DIY Air Compressor Pump Harbor Freight
MrMotofy MrMotofy
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 Published On Jul 1, 2023

5HP 145psi V style HARBOR FREIGHT #'s 60754, 67698
1.5qt of SAE 30 non detergent oil, Belt is A style
Turns counter clockwise pg 7
Needs a 240v motor of 22A to operate properly.

Bolt pattern 5 1/4" by 10" center to center
Real Dimensions 15" High, 13" Deep and 18.5" Wide at filters
Drain plug 3/8" NPT, a 3/8" x 5" pipe nipple works great with a cap to drain oil cleanly. Blue Loctite on the nipple to block hole.

Pulley/Belt Sizing-- 14.5" this Pump pulley diameter x 1050 pump RPM = 15,225 then / motor RPM (commonly 3450) = motor pulley diameter in this case 4.4 or a common 4.5"pulley. So 14.5 x 1050 = 15,225 / 3450 = 4.4”
There's a pulley size and belt length calculator https://www.blocklayer.com/pulley-bel... Match the A belt actual length indicated NOT the A belt number.
For reference about 15" pulley to pulley center. I needed a Dayco AP60 V-belt for my Ingersoll Rand unit, which is 62.3".
AP58 or a 4L600 = 60" ½" Wide V-belt
AP59 or a 4L610 = 61" ½" wide V-belt
AP60 or a 4L620 = 62" ½" wide V-belt
AP61 or a 4L630 = 63" ½" Wide V-belt

Output is ¾ JIS (standard Hydraulic fitting) or ¾ NPT
My pump output worked with 3/4” NPT. The included adapter threaded on perfectly to a ¾” pipe and a 3/4” copper 24” flexible Water Heater connector screwed right on. I removed the rubber washer inside fitting. The copper pipe makes like a flare fitting to tighten to. I used some pipe dope on threads and pipe end sealing surface and tightened it good, similar to a flare. Seems to not leak on either end. Other end just connects to a ¾” pipe nipple.
Or a ½ OD flare to 3/4” FIP (Female Pipe) Then regular flared 1/2” copper pipe etc

At 70deg ambient temp after 30min of break in run with open air no belt shroud, cylinder temps were 158deg
60 gal tank at 1min 50psi, 2:30 min 100psi, 4:10 145psi, 1:15 cycle 105-145psi

Parts 1-800-444-3453
13989 AIR FILTER ASSEMBLY 7 $14.39
13991 AIR FILTER ELEMENT 2 PK 9 $4.33
14002 CYLINDER GASKET 2 PK 18 $2.06


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