Hitachi Air Tools & Compressors - Popular Questions, Answers, Tips & Manuals

Unfortunately, you don't provide a Model number 'V73' is Version 7.3 of the Software running the control panel. They have model number like in the front page of this manual, and in this particular Manuals website you can use the search feature. https://www.manualslib.com/manual/1652200/Hitachi-Next-Series.html#manual ..

the regulator is used to control pressure. Is the knob turned completely clockwise. page 9 of instructions. Don't have yours copy and paste link https://www.metabo-hpt.com/docs/default-source/default-document-library/ec89_om.pdf?sfvrsn=51a32c66_0

I would check the main switch/speed control for a fault, assuming the battery is not exhausted that is.

notify a dealer or manufacturer

Question edited for full 'make model (what is is)', plus 'Hitachi'! Question moved from Televisions category to the correct one. I thought there may be a video, but there isn't. There is a previous Fixya question and other help in the link though. https://www.google.com/search?q=hitachi+ec119sa+replace+regulator+knob ..

if you replaced capacitor exactly like it was remove and no wires switched you have a bad motor.

check and test cut out may be faulty or failing

If u are talking about the bleed off that blows when the compressor shuts off. It should blow down for a short period then stop. If it dont stop your tank check valve is bad.

First, you have to determine how it is attached usually they are screwed or bolted into place or simply held into place by clips or pressure. But there are many different models so please post the model of your machine so it can be identified or even a photo.

8 ounces of Synthetic Oil SAE15W40

So the first (most obvious but sometimes overlooked) thing - check to make sure the tank drains are closed. Listen for a leak at the pressure switch - it will continue to leak after the compressor shuts off. If this is the case then you need a check valve (Part # 53A on the breakdown) If it builds pressure but not enough to shut off and there are no leaks I would look at the valves located in the head (Part # 14 on the breakdown) - piston rings are not a normal failure part on this model but could also cause this.

2 things The check valve on the tank will not close for 100% rust parts from some metal parts in the pressure pipe metal rings can be used and give problems over time , or under voltage on the power group. are sometimes things that are hidden and not seen .

Pressure gage A shows the pressure in the tank. Pressure gage B shows what you have adjusted the output pressure to be. If it is reading 0psi and it is new it is probably because the manufacturer has set it at that level. You have an adjustment valve on the front of your compressor. Rotate it until you see the pressure start to rise then keep going to where you want it set at.

Hitachi EC119SA 15 Amp 2 5 HP Lon Twin Stack Air Compressor Instruction...

here is a link to maintenance for these good luck Hitachi EC119SA 15 Amp 2 5 HP Lon Twin Stack Air Compressor Instruction...

insure that there is no debris ie., free from filings from the nails used or or ceck the feeder ports where the nail enters before it lives the port ( check for damage orifice or abstractions to it

Hitachi EC12 Portable Electric 2HP Oil Lubricated Air Compressor Parts Replace the entire regulator. You buy parts but you will be money ahead to buy a new one.

To remove the fan you will need a decent bearing puller - it is press-fit onto the armature shaft and doesn't come off easily.