taz24
13-10-2006, 07:09 PM
This was a good one.
I was working on a multi compressor pack that had six semi hermetic compressors on it ranging in size from fifteen hp up to fifty hp. The pack was a dual temp compound R22 system. I found it not maintaining the correct back pressure and started looking for the reason. I finaly narrowed the fault down to the fifty hp six cylinder, I did a pump test on it and found it to pump discharge pressure and also pull a vac. When pumped down it evan held the vac and discharge pressures:confused: . I removed the heads and found all pistons intact and all seals and valves intact. I then pushed one of the pistons down into the bore and it rotated lovely. The only trouble was only one other piston moved as well. I found the fault to be four smashed conrods. The thing was though the pistons were still in the bores and were therfore sealing the system so that the comp was working but only at a third cappacity.
Four conrods snapping and the comp still running and pumping:cool:
Cheers taz.
I was working on a multi compressor pack that had six semi hermetic compressors on it ranging in size from fifteen hp up to fifty hp. The pack was a dual temp compound R22 system. I found it not maintaining the correct back pressure and started looking for the reason. I finaly narrowed the fault down to the fifty hp six cylinder, I did a pump test on it and found it to pump discharge pressure and also pull a vac. When pumped down it evan held the vac and discharge pressures:confused: . I removed the heads and found all pistons intact and all seals and valves intact. I then pushed one of the pistons down into the bore and it rotated lovely. The only trouble was only one other piston moved as well. I found the fault to be four smashed conrods. The thing was though the pistons were still in the bores and were therfore sealing the system so that the comp was working but only at a third cappacity.
Four conrods snapping and the comp still running and pumping:cool:
Cheers taz.