9
Replacement of Cover Gasket for Padmount Switchgear Side-Hinge-2 Models
Field Service inStructionS
MN285009EN April 2019
7.2 Slowly peel up the cover gasket all the way along the
flange (Figure 41).
Figure 41.
7.3 Repeat step 7.1 and step 7.2 for each tank flange.
8. Clean the flanges
CAUTION
Falling debris .
8.1 Using a 3-inch putty knife or scraper, lightly scrape
the flange surface to remove residual gasket adhesive
(Figure 42).
Figure 42.
8.2 Apply isopropyl alcohol to a clean cloth or obtain
Kimberly-Clark WypAll X60 wipes or equivalent; then
wipe all residual adhesive films off each tank-flange
surface (Figure 43).
Figure 43.
8.3 Allow the tank-flange surfaces to dry.
9. Install new gaskets
ote:
N
Read all the instructions in this section before
beginning these steps.
ote:
N
When applying adhesive, you can start from any
side of the unit and proceed in either direction
(clockwise or counterclockwise); however, you
must work around the sides in contiguous
order, always proceeding to the next adjacent
side. Since the unit’s shape is rectangular, you
will alternate short and long gaskets (i.e., either
short-long-short-long or long-short-long-short,
depending on your starting point).
ote:
N
Once you apply the adhesive to a flange, you
have about one minute to place the gasket on
the flange. Once you tamp down the gasket to
spread the adhesive into a film, you have about
15 seconds to make any final adjustments to
the gasket’s position.
ote:
N
Use the diagram in Figure 44 as a guide
when applying the adhesive. As shown in the
diagram, apply a 1/4-inch drop of adhesive
between every other bolt hole on the tank
flange, one tank side at a time.
Figure 44.
Adhesive-placement diagram
9.1 Prepare the new gaskets:
9.1.1 Obtain the four gaskets (two long, two short)
provided in the Gasket Replacement Kit (see
Table 1 on page 1).
9.1.2 Inspect the gaskets for dirt, oil or powder
residue.
9.1.3 If necessary, clean each gasket using isopropyl
alcohol on a wipe or cloth; then allow the
gasket to dry.
9.1.4 Lay out the four cover gaskets on the clean
tank flanges, joining the corner puzzle dove-
tail joints to ensure the correct positioning of
gaskets. (See Figure 48.) At the bolt holes,
notice that the larger profile of the rubber is
towards the interior of the tank.
