Dear Patton,
It is a good idea to use ultrasound to try to break down the seized piston
in the Harbor Freight Cleaner. As it is probably somewhat underpowered, I
suggest that you suspend the part in the water and not let the weight
"dampen" the ultrasonic energy
(which actually creates cavitation- the formation of vapor pockets that
implode and give off a tremendous amount of energy as heat and pressure).
I suggest that you use either a non flammable solvent or water and a
detergent as a cleaning fluid. One way to test the strength of the tank is
to first make sure all of the trapped air is out of the liquid, and place a
piece of aluminum foil in the tank. Within a few minutes, the foil will be
literally filled with holes caused by the cavitation.
I would be interested in hearing your results.
Mark Goodman
66 BJ8 35503
Date: Sat, 3 Dec 2005 15:17:07 -0600
From: Patton Dickson <57healey@gmail.com>
Subject: SU - Piston Rod Stuck in the Suction Chamber
I have two sets of original type H4's for my 100-Six and I am going to
rebuild the spare set for putting back on the car. On both, the piston
rod/suction disk is firmly stuck in the suction chamber. Before I mess
something up and apply brut force, any other suggestions? I am thinking
finding a dowel or other rod and knocking it out through the oil hole.
I just got a Harbor Freight ultrasonic cleaner, so I am going to try that
out after I get the first one apart.
Patton
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