Speedaire air compressors are sold by a very large industrial distribution company in the United States known as Grainger.
Over the years the Grainger name has become synonymous with entry level up to high-quality industrial level tools, monitoring equipment, ancillary equipment, and air compressors.
The Speedaire brand of air compressor is Grainger’s own house brand.
An image of one of their larger Speedaire air compressors follows.
Grainger’s range of Speedaire Air Compressors
Under the Speedaire air compressor brand, Grainger currently offers portable air compressors in the range of .33 CFM up to about 10 CFM.
Their stationary electric compressor line ranges up to about 100 CFM of air delivery at 90 PSI, with a range of tank and motor sizes.
Grainger also supplies under the Speedaire brand a full line of replacement compressor pumps and a variety of gasoline powered portable and stationary compressors.
Like many companies that sell air compressors any more, Grainger does not make their own air compressors. While not privy to the actual process, we expect that periodically Grainger reaches out to the compressor manufacturing community – and many of these firms are in the Orient (or have their compressor components manufactured there) – and gets them to bid on a job lot of XX-model of air compressor.
That means that your Speedaire Air Compressor model YYY that you purchased a few years ago, may not have the same manufacturer as the model YYY that’s available from Grainger today, even though it’s the same exact model number and overall appearance.
Speedaire Air Compressors Parts & Maintenance
Unlike many of the big box stores that sell various brands of air compressors, Grainger actually supports their brand.
You must understand however that they have been selling Speedaire brand compressors for decades, and no company, regardless of how big they are, stocks parts and service information for products sold 10 – 15 or even 20 years before.
Having said that, the first place to go for replacement parts and service information on Speedaire air compressors is Grainger themselves. We find their website, since it encompasses so many products, a bit hard to navigate, but do feel free to try.
http://www.grainger.com
As far as we are concerned though, if we need parts for a Speedaire air compressor, we will call them.
Need Help Finding Replacement Parts?
- Call 1-800-Grainger
24 Hours a Day,
7 Days a Week.
Make sure you have all the information needed to help them help you. Your Speedaire compressor model number will be the minimum, and you probably want to have the serial number of your compressor handy when you call Grainger as well.
More help with Speedaire compressor information
If Grainger cannot help you with getting parts for your older Speedaire air compressor, post a request on this page using the comment form below. It would be very useful too if you would upload a photo of your compressor. This will help others help you when you are trying to find parts or service for your Speedaire air compressor.
Hi, looking for a model number on my 1cylinder 2 hp speedaire compressor, blew up the run cap. and need a model number for proper replacement, serial number is there but grainger couldn’t find any info using it so gotta find the model number, it’s a large horizontal tank (50ish gallon) with the motor etc. mounted on top, any ideas as to where it might be?? Thanks.
Hey Folks, I could use some help identifying a vintage Speedaire air compressor I just acquired. There are NO identification numbers on the machine other than a couple of casting marks. It currently has a 1 hp dayton motor on it, but I don’t believe it is the original motor because the peckerhead was removed from the motor in order for it to fit. I need to identify the model to try to locate a manual as well as parts. The compressor pumps air but doesn’t build up any pressure. Thanks!
I Have a speedair in line 2 stage 5HP. It had a bad piston in also had a Campbell Hausfield v-twin that had 1 rod broken through the side of the block. The large pistons And rids of both compressors looked the same so I contacted campbell and asked about interchange. The lady helping me said that all compressors at the time where made by 2 manufacturers and yes they will interchange. And she gave me the campbell Interchange model number For the speedair. So i dont bother with paying more for speedair parts when i can buy campbell a… Read more »
I have a 60 gallon stationary air compressor align the pulley and still break the belt ran for two days
This is the 3z929 of my previous comment. Maybe its only 6 gal, the pancake pc its next to is 6 gal tho.
Have a speedaire 3z929, looks like about a 10 gallon tank I guess, tank is missing sticker so wondering how many psi its good for. Regulator threw sparks and the am thinking about pulling that apart to see whats what, but it was only giving me 40 psi before it diEd. cant find specs for this model, does anyone Have or know? Thanks!
Have a speedaire compressor which just “hums”
Does anyone know of a repair company in the riverside area?
I need an operators manual on 4tw29. Old model number 4yn50.
Hi Lawrence. Speedaire compressors are the house brand of Grainger Industrial Supply. They have offices nationwide, so your best bet to find the parts you need is to contact them with the model number and I’m sure they will help. Good luck.
I need to order speedier compressor cable s for model number 2MLW5 2HP/4 GALLON AIR COMPRESSOR. please let me know how can I order this.
The “manufacturer” of the Speedaire air compressor line is Grainger, so contact them for information if you will. The parts and service info is on their site here: https://www.grainger.com/category/brand/speedaire
I need a rebuild kit/filter, for a;
“Speedair #4z0294a” ( AirComp. Reg./filter). Also a owner manual/doc’s. Where does one access “Discontinued Product Info.” ?
If you’ve contacted Grainger, the owner and main supplier of the Speedaire brand of air compressors, they will likely help. In the event they cannot, here’s how to buy a new pressure switch.
The 5Z404 is the pump part number I believe. The PRV is letting go when the compressor is running so that would mean that air pressure under 75 PSI is flowing from the first to the second cylinder, and if the PRV pops open then the typical problem is with the intake valve on the second cylinder. Likely means a tear down of the pump to check it out.
What is the model number for replacement air switch for speedaire 4B234B
I have a speedaire 5z404 and the small safety valve (75psi) keeps popping open I am assuming air is leaking from the high pressure piston to the low pressure. Any idea what part would most likely need to be replaced?
Hi, I bought a 5hp Speedair air compressor with missing capacitor and I have the details of the motor down there.
Could you please help me to find the right capacitor for that.
Thank you
Motor: Doerr LR 13758 HP:5 RPM:1740 VOLTAGE:230 TYP:T
I was wondering if anyone has a manual for a speedaire m/n 2z157B or Know where I can aquire one. Thank you
That’s got me puzzled. Grainger doesn’t know what sheave fits their own compressor?
When you say they couldn’t determine which one is a double belt sheave, are there more than two? If two, shouldn’t both motor and pump sheaves be double?
I’ll ask the community if anyone else can help, meantime, if you Google “replacement double best sheaves” you’ll find a bunch. Pretty much as long as you know the sheave diameter, the shaft size, and assuming they are “V” belts, you’ll find a replacement that way.
Thank you. I looked . Which one is it? My unit has a sheave for 2 belts. I called grainger and customer service could not determine which one is a double sheave.
I’ve upload a photo of a Speedaire 8 gal Portable Air Compressor/Generator 4NB86 for folks to see what we’re talking about. I hope this is similar to yours, Craig. If not, please upload a photo of your compressor using the camera icon in the comment section.
When I did a search for “parts for a Speedaire 8 gal Portable Air Compressor/Generator – 4NB86” I see that Grainger still sells this compressor, and they have a sheave for sale. Please contact Grainger via their site : http://www.grainger.com and I expect they’ll be able to help.
I have a speedaire model 4nb86. I need the pully wheel that mounts to engine.
Like yourself, I’ve not been able to find any specs on the Z185A. What I can tell you is that each HP of motor size will typically develop 2-4 CFM of air at 90 PSI. If this loose guide will help, good. If not, I suspect you’ll have to contact Grainger. Have the compressor and pump model number and serial numbers available when you call. Good luck, and let us know if they provided this info will you?
I have a Speedaire 5Z185A and just need to know the CFM.
I think, based on the symptoms, that you might have a bum tank check valve. Power off, dump all the air, drain the tank as the air is bleeding down, then find where the air line from the pump head reaches the tank. That’s usually where the check valve is. Pull it, check it (blow against the check to see if air bleeds by) and if it does, clean or replace. I believe that will resolve the issue. Maybe leave a comment and let everybody know?
Hi I found this Speedaire 5z598c at an estate sale. Never really been used. It fires up and fills to 120psi rather quickly then the motor stops and a burst of air comes out until it hits 90psi, then the air stops coming out, the motor kicks back on and fills to 120psi and does the same thing again….over and over any ideas?
Krish, like yourself, I was not able to find any details about the 1Z784 by Speedaire. How critical is the information you need? I ask because as a general rule you should be able to get 3-4 CFM of air at 90 PSI for each HP of motor. Does this help at all? If not, another visitor may actually have the specs in digital format, and if they do, perhaps they would upload them using the comment form at the end of this page.
I need to get the speedaire compressor’s air flow capacity.
Model : 1Z784
HP: 5
Phase: 3
Stage: 2
Howdy. I guess, like us, you’ve spent a lot of time looking for comparison’s on line, with little or no success. In fact, the part number 5F566C isn’t even listed by Grainger any more, though I see there are still some parts for it available. Since this site is not at all affiliated with Speedaire / Grainger, it’s time for you to contact Grainger for the details you look for. As I expect you know, Speedaire is the house brand for Grainger, and they’ve got pretty good support on the phone. You’ll want the complete model number and a serial… Read more »
I need to replace my speedaire air compressor. My compressor is a 5F566C, I see in your catalogue that you have a 5F566. what is the difference???
Please let me know ASAP.
Thank you
Lloyd Lawrence
Richard, please check the part number of your compressor. According to Grainger – the distributor of Speediare – ALL Speedaire compressor models start with a number. It appears then that your SZ702D may be invalid.
I need a new pump for my speedaire compressor SZ702D model # for compressor pump #LPS030A
With all that you’ve checked, and assuming that the pump is running, I’d hazard a guess that you’ve got a valve or piston seal problem in the pump. Do you have a lot of air coming out of the oil fill port on the pump while the compressor is running? If not, then it’s quite possible either the intake valve is leaking, or the pressure valve is either or too. If so, it’s probably time for a pump rebuild. You can often find pump overhaul kits that have gasket(s), valve plates and sometimes pump piston seals too.
Good day, i have a speedaire compressor gas powered, starts and runs like a champ, only thing is the tank doesn’t seem to fill! Ive checked the release valve its closed, belts tight, & even get a small amount of air when hose is connected (5-10psi) any suggestions on what it could be?
It’s going to take a Speedaire person that recognizes the model number to help, and I’m sorry, but I do not recognize the model. You know that Grainger (the speedaire brand holder) has a help line at (1-800-472-4643). Contact them during business hours with as much info as you can off the unit, and see what’s what. In the meantime, I hope another Speedaire compressor owners recognizes yours and comments with more info.
I have what I think is a late 70’s or 80’s 20gal.(horizontal) speedaire compressor. I bought it at a car show got it home and plugged it in. It ran for a bit but then got hot and started to knock pretty bad. So with that said I need to rebuild the pump, funny thing about it is that there is no id info anywhere on the pump that I can see. It has a 1hp dayton electric motor. It does have 121 marked in the phase box on the tank tag all the other boxes are blank. I will… Read more »
Thanks for the question, Steve. Just wondered, since I can do the research on line too, if maybe the easiest thing is to contact Grainger directly?
Questions? Call us
1-800-GRAINGER(1-800-472-4643)
And if you can’t call, they have a help line on their site too.
I am sorry to hear about your motor being stolen. What a pain!
I have speedaire model 3JR77A. motor was stolen. what single phase motor and pulley can I use?
Hi George. If you meant to write Speedaire 22×72, I can’t find any model of that number in speedaire’s history. Is the existing device a Speedaire air compressor? Can you use an electric motor? To do what? Drive a compressor? But that’s what a compressor uses, so I confess to being puzzled by your inquiry.
I am in need of a small compressor that provides supervisory air to a fire alarm system that patentes date back to 1918. The existing one cannot be found so I was wondering if I can use a speedier 22vx72 . This is an air motor and wondering if I can power it with a electric motor to get app 20 ounces of air out of it. It would not run continuous but intermittent to hold system pressure of app 1.5 lbs thank you
You’ll want to get a tank with a total gallon-age comparable to the existing one, simply because that compressor pump is designed to fill that tank without overloading the motor. You can use a larger tank too, but need to be sure that the fill time does not exceed the duty cycle of the compressor. A smaller tank can be used, if doing so doesn’t cause the pump motor to cycle too often. That leads to unnecessary motor and pump wear. Having said that, you can use a tank from any source as long as the mounting plate can be… Read more »
I have a Speedaire 8hp, 8 gal, model 5f219, wheelbarrow type, portable air compressor. The tanks need to be replaced. Otherwise, the compressor is fine. Do you have any idea of where to find replacement tanks?
Marge, given that this model of compressor is current, it shouldn’t be hard for Grainger to help. Contact them here: https://www.grainger.com/content/help . You know the model number, but also check to see if there are any serial numbers on the motor information or pump tag if there is one. The more info you have when you call them, the more likely they will be able to help right away. Their help desk has been quite helpful to me over the years. Call, email or chat on line at the address I show above. Good luck. Could you add a comment… Read more »
How can I tell the age of a 4ME96 compressor?
Dave, I’m not an electrician, nor am I a compressor motor specialist. All I can hope for is that someone out there who is, can comment on your request. Sorry man.
Hello. I have bought a speedaire 4tk11. It has a 3 phase Electric motor 460/208-230 how do hook up 240 lv single phase to it. Or should put a single phase 240. On it.
Yikes. The page I found about the Model 5Z185 said 1991, and I typed 1961 instead. Sorry about that. I did provide some advice in my original response, Don. If the original had a 5 HP motor, and the pump was rated for that 5 HP motor, then I cannot account for why Grainger, the distributor for Speedaire, would tell you a pump that was run by a 3 HP would do. The proof will be in the the output. Check the specs online for the ouput from 5 HP driven pumps, and then for 3 HP pumps. That will… Read more »
Purchased new in 1990
I see that you don’t have any answers to my questions about pumps matching 5 HP elect motor
I talked to Granger and they wanted to sell me one that a 3 HP electric motor would run! if that would be the case why would Speedaire put a 5 HP motor on this unit that would cost more to run??
This is, I believe, a 1961 vintage air compressor, and as such, yup, parts will be hard to find. I also think this is a twin cylinder, single stage compressor. The first thing, if you haven’t already done so, is call Grainger as Speedaire is their house brand. You have the model number, also get the serial number from the pump, and they will direct you to an appropriate replacement pump. Or, visit the major compressor retailers in the area, look at their 5 HP compressors, find one that is similar to yours, get the pump number from the newer… Read more »
I have a Speedaire sixty gal.upright air compressor with a 5 HP electric 230 Volt motor and want to replace the pump because it is making lots of noise and takes forever to fill! My parts manual shows Model 5Z185 but I’m sure this has been replaced with a newer model part number I’m very concerned because the salespeople of various places want to sell me a compressor pump that they say is the same as the one I have but only uses a three HP motor, wouldn’t you think that since I have a 5 HP elec. motor that… Read more »