Replace D and DL solenoid seats.Refer to Solenoid Kit #29292A.
If leak stops,this indicates a leak at the down solenoids.
Turn DA (Down Acceleration)adjuster in clockwise (CW)fully.
Back out seal nut on ML (Manual Lowering)screw one half turn.Turn ML screw in (CW) fully and re-tighten seal nut to insure good seat.
Close pit valve.If car still drifts the leak is in the jack assembly.
Send car to upper floor.Open main power disconnect switch.
Make sure the large recycle spring grips the shoulder of the piston tightly. Remove BPS closure and piston.Examine piston ring for debris and /or damage,it must expand after it has been manually compressed. (3)If car does not move,repeat procedure with UT (Up Transition)adjuster and U solenoid assembly. (2)If voltage is correct,remove US solenoid assembly.Visually inspect parts for foreign material and /or damage.Ball cage must operate freely within the solenoid tube.
(1)If car moves,check for proper voltage to coils.
Turn US (Up Stop)adjuster in (CW)fully.
If car is resting on bumpers,make sure main down piston is not open by manually closing it with the D (Down speed)adjuster.Turn D (Down speed)adjuster in clockwise (CW)to stop,then back out counterclockwise (CCW)to it’s normal position (count number of turns in and out to avoid lengthy adjustment).
Make sure gate valves are open in system as required.
Check valve for proper sizing in accord with adjustment instruction.