Question about Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k

1 Answer

Check valve i have a 921 craftsman compressor 3.2 hp 60 gal and i keeps damaging the check valve, i replace two already and they get stuck

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Craftsman Master
  • 1,378 Answers

I have replaced countless checkvalves that were stuck open due to debris produced/ejected by the compressor. Most frequent problem was carbon deposits due to wrong type of oil in compessor. The carbon deposits form inside head and discharge hose. All carbon must be cleaned from head and hose when new checkvalve is installed. Use synthetic oil in compressor to prevent carbon deposit. Leaky valves and gaskets in the pump will also casue problems because this greatly increases the air temp discharged from the compressor. I use checkvalves pruchased from www.grainger.com. and not the sears valve. Good Luck

Posted on Jan 14, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What kind of oil do i need for a craftman 1 hp 3 gal 125 psi compressor m/ n 921 153101?..


For warm climate, use 30wt non detergent oil (lowest price $3). Med priced oil ($5), use compessor oil sold at Lowes or any major center store including Wal Mart. Compressor oil is special blend for higher temperature range (continuous use). High price oil, synthetic compressor oil works for heavy duty use under severe conditions (also sold at major lumber centers, cost about $8~18).
For lite duty, any oil that you have handy will work fine (check oil before every use). Good luck

Oct 03, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

2 Answers

A/C will only pump 30-40 lbs, but keeps running.


Maybe your unloader valve is stuck or damaged. This is found in the switch assembly and if it is faulty you should be able to hear a constant hissing noise from the switch .

Jun 05, 2010 | Craftsman 1 Hp, 4 Gal. Air Compressor

1 Answer

Air Compressor builds to 60lbs and no higher, does not shut off


the valve plate or the piston damage
wear and tear
take it apart and check
when installing use gasket maker to seal it back

Aug 03, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Leaks air at the pressure switch


start your compressor and let it buid up pressure to turn off. then unplug from power.lossen the fill tube that goes from the pump to the tank. when you loosen it. if it leaks air then your check valve is bad and will have to be replaced.

Dec 25, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Compressor will not pressurize


A simple check to see of the compressor is pumping is to remove the intake air filter and feel for suction. If the pump is working properly you will feel suction at the intake and the compressor will unload (speed up) when you restrict the opening. If no suction remove the head and valve plate and check the piston and reed valves for damage. Replace parts as needed. Parts are not expensive for small compressors. Good luck, enjoy.

Dec 19, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

Not finding what you are looking for?
Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k Logo

Related Topics:

232 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Air & Gas Compressors Experts

John Trevino

Level 3 Expert

1378 Answers

JOHN LAPIER

Level 3 Expert

2384 Answers

Brad Brown

Level 3 Expert

13529 Answers

Are you a Craftsman Air and Gas Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...