central pneumatic air compressor 42321 manual

I have ordered replacement parts twice on line each one of them arrived with wrong threads. I cannot find the manual on line and Harbor Fraight help line cannot find the darn thing. I am frustrated. Can anyone help. I noticed that the threads all seemed to be slightly off for some reason. The copper pipe is just a tad to wide. I had to grind the compression fitting a little bit to make it slide on to the pipe. I think they must have gotten a good deal on all the pieces because they didn’t meet the standard in production. I have to use a lot of Teflon tape on the threads to get them to deal properly. Jb weld might be useful. I also had to replace the pressure switch. It’s almost not worth repairing the compressor unless you are stubborn like me and have to try fixing things before throwing it out. I don’t see anything hard stamped. You will have to call Harbor Freight at 800-444-3353. Make sure you have the item number of your nailer. Sometimes you. Is this normal? Is the dipstick failing. What can I do to fix this?. You need to order that from Harbor Freight. Customer. It is the right overall diameter and I used a hole punch, slightly oiled, in my drill press to put in the four screw holes.. Harbor Freight Tools, or take piece to hardware store. Need a top gasket and a plastick cylinder ring.Where can I get it online? Try this To fix the diaphragm gasket in my Dad's. If you still need a copy, let me If so, then it. They even have one model of a gas-powered, wheelbarrow style, that is quite well priced. This line of compressors is entry level. I don’t believe they are made for serious compressed air use, where whether or not a compressor works means that trades persons do or don’t do work that day. I just wouldn’t put the supply of my plants air system at the mercy of this particular brand. Their entire line is similar or identical to compressors of other brands with different colors and different labels.

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SKU 42321 For technical questions, please call 1-800-444-3353. WORK AREA. Running the Air Compressor with no oil or with low oil will SKU 42321 For technical questions, please call 1-800-444-3353. When filling the Air Compressor with oil, make sure to unscrew (do not pull) the Oil Fill Cap to remove. These carry important information. If unreadable or missing, contact Harbor Freight Tools for a replacement. WARNING! People with pacemakers should consult their physician(s) before using this product. Electromagnetic fields in close proximity to a heart pacemaker could cause interference to or failure of the pacemaker. For easy connection or removal, a quick coupler should be installed on the end of the air output. Note: Use pipe thread seal tape on all threaded connections. SKU 42321 For technical questions, please call 1-800-444-3353. Setup. Turn the Air Flow Valve to the appropriate pressure. Warning: Do not make any repairs, adjustments, or maintenance on the air compressor unless it is disconnected from the electrical power and the tank pressure is released. Parts List “A”. Parts List “B” NOTE: Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts. Please use the Contact page if the manual you need is not listed and I’ll do my best to track it down. A lot of times wheel sizes are shared across various equipment. It’s a pancake model. Please see above. Thanks. Any help would be appreciated. Thanks How can I get it? Would you please add it to the list? Thank you. Are you sure it’s not the 97080 which is included above? Bought at a sidewalk harbor freight sale. It has a hand written number on it no tag. Need a filter assembly. Any suggestions. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.” We’ll work on updating the links above. We’ll work on updating the links above. The check valve is cracked and leaking.

It arrived yesterday after a week delay and got it installed. Nothing has changed. Any suggestions. I did the math from the HF manual and installed 4.5? pulley on electric motor. I just started to build the air compressor a week ago June 10,2020 the parts have been in my garage shrink wraped until I needed them. I have a HD 60 gallon tank. The pump gets close to 25 psi and slows to trip the electric motor if I dont throw the on off switch. I have changed the start capacitor and run assist capacitor with no change. Checked the reed valves were all good and put new gaskets on the valve plate and head.i changed out 2 different pressure switches and 2 capacitors. I am out out ideas and watched videos asked people at HP and everone tells me to change the parts I have changed please can some one help me. Central pneumatic. I am looking for the regulator for this compressor model 60637. Any help. It runs and builds pressure but does not hold pressure. New hose and fittings. Still does not hold for very long. And it is taking along time to build pressure. Less than 2 months old. The reset keeps popping when its time to fill. Start of day. Motor not hot. Tries to start then pops. Any ideas? Also where would I get the same motor or one that works better yet is compatible to this compressor Model: 61454 21 gallon 125 psi I let it sit outside forgetting it was there and didn’t change the oil. I ran it for about a year here and there doing small stuff but this week I turned it on and heard a snap and the motor went to running super smoothe. The connecting rod broke. I can’t find one. I’ve emailed hf and no answer yet. I’d like to fix it if it’s available. Its been a great small compressor. Thanks for your input How do i find a model number. Can you help The second picture where am I holding it with my hand is the stock one Compressor model 61454 2.5 hp 21 gallon Hasn’t been used much at all. Model 61454 21 gallon 2.

I could be wrong and will be happy to indicate so if someone can provide proof that HF actually makes their own compressors. Aside from pressure switches, gauges, regulators, PRV’s and check valves (all the same as those found on many other brands) there are very few repair parts for the compressor pump or the motor. Parts from other Central Pneumatic air compressors can often be used on other models of this brand. If you can scrounge or buy a non-working compressor, some parts from the old can be reused to fix others that have failed. Depends on your skill level as to whether or not this works for you. Include the model number of your compressor.I understand that I can unsubscribe at any time. I since then have gotten the compressor running although it will only occasionally build pressure, and even then it only gets to about 20 PSI. I took the top of the cylinder off and the small metal plates now refuse to stay in place. Is there something else I need to do to get it back working or should I just replace the compressor with another that I have? Someone told me it might be the pressure sensor, but want another opinion form someone that may know from experience. Also if it is the pressure sensor or something else, where can I buy the right part? When it starts again, it runs very slowly until it eventually trips again. Sometimes it will run normally and stay running at the normal higher rate of speed and then eventually return to the slow speed until it is stopped by whatever it is that is tripping the reset. Any ideas as to which direction to look to solve this problem? Tank check valve seems ok ( no visible signs to indicate faulty and no air leaks from anywhere when tank pressurized). What else could it be. Thanks in advance. Also the cold start valve went out as they ALL DO ! A few weeks ago it would not shut off at the high pressure level approximately 150PSI. The PVR goes off and the motor does not shut down. I ordered a new switch thru Amazon.

The 5th time, I noticed that the compressor ran for a longer time than normal. I could feel the air being by-passed out the relief valve. WOW, found two of them stripped.Thanks Central Pneumatic. I replaced it. Still didn’t work. After checking things I found on the internet about it, plus taking the head off and checking reed valves, it still wouldn’t work. I removed the air filter and the start valve popped out and started filling with air. I replaced the whole filter unit. Works great! It is a couple of years old. About 2 weeks ago, I noticed that it would not pressurize past 75 psi. It then dropped to max of 50 psi a week later, and now it won’t go past 25 psi. Any suggestions? Do these compressors have a serial number on them or is it just the model number? Does not build up pressure into tank. Pressure directly out of crankcase. What do you think problem can be??? Neither air gauge (tank or outlet) is registering any pressure. If I pull the relief valve there is air pressure. Also air is released when the drain valve is opened. There is no pressure using the air hose and attachment. Tried other tools with same weak response. I am in need of a pressure switch and I called for a replacement and was told they do not make replacement parts for this compressor. Does anyone know of a compatible pressure switch for this model? I am sure I can get the brass fittings and I have the gauges, just the regulator piece to control pressure would have to be added can you assist me on finding the right one? I’ve been to several places that sell compressor parts and was told that harbor freight does not share information about their products. I also checked with a couple of harbor freight to see if can get a part number or someone point me in the right direction and no one could. No breaker would jump or anything else. Sometimes it would pump to 6 bar, sometimes to 2,5. Expected Pressure switch failure, replaced with new one. No difference yet.

5 hp pressure switch 125 psi Any help on part numbers or where to find parts. Thank You! Is it available or can you recommend a generic I can get a few parts out of. Parts and orings just under the knob. Thanks I stepped on the manifold coking to the tool side of the regulator and the manifold is broken in two places. Any suggestions for where I can purchase a new manifold that would fit. Compressor, gauges and regulator all work great. Thanks I live in South Louisiana! I need replacement. Where in the world can you find one. Searched the web. Going to visit my HF in the morning. Thanks! I have to keep it held up while I pull the plug. It will stay up when the compressor is not running. I’m guessing I need to just replace the switch, Anything else I should check before doing that? Am I missing something obvious? I contacted Harbor Freight and they don’t sell them. So my questions is will these fit my air compressor? Back up to 105psi, shuts off and bleeds very rapidly down to 50psi and starts running again. I just replaced the pressure valve with a like one — seems to be doing the same thing. Ideas? It looks to me like the screws have a round head rather than a hex head which makes no sense, except if this is a way to keep owners from servicing their unit. The compressor is about a year old, and has about 5 hours of use on it. Any information on this will be welcome. Used to work fine. Can’t find one anywhere. The adjusting knob is stripped. Compression rings and oil rings and gaskets. It wont cut off after reaching pressure. Tried the reset switch and got nothing. Is all hope lost? Thank you Can I get some ideas on what to troubleshoot that could be the problem for this compressor. My dad does have the original manual and I called the customer service number but they were not very helpful. Tried taking to a repair shop and were informed they do not work on Harbor Freight compressors I then noticed it would not fill at all. Any chance in finding a new one?

It appears to be pressure build up on the piston head as I can release down to 20-30 psi and it will work. Thanks in advance for any help. The relief line or Unloader tube as called got broke.Do you know the size of this fitting? Thank you. When you add a comment to any page or post it will show first here to enable assistance from other visitors. Stan Sizemore on What is a compressor cold start valve. Error: Try Again Ok Sell Watchlist Expand Watch List Loading. Something went wrong. View cart for details.User Agreement, Privacy, Cookies, Do not sell my personal information and AdChoice Norton Secured - powered by Verisign. Cluttered benches and dark areas invite accidents. 2. Do not operate compressors in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Compressors create sparks which may ignite the dust or fumes. 3. Keep bystanders, children, and visitors away while operating a compressor. Provide barriers or shields as needed. ELECTRICAL SAFETY 1. Page 4 6. Use safety equipment. Always wear eye protection. Make sure you are wearing your protective clothing, safety glasses with side shields and dust mask or air respirator, if appropriate. TOOL USE AND CARE 1. Do not force the compressor. Use the correct compressor for your application. The correct compressor will do the job better and safer at the rate for which it is designed. Never attempt to force the compressor to provide more pressure than it was designed for. 2. Page 5 cause damage to the equipment and void its warranty. Refer to the “Operating Instructions” section for details on filling the Air Compressor with oil. 2. When filling the Air Compressor with oil, make sure to unscrew (do not pull) the Oil Fill Cap to remove. 3. Use eye and ear protection. Always wear ANSI-approved safety impact eye goggles, and ear plugs when using the Air Compressor. 4. Page 6 15.

THIS AIR COMPRESSOR MAY REQUIRE A DEDICATED ELECTRICAL CIRCUIT AS THE AMPERAGE DRAW UNDER FULL LOAD, COMBINED WITH USE OF ANY OTHER ITEM, MAY OVERLOAD YOUR CIRCUIT. 16. Always turn off the Air Compressor in the event of a power failure. 17. Performance of this Air Compressor may vary depending on variations in local line voltage. 18. Maintain labels and nameplates on the Air Compressor. These carry important information. If unreadable or missing, contact Harbor Freight Tools for a replacement. Page 7 Setup Dipstick Warning: Fill compressor with oil before using; running with NO OIL or with LOW OIL will void the warranty. The optimal capacity of the oil reservoir is 7.8 ounces of oil. The Dipstick is used to determine if oil is needed. Never operate the compressor without sufficient oil. Use a 30 weight, non-detergent compressor oil. To check the oil: 1. Unscrew the Dipstick. 2. Check the level of the oil. There are two lines on the bottom of the Dipstick. Page 8 Operation Caution: Prior to use, inspect the compressor or any damaged parts or unsafe conditions. Make any necessary repairs before using again. Leave open until the next use. 4. Clean compressor with a damp rag containing mild detergent and water. Do not use flammable liquids or solvents. Please try your search again later.When max air reached it dumps all air. When turned off it again dumps all air in tank. A proper switch will not do this After I replaced my switch the compressor runs better than when new. I replaced the one on my 21 Gallon vertical Harbor Freight compressor. Any safety switich on model 95386 central pneumatic?It's really easy to lose sight of.It's really easy to lose sight of. I've only used it 3 times in 10 years, and each time I couldn't find it on my first two attempts. But it's easy to see once you've found it. The manual is available for download. That may help, if my directions don't.It's really easy to lose sight of.

Seems the pressure switch works and gives power to the motor. Breaker switch does not jump, no reset needed but the motor just has a mind of his own. Need assistance in replacing the plug. I need to get a replacement Cylinder Gasket (part 16 from the manual). Any idea where I can get one? I followed al of the instructions making sure that oil level was proper. Initially the compressor would not start at all. After a few more attempts it would run for about 15 to 20 seconds then trip a breaker. I guess there is no factory acceptance testing done on these all. I will be taking this back tomorrow for refund and Not a replacement. I am very, very disappointed by the lack of acceptance testing is a thing of the past of I guess for this product as well as about everything else. It runs fine but wouldn’t build pressure over 40 psi. I checked the reed valves and one was broken. I order a new set and in the process of fixing it I broke the exhaust tube. Any idea where one could be bought from. Would it be worth it to try to fix it or just carry it back, I still have a couple of days to bring it back. I got it real cheap and I’m kinda thinking to just try to fix it. I will use it for air tools but not very often, just to work on my own cars some. Thanks Geneo I am finding that the valve that controls releasing pressure from the tank to the tool is not opening.I used it Thursday just fine started today and it wont build pressure. Help I cured mine by putting a tee in place of my cold start valve and then put 2 cold start valves into the tee. They still close at 2.5lbs of pressure but it takes a second longer to close allowing the motor to get up to speed. Working like a charm now... Only this time i drained the HF compressor oil and filled with Mobile 1 full synthetic 5w 20. Also loosened up that start valve right next to cylinder head so it was still snug but not tight. Drilled 3 more holes in air filter housing.

Since doing this it no longer trips either house breaker or motor breaker on cold start or any start thereafter. Is actually a useful compressor now. Tripping breakers and breaking reeds was a constant issue before. Havent had either happen since. Thought Id throw that out there to help others because HF most likely will not. Good Luck. I nedd a compositor for it where can I get one? What is the problem? Where do I find a replacement diaphragm. Doesn’t really push in at all. Zero pressure on guage, compressor never shuts off, just keeps goin. How can I address this? Im sure they are engineered to last just outside the return policy window but if it gets even light use it will become apparent that it only looks like a functional compressor. I will not buy another big item from Harbor Freight until they show some interest in customer satisfaction. Air pressure would not build over 20 PSI. Replaced reed valves and it came up to 120 PSI and cut off as normal. As I released air with blow gun as pressure dropped, the compressor wouldn’t kick back on. Completely drained tank and again tried on off switch and it would not come back on. When go to turn on it runs for about 5 seconds then kicks the reset button on motor out. Started out intermittently now does it everytime no matter how much air pressure is built up. It was bought brand new 2 years ago. Any help is appreciated thanks Harbor Freight customer service states they do not carry the part. Don’t need a 10 paragraph response! It compresses the air to about 145psi the drops to 125psi as it should. The problem is that no air discharges from the tank which is full. I found no clogged lines and believe I need a new Out-put regulator. Harbor freight does not have spare parts for this compressor. What can I do? Any ideas on the problem. It doesn’t have a start capacitor so that is out. Does the run capacitor have a dual purpose. Thanks for your help. Can I get a replacement part for it. Thanks in advance for your help.

I've only used it 3 times in 10 years, and each time I couldn't find it on my first two attempts. But it's easy to see once you've found it. The manual is available for download. That may help, if my directions don't. View and download free manuals and users guides.Compressors create sparks which may ignite the dust or fumes. 3. Keep bystanders, children, and visitors away while operating a compressor. Provide barriers or shields as needed. ELECTRICAL SAFETY 1. Grounded compressors must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. FOR TECHNICAL QUESTIONS AND REPLACEMENT PARTS, PLEASE CALL 18004443353 SPECIFICATIONS ITEM DESCRIPTION Power Consumption 120 VAC, 60 Hz Motor 2.5 HP (rated), 34. Al rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express writte. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.All rights reserved. No portion of this manual or any artwork con tained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing improvement. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to conti. All rights reserved.

No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Please upgrade your browser or activate Google Chrome Frame to improve your experience. To make sure your air compressor is running efficiently, it is important to check your oil level regularly and to know how much oil your compressor needs. The manual will indicate exactly how much oil you should add into the sump for your model of compressor. Once you have read the manual, you should be able to locate the oil sight glass on your compressor. It may be found on the base of the pump for reciprocating type compressors or on the sump tank in a rotary screw compressor. In the middle of the sight glass, you will see a dot. Ideally, you want the oil level to be in the center of the dot. If the oil level is below the dot, your unit needs more oil. If the oil level is above the dot, you have added too much oil. When oil is added, it is usually filled near the top, which is why there is a common misconception of having the same practice for air compressors. However, filling your compressors oil sump to the top can cause significant internal damage to your unit. When excess amounts of oil become aerosolized by the compressor’s discharge, it can cause damages not only to your compressor, but to any pneumatic tools and accessories that are hooked up to your compressor. Oily discharge can also ruin your end-product, sometimes to the point where projects must be scrapped and reworked entirely. Any spray painting, sanding or the application of finishes would be ruined by oil entering the airstream.

With preventative maintenance, you’ll greatly reduce the risk of having projects ruined by the interference of oil in your compressor’s airstream Chicago Pneumatic has been around for over 100 years because we offer reliable and hardworking air compressors, as well as expert advice and support. The root of the vibration can stem from multiple sources, some internally and others externally. Understanding the cause of the vibration and how to resolve them will be critical in keeping your compressor in proper working order. One of the most common things we see in the industry are air dryers being stored on top of the compressors. Seems like a wasted space not being used on top of the compressor, right? Wrong.