working on mamouth unit putting in tandem scroll replacements after a ground out. put in first set in one unit no problems. installed another set in another unit first compresser comes up no problem start the secound hear grinding noise from both first locks up in less than a minute. got new one on warranty replaced number one. number two ran by itself all week just fine. start up the warranty one starts fine. start number 2 same as last time but this time notice oil glass on number one goes empty, 2 fills up 1 starts grinding and bam! tries to lock up. return tomorrow to start back on it. looking for anybody run into something similar?