Hitachi EC2510E gas powered won't build pressure to max

by Ron
(Champaign, IL USA)

Hitachi EC2510E gas powered won't build pressure to max. whats wrong?


I have installed a new air compressor - problem started with original compressor.

Checked head gasket on Honda engine and engine valves - engine is strong.

has a new unloader and belt is tight and not slipping on sheaves.

Compressor just won't pump up.
Help.

I have been working on compressors for over 50 years.

Comments for Hitachi EC2510E gas powered won't build pressure to max

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Feb 04, 2014
low pressure
by: Doug in s.d.ca

OK. Let's KIS(S).

!st, do you have two of these beasts now?

When you start it, you:

Close drain cock,
Open (raise) toggle at unloader,
Start engine - let run awhile,
(what's tank pressure at this point?)
Close toggle (set horizontal).

Engine continues to run more or less full speed.

Pressure relief valve is closed,
Pressure at tank gauge does what?

Feb 04, 2014
no pressure
by: Ron

This is an Hitachi wheel barrow compressor mounted on the receiver tanks, tanks are only building to 50-75 PSI and no more. No indication of a leak. New Compressor (old compressor had same problem), new unloader, engine is running at proper RPM and Belts are not slipping.

Feb 04, 2014
No Luck
by: Ron

I have ran the compressor isolated from the tank but have nothing that I can adapt to the discharge to see what pressure is building up.

The braided discharge line when installed in the normal direction seems to have low flow and in the opposite direction the flow seems stronger with more force - suspect the braided discharge hose is bad but have no way of testing it.

I think the compressor is building pressure but can't get to the receiver.

Feb 04, 2014
pressure
by: Doug in s.d.ca

This is unclear -

Are you saying you have some system with a compressor which started failing to pressurise, and you put in a new compressor with no change?

That seems to point to a leak in the system.
You've isolated the compressor from the system and still don't get pressure?

Or what?

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EC 12 Hitachi air compressor

by russell
(kelseyville, ca u.s.a.)

Need wiring schematic from motor to pressure switch?
__________________
Russell, the page this redirects you to has the EC 12 manual on it for you to download.

Does it provide the information you need?

Inside the switch should be toggles to which you attach the supply wires (suppy or power or line) and motor toggles (load or motor).

Cheers,

Bill

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