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REEFER_ATL608
25-02-2016, 02:46 AM
Hello fellow techs i have a 2007 thermo king sb200 and i would like to know how do
i preform a three way valve test .this unit needs refrigerant about every two weeks. There is no visible leaks, i checked for leaks with a leak detector and also put nitrogen in the system and still can not find any leaks. I preform a low side pump to 25 vac and suction side rises above 0 on
gauges within seconds.
Can anyone help thanks

cadwaladr
25-02-2016, 03:46 AM
Throttling valve,there. Is a vent hole on the back of it test there,also compressor shaft seal maybe another leakage points plus the gaskets on the discharge manifold.

REEFER_ATL608
25-02-2016, 01:13 PM
Hey thanks i will test the throttling valve.later today do i need to have a compound gauge or can i check it with my manifold gauge. Also i replaced the shaft seal already, throttling valve gasket, and the discharge manifold gaskets and it's still been loosing refrigerant

cadwaladr
25-02-2016, 03:01 PM
There is a vent hole at back best tested with soap solution with unit not running

REEFER_ATL608
26-02-2016, 01:51 AM
There is a vent hole at back best tested with soap solution with unit not running

thanks i will try this and let you know the out come