Harbor Freight 5hp air compressor pump assembly video 3

[@davidfrank2824]

That's absolutely genius on how to get the oil out. Here's a quick little tip I picked up back in the 80s when I was racing and change different things would need new belts and not know what size. All you need to do is take a piece of string or thin rope run it the way it would if it was the fan belt. Then take a magic marker and where the two pieces mean make a mark. The way I did it where are the two pieces meet up I would make an X and market dare on where the X is. It makes it much easier to get the right size. I am enjoying your videos and I have already hit subscribed.

[@sdavidb5620]

That’s a great tip. Thank you.

[@jim1274]

I'm getting excited for the Start-up/Test run! Good job. Looks like a nice clean setup. Fingers crossed for a safe test run.

[@sdavidb5620]

Thanks for watching, working on wrapping up this project and getting the last couple videos done. It’s been a fun and rewarding project so far.

[@johndillian1018]

Thanks for the link to the fitting.

[@sdavidb5620]

Happy to help. I hope your build goes well.

[@mistersniffer6838]

@@sdavidb5620 - Hi, well, went to order the part. I think thats the wrong link. The manifold pipe is 1" thread fitting. Was that link supposed to be for the 1st brass fitting directly off the manifold pipe?

[@mistersniffer6838]

@@sdavidb5620 - Well, there are 2 brass fittings off the manifold pipe we have to use for this project. You do not have a link for the first fitting, and, the second fitting you DID link is FPT x FPT. All the compression fittings I have seen are fine thread FIP, like whats in your video (probably NPT x FIP). FPT you listed is a diff thread, so, there is a lot of mixed up info here. I guess I am gonna have to go figure out my setup on my own, but, hope you check it out and fix your links and info so it doesnt trip up others. Take care.

[@sdavidb5620]

@@mistersniffer6838 the link is correct. The first fitting is female g3/4 to male 3/4 npt. The second fitting I don’t have a link for is 3/4 female npt to 7/8 of compression fitting. Then there is the length of copper pipe with the two 45 elbows I soldered in. After that is another 7/8 Od compression to 3/4 pipe that hooks to the check valve.

[@mistersniffer6838]

@@sdavidb5620 - I went out today and found that 3/4" male pipe fit into my 1" threaded coupling (that I measured with a micrometer) that came with the compressor. I am not sure how/why they did that. 1" is supposed to be 1". I hate humans sometimes!! Anyways, I was gonna respond back and say I guess you were correct and in fact I was wrong. My humble apology's.

[@MartinMora92]

What tyoe of check valve are u using? How did u adapt the copper to the check valve?

[@robertskelton2576]

Next time use a belt length calculator on line for belt lenth.

[@sdavidb5620]

Thank you, did not know this was a thing. Here is one that I found with a quick search. www.omnicalculator.com/physics/belt-length

[@lylenelson7446]

Im thinking of using a 1/2 hydraulic hose to make the connection off the compressor fitting to the tank check valve. This would eliminate the hassle with bending tubing or pipe and soldering, ill let you know how it works.

[@sdavidb5620]

Yes, many people use hydraulic hose. It seems to also work well. I went with copper because I have more experience with it. That and I have a bunch of fittings here in my workshop. Good luck and enjoy your build.

[@daveynbeats]

thanks for the video im working on a similar setup and have a question(s) for you. What type of belts did you use? Also if you don't mind what length are they? Do you have a link? Im also curious about your motor, what rpm does it run and how did you calculate the pulley size to get it to match the max rpm of the compressor pump? I believe this pump is 1050 rpm max. Many thanks in advance.

[@sdavidb5620]

Page 7 of the owners manual gives you the formula to calculate pulley size. Belt length will depend on distance the pump is from the motor. I added about 4 inches to the mounting plate. Needed a bit more room to clear the check valve location. The belts are from my local farm store.

[@shimxininahi8024]

Part 3

[@martynotneuman8266]

where is the link for the fitting?

[@sdavidb5620]

G Thread (Metric BSPP) 3/4" Female to NPT Thread 3/4" Male Pipe Fitting Adapter - Lead-Free (3/4 inch) a.co/d/aSfEdJ5

[@martynotneuman8266]

@@sdavidb5620 thank you!

[@martynotneuman8266]

@@sdavidb5620 ordered..

[@sdavidb5620]

Your welcome, I hope Your Compressor build go well.

[@nickdoessht]

Thanks for this info! I suspected it might be BSP. I am in the middle of reworking my compressor from 94.

[@douglasmcgowan2372]

Speak up, low volume

[@sdavidb5620]

Working to improve audio on future videos. Thank you for watching