• For the clean supply, ATF is continually consumed as transmissions are filled.  As ATF is consumed, more is added to the system operating tank from a separate storage tank (that receives ATF from tanker trucks).  Electric heaters in the system process tank and the clean tank heat the fluid to maintain constant temperature (typically 120 deg. F). 

 A small side stream of fluid is pulled from the clean tank and runs through a vacuum dehydrator to remove moisture.  This side stream then passes through a heat exchanger to cool the fluid that was elevated to around 170 deg. F for the dehydration process back to the operating temperature in the system tank.  Fluid is returned to the system process tank from the test stands where it is then processed through primary bag filters before going to the clean tank.  ATF is then pumped from the clean tank through secondary filters for continuous supply of temperature controlled ATF to the test stand.  A pressure sustaining control valve maintains the supply header at design pressure.

• For the reclaim portion of the system, contaminated ATF is returned to the system from the repair bays.  The fluid is pumped through bag filters to remove contaminants, then through a dehydrator to remove moisture.  The ATF is then pumped through a water content monitor to ensure it is at a minimum level before the fluid is sent to the system process tank to service the clean supply portion of the system.  If the moisture level is too high and it then re-processed through the reclaim dehydrator before re-testing.

 Water content monitors are located at three points in the system to alarm if there are high moisture conditions.  There are monitors after both the clean and reclaim dehydrator, as well as a small side stream off the system supply pumps to monitor the % water content of the ATF being supplied to the test stands.