.
I will keep you posted when i change the two parts @@HaslipCycleWorks
👍😎👍
My reeds aren't broken but still won't build pressure
Could it be the check valve? If that doesn’t seal all you air will leave through it inside going into the tank.
I bet both compressors have faulty pressure switches. It’s ALWAYS the pressure switch.
Actually no, I thought that too initially.
@@HaslipCycleWorks I was shocked. It’s ALWAYS the pressure switch.
Two at once? Not two separate vids? Making it harder than it needs to be for the viewer.
A video that has been out for over 2 years and over 21k views and you are the first to complain about this.
Yep, I am a bitcher! BUT LET ME SAY THANK YOU VERY MUCH for the second fix. You are good at what you do. Just keep the fixes separated for those who watch only for their crisis du jour! THANKS SIR! @@HaslipCycleWorks
My compressor had both issues, see the post i just made today. If it werent for putting both issues in the same video i would have given up on the compressor and probably would have scrapped it. I'm glad he put both issues in one video.
I just replaced broken reed valve on mine, still runs non stop will only make small amount of air.
Replace the check valve as well.
@@HaslipCycleWorks Thanks
thanks, I was having the reed valve problem but I went ahead and ordered both parts
Good deal! Having the extra parts just in case is always a good idea.
😎👍🏻