Thread: Air Compressor Desicant

150 C for 40min in convection oven

You could google microwave regeneration of silica gel dessicant.

In a lab they would heat it and cool it in a dessicator and weigh repeatedly till it didnt loose mass to prove it 100% dry

Thanks - that is great.

garry

Cooked the desicant - some beads were still blue after the 40 min so going for 60 min.

Next question - I have an exhaust valve kit to go into the Hitachi compressor however I cannot remove the big nut (17mm) without damaging it. Is there a way to remove the exhaust valve without wrecking it.

Pump.jpg

thanks

Garry

Is the exhaust valve buggered? Assuming the compressor is pumping OK, it makes a farty sound within a minute of starting the engine if its working OK
I bought the upgraded kit from 4x4 airseals to include the exhhaust valve kit
It came with a printed leaflet advising not to use the kit unless the old valve had failed. The risk of damage outweighs a routine valve changeout and the exhaust valves rarely fail
I took the advise and the original valve continues to work a year or so after the rebuild.

I have no idea if the exhaust valve is working or not(I assume it still is). Advice from a few different places was to put a kit in it when working on the compressor so i bought the kit after all it is just a O ring, spring and seal moulding. I wasn't expecting the force required to move the housing - if I apply more force it will wreck it so I am having to go with the exhaust valve I have.

Thanks for the input.

Garry

Some for information from the learned compressor gurus?

I assume this is the valve that opens and closes as the piston goes up and down in the attached pic.

Can someone confirm it is the right way around?

Pump 1.jpg

Also - if a AMK was to be fitted in place of the Hitachi the AMK will actually run without without its software upgrade but I understand the software patch is to lower its pressure.

Now I have heard there is actually a software update for the Hitachi that does a similar process - can anyone confirm?

Thanks

Garry

Originally Posted by garrycol

Cooked the desicant - some beads were still blue after the 40 min so going for 60 min.

Next question - I have an exhaust valve kit to go into the Hitachi compressor however I cannot remove the big nut (17mm) without damaging it. Is there a way to remove the exhaust valve without wrecking it.

Pump.jpg

thanks

Garry

As per other posts “if it ain’t broke....”

However, were you able to get the other bolts holding the exhaust valve off? Your pic shows the arrow to the lower left one. Try some Penatrene, or WD 40. Personally I’ve found the WD lawnmower cleaner work very well on corroded and especially alloys in freeing up bolts.

seems a bit odd that they offer a valve kit for the exhaust, then recommend not to service it.

Originally Posted by Eric SDV6SE

As per other posts “if it ain’t broke....”

Your pic shows the arrow to the lower left one. (I dont have photoshop and Paint does not do good arrows )

No is pointed to the large 17mm head of the actual exhaust valve - it will not move so I am not going to tempt fate.

I certainly accept the advice that Grappler provided about not servicing the exhaust valve but that is not consistent with many other posts on various LR forums. There were no instructions whatsover for my kit. If the exhaust valve was easy to undo I would replace it but as it will not undo without damage it is staying where it is.

Cheers

garry