compair 75 wont stop building pressure
compair 75 compressor keeps building pressure to the point it cuts the 3 cylinder diesel motor out or overheats the motor,
i use it mainly to operate a jackhammer,any advice appreciated thanks, guy
Guy, it sounds to me as though the unloader valve / throttle assembly needs work.
If your manual doesn't cover that, maybe a reader here can comment.
compair c29p stalling
by steve lawrence
hi i have a compair c29p it starts and produces plenty of air and when i close the oulet valves the unloader starts to move but the engine stalls . any ideas??
1983 Compair holman compresser spits its hydro-lick oil out?
by Aaron kilkenny
(derby England UK)
hi iv got a 1983 100 psi compair holman road compresser with a welded air receiver fitted inside
the unit is over heating and spits its hydro-lick oil out out of the welded air unit
is there a filter i need to chage or certain oil i need for it? firstname.lastname@example.org or 00447971325098
COMPAIR 150 - motor won't start under load once belt is attached?
i have a COMPAIR 150, twin piston compressor, which is powered by a Lafert LM90 single phase 240v, 2.2kw, motor.
having bought it used, it initially worked fine, then began to struggle to start, within 24hours.
i found a 8mm bolt was used for a plug fuse! so upon putting this right, it simply blows a regular 13amp in an instant.
i replaced both the run and start capacitors, and have now replaced the motor start relay too, all for like for like parts, genuine where i could,
it will run on my bench, plugged into the nearest socket outlet, no problem at all, 100%.
so i remounted it on the compressor, attached the belt, wired it directly to the spur which is one the same circuit as the socket it was test plugged into, and approximately 10ft away, and it simply won't spin up, just stutters round, dimming the lights through current draw. there are no other major current draw appliances on the circuit.
take the belt off, starts up fine, changes over from start to run capactitor and winding in an instant, just a momentary dimming of lights and voila, she's up and running, 2800rpm,
the compressor turns by finger very freely, no out of the ordinary resistance at all, so i can't believe it is responsible for killing the efforts of a 2.2kw motor!
i have run the belt progressively slacker, to the point that i can peel it off the pulley by hand without adjustment to the tension, so can't be that.
I'm at a loss!
can it be as simple as its is right on the cusp of critical undervoltage/current supply to prevent loaded start up?
what amps should i expect this to draw upon start up?
please help bill????
i have spent a small fortune so far, a motor shop has tested my windings to satisfaction, and i'm no further forward and losing business!
Hi Shrew.... aaaaghhhhh indeed!
I'm am puzzled though. I did some resarch on your air ocmpressor, and the Compair model number 150 only ever returned info on a tow-behind air compressor.
So, I know nothing about your model. :-) Having said that, and based on what you have done so far, here's what I would do next.
Empty the tank and pull and clean the tank check valve.
Ensure that the intake filter is pristine, and you might even try to run it without the filter to see if that might (remote I know( be the source of the problem.
The next area would be the intake and pressure valves (that's a teardown, unfortunately) and if none of these are the issue, then I would surmise you have a load related pump failure.