Any one know about air compressors???

[TROOPER88]

Hi
I recently purchased a second hand ingersoll rand 150 litre air compressor.
I purchased it as I am going to be spray painting a whole vehicle. I began this morning with priming the bumpers and the like; all seemed ok.

After lunch I began priming the bonnet and noticed the the air compressor was only charging to a max of circa 60 psi. It is set up to reach 100 psi.

It will run and run but will not exceed 60! I am really annoyed as I had everying ready to go and this is going to really set me back.

If anyone can help please let me know or if anyone knows of a mobile service/repair company in the Middlesex area again please let me know.

Thanks

[Steve_D]

I'm sure if it was making hissing noises whilst running or running slow you wouls have said. In which case I would conclude the rings are not sealing or the valves are not sealing.

Steve

[TROOPER88]

Steve_D said:

I'm sure if it was making hissing noises whilst running or running slow you wouls have said. In which case I would conclude the rings are not sealing or the valves are not sealing.

Steve

Hi
Thanks for reply. To be honest it is no noisy when charging that you can not hear over the general noise.
I know absolutely nothing about compressors and I think that is half the problem!

It is strange as this morning it was charging to 100 psi and then all of a sudden started playing up.

I guess there is such a thing as mobile service engineers as it is far to heavy to take somewhere.

If any one else has any ideas I would be pleased to hear!
Thanks

[theconrodkid]

does it stop when it reaches pressure or run continuously?
could be pressure release valve if it runs all the time or the valve that switches it off when it reaches pressure,maybe the spring has broken.
if they are ok i would suspect the valves,they may be like spring steel/2 stroke reed valves and do break after time
oh and check the air filter isnt blocked.

[TROOPER88]

Thanks so far...

The compressor is shown below. It runs and runs yet will not exceed a max of 70 psi. I took the box off with the red button on and adjusted the spring but it made no difference. I take it this is the pressure release spring?
I also removed the black box shown in other picture which contained a sponge. Is this the air filter??

I desperately need it working (I have taken Tue and Wed off work to get it done.....)

I pressed the red button/or lifted it, whichever to turn it off at 65 psi and I can not hear any air escaping. What I can hear when it is charging though is a kind of beep/whistle which I think is just the fan belt but I may be wrong.

Are they easy to take apart or best left to the experts?

Thanks

[stevieturbo]

TROOPER88 said:

Are they easy to take apart or best left to the experts?

Thanks

Obviously that will depend on your level and ability !

I dont see why you would need to start taking much apart. Do you know if the gauge is even correct ?

Behind the gauge is the pressure control switch. But I dont see where you have answered the question, "Does the compressor run continuously and not build any more pressure, or does it run as normal but cut off at a lower pressure than you want ?"

If continuously, then you have a problem.

If it runs and shuts off as it should, you just need to adjust the pressure switch. Disconnect power and remove the black cover and there is a big spring inside. Add tension to this to increase pressure.
Refit cover and restore power and try again.

[LD1Racing]

Looking at the general state of it - have you checked the air filter? Looks pretty dusty to me.

[theconrodkid]

if it keeps on running,i would suspect the valves.

[Steve_D]

stevieturbo said:

....... But I dont see where you have answered the question, "Does the compressor run continuously and not build any more pressure......

In first post. Which is why I have surmised rings or valves not sealing.

Steve

[TROOPER88]

Hi
The machine runs contiuously. It reaches circa 60psi and the pressure will not build any more. It is defnot the gauge as I have a second gauge on the air line which reads the same.

Is the air filter the sponge contained the the black box in second picture? If so I have removed this and cleaned it but it made no difference.

So far I have check the pressure spring under the black cover with the red button on and this seems fine. I removed the top of the motor which allows you to see the top of the 2 pistons and I checked the gaskets at this area. All looked ok.

I believe the machine is working on 1 cyclinder as it is working only at 50%.

How do I go about checking the valves?

Thanks

[fatjon]

In the black box there is a diaphragm switch, check the rubber diagphragm isn't split. Mine had the same box on and the same syptoms.

[TROOPER88]

fatjon said:

In the black box there is a diaphragm switch, check the rubber diagphragm isn't split. Mine had the same box on and the same syptoms.

Hi
Do you mean in the black box with the red on/off button on?

[fatjon]

yes

[Incorrigible]

Is the drive belt tight ?

[YoungOne]

Might be a daft question but are you sure you need more than 60psi for your gun?
I do a bit of spraying and even the non hvlp guns don't need more than about 50psi at the gun.

[TROOPER88]

YoungOne said:

Might be a daft question but are you sure you need more than 60psi for your gun?
I do a bit of spraying and even the non hvlp guns don't need more than about 50psi at the gun.

60 psi would be ok if it maintained that. Its not.... Drops to quickly.

Purchased another compressor. Went with a cheap one but I am surprised of how good quality it feels for the money (£200).

100 litre tank, 14cfm and 3hp.

Tried it spraying yesterday and apart from the compressor running for most of the time whilst spraying it seems good.

I think you can connect tanks??? Would that mean I could use the tank on the old one (150 litres) combined with the new one to have storage of 250 litres.

Any one know how to do this?

[anonymous-user]

Yep, competely viable to connect the tanks, Make sure you use suitably rated pressure fittings however. (and of course lots of volume won't actually stop the compressor runing continuously! It will take a little bit longer to cut in, but if the air flowing out is more than the air in (i.e the maximum the pump can provide) then the system pressure won't increase and the pump will stay running)

[tinker-27]

look up gareth ( myv8v8 ) on monaro section is a compressor shop owner ,