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Old 04-14-2018, 06:35 AM
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Air Compressor Repair

I'm about to tear down an Ingersol Rand Air Compressor to replace the head gaskets and related components. Has anyone done this action, and if so are there any tips/tricks I should be aware of. Not sure if the head gaskets should get any sealant put on them (i.e: copper spray tack).

Thanks for any input

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Old 04-14-2018, 04:57 PM
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Does it need head gaskets or just new reed valves?

https://www.hotrodders.com/forum/koba...re-444682.html
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Old 04-14-2018, 07:34 PM
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It blows air right out from the head when running. Builds minimal pressure and immediately drains down with air coming from the head area.
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Old 04-15-2018, 07:46 AM
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Be thankful you have a compressor that's rebuildable! My Northern Tools "NorthStar" has no available kit and it's limping along until I can find another pump that'll fit w/o fabbing a whole bunch of adapters...

Russ
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Old 04-15-2018, 08:20 AM
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I agree, it's an old compressor, but I don't want to buy a new one. This one is a 7.5 HP, 80 Gallon horizontal tank unit. Ordered parts last Friday, so I'll see how it goes and what I find. Will post my results when complete.
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Old 04-15-2018, 02:41 PM
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probably the reed valves are shot/broken, easy fix if you bought them along with the new gaskets
i typically resurface the valve body and head using fine sticky sandpaper on a flat surface
thick glass or a machined table saw surface works well for the flat surface
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Old 04-16-2018, 05:20 AM
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Thanks Ogre, I will definitely sand the surfaces prior to installation of the new gaskets. I will have to study the reed valve arraignment when I get it apart. Is there a need to apply anything to the head gaskets prior to installation? I looked up the torque specs and they say 75 ft lbs.
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Old 04-16-2018, 05:54 AM
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https://www.dexknows.com/business_pr...lc-l2039075549

Click on above. Great people for parts, service, and advice. They also go the extra mile to make up hoses for all kinds of hydraulics, air conditioning, or whatever.
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Old 04-16-2018, 12:30 PM
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never used any sealer on a compressor head

after rebuilding the 17 cfm reed valve compressor every year for 5 years we bought this beast
we blew a head gasket on this 38 cfm 15hp 3ph gardner denver monster currently in the shop
machined cast iron cups for valves that clatter intensely as the pressure builds to where you can't speek or hear within 100 feet
made a sound enclosure with egg carton foam and have a 220v furnace blower inside to cool it
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Old 04-28-2018, 06:48 AM
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Follow Up

Finally received the parts and removed the heads. The Low Pressure Side did not show any serious blow by on the lower head gasket, but the bolts were not very tight (around 20 Ft Lb torque). Replaced the upper and lower reed valves on the low pressure head along with the two head gaskets. Torqued the 1/2" bolts to 75 Ft Lb per Ingersol Rand Specs. Also noted the High Pressure Side had a cracked copper feed tube resulting in the compressor not reaching full PSI. Bottom Line: replaced all head gaskets with no sealant, all reed valves and torqued heads to spec. Changed Oil to 30 weight Synthetic and the compressor is running great.
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Old 04-28-2018, 10:11 AM
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Thanx for the update... no cracked reed valves? No leaking head gaskets? Just the cracked tube?
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Old 04-28-2018, 10:46 AM
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Reed Valves looked good, lower head gasket had some leakage, but no blow out, upper head gasket was fine. Biggest issue was the High side cracked line.
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Old 04-28-2018, 10:48 AM
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I think I'll go re-torque the head bolts on my air compressors! LOL!
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Old 04-28-2018, 12:43 PM
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not much going on inside a compressor with reed valves, just air pushing past the reeds in an enclosed space
your's was missing the enclosed space i guess
thanks for the update
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