In a well-ventilated space, prepare the ultrasonic
degreaser unit by filling it with GRISOLVE MT-N,
to within 1 inch of the tank top. The ultrasonic
degreaser must then be energized for 2 hours before
decreasing operations begin; this degasses and
removes oxygen from the solvent, which increases its
cleaning ability. One hour before the decreasing
operation is to start, turn on the ultrasonic unit’s
heaters to heat the GRISOLVE MT-N to a
temperature of 120 to 140°F A stainless steel
bucket (14-quart) will also be filled with 3 gallons of
GRISOLVE MT-N; this is used to rinse the
broomed cable end after it has been cleaned in the
ultrasonic degreaser unit.
To degease, immerse the broomed end and
approximately 1 inch of the seizing into the solvent
in the ultrasonic degreaser unit tank (see fig. 3-48);
allow 10 minutes for the decreasing operation.
Every 2 minutes, slowly move the broomed end
around in the solution, back and forward and from
side to side, for approximately 15 seconds. This
allows air bubbles trapped between the wires to
escape, and ensures a more efficient removal of dirt,
grease, and preservatives.
NOTE
The cleaning solution must be changed after
10 uses.
Replace the rinsing solution when it
becomes cloudy.
After cleaning the broomed end, slowly lift it
out of the solution, allowing it to drain over the
tank. Now, rinse the broomed end in the bucket
of clean GRISOLVE MT-N for 30 seconds;
then remove it and allow it to air-dry for 5
minutes as shown in figure 3-48.
After the
broomed end has dried, inspect it to ensure that
all dirt, grease, and all other foreign matter has
been removed.
If necessary repeat the
cleaning/degreasing operation.
Figure 3-48.—Cleaning broomed-out wires.
3-53
