6L Ultrasonic Cleaner for Valve Bodies and Solenoids

A 6 liter heated ultrasonic bath sized for transmission bench work. Cavitation does the part of the job a parts washer and a brush cannot: it drives cleaning solution into the valve bore cross-drillings, solenoid screens, separator plate feed holes, and the blind passages in a pump body, and lifts out the varnish and clutch material that a spray wand just pushes around.

Runs at 40 kHz with a 40 to 46 kHz sweep so the standing-wave dead spots move around the tank instead of parking over one part of the load. Degas mode purges the air out of fresh solution first, which is the difference between a bath that actually cavitates and one that just makes noise for the first ten minutes. Ultrasonic power is adjustable at 180 W, and a separate 200 W heater takes the solution from 25 to 80 C. Heat matters here, because most water-based degreasers do not begin to break down ATF varnish until they are up around 60 C.

The 1 to 60 minute digital timer shuts the unit off on its own, and the memory function holds the last time and temperature you ran, so a shop cycling batch after batch of solenoid packs is not redialing settings every load. The 6 L stainless tank handles solenoid packs, accumulator pistons, checkballs, springs, small castings, and separator plates; measure a full valve body against the tank before you plan on submerging one whole.

Standard practice on the bench: strip the valve body, keep the valves in order in a tray, run the empty casting and the separator plate through a hot cycle, then blow every passage dry with shop air before reassembly. Do not run aluminum in a caustic solution, and do not put anodized or coated parts through a long hot cycle. Ships in a 15.6 x 13.2 x 9.35 in carton at roughly 12 lb.