Question about Hitachi EC12 Portable Electric 2hp Air Compressor, Oil Lubricated
Tryed the methed john trevino spoke about I pulled the non-return valve off cleaned it still the same pull it out again took some sand paper sanded the plug reinstaled non-return valve works like new thanks for the info john saved me from taking compressor to the shop
Posted on Jan 10, 2012
Youor problem is actually the unloader valve. Your pressure switch is an older style Condor MDR21 (http://www.google.com/imgres?q=condor+mdr21+pressure+switch&hl=en&biw=1244&bih=739&tbm=isch&tbnid=SpfaC0uYVDGONM:&imgrefurl=http://www.bettervac.com/hitachi-881575-pressure-switch-condor-mdr-21.asp&docid=QTBY4coa024BpM&w=242&h=242&ei=qi2PTsbDKZCutwe2vMGsDA&zoom=1). The check valve is connected directly to the tank and the feeder line for the unloader connects to it, as well as the main line from the compressor pump. doing a little research on google you should be able to find one for less than 20 dollars. Or you can replace/upgrade your pressure switch to a newer model, which is shown in most of the manuals and parts break downs. Yours is probably the pre 2005 model. If you still need more assistance please repost with additional questions.
Posted on Oct 07, 2011
The most common problem with ec12 compressor is the non return valve part # 881-581 (check valve). The purpose of this valve is to hold pressure in tank. When the valve begins to leak, the air will be discharged thu unloader valve at the pressure switch. Simple repair, order valve from www.toolpartsdirect.com or you can use generic valve from www.grainger.com Good luck and post again if you have other question.
Posted on Sep 11, 2010
Hello. here is a link to a free downloadable owner manual and parts list. http://www.hitachi-koki.com/manual_view_export/pdf_manual_view.do?implementationWorkNumber=312&partsCode=C99128411&model=EC10SB(SL)+/+EC12&marketSeq=4
Posted on Sep 11, 2010
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Posted on Jan 02, 2017
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