Sealing; Escape Hatch Panel Assembly; Escape Hatch Frame - PREVOST H3-41 Maintenance Manual

CAUTION
Hinge assembly is critical and hinge should
never be removed from cover assembly.
Fasteners used in this assembly are special
and have critical torque requirements and
tamper-resistant heads
tampering.
FIGURE 23: ESCAPE HATCH

13.2 SEALING

1. Open and tilt up the escape hatch cover.
2. Join the 2 ends of the rubber seal.
CAUTION
Seal joint should be toward rear of vehicle.
3. Apply rubber adhesive CA-40 (Prevost #
681285) in the gap between the seal ends.
4. Apply Sikaflex 221 sealant (Prevost #
680532) along the outline of the escape
hatch on the roof of vehicle.
FIGURE 24: ESCAPE HATCH
to discourage
18104
18105
PA1621 Maintenance Manual All Series
SECTION 18a: H3 SERIES BODY

13.3 ESCAPE HATCH PANEL ASSEMBLY

The frame of the escape hatch is riveted to the
roof of the vehicle. The escape hatch panel
assembly can be replaced as a unit and a new
panel assembly installed in the existing frame.
To remove the panel assembly, remove the 4
bolts fastening the 2 hinges to the escape hatch
frame and retain the 4 flat washers. Reinstall the
panel assembly by fastening the 2 hinges with
the 4 bolts and flat washers removed earlier.
CAUTION
When installing, roof escape hatch's hinge
must be toward the front of vehicle, to prevent
the hatch from being ripped out if accidentally
opened while vehicle is running.

13.4 ESCAPE HATCH FRAME

When necessary, the escape hatch frame can
be removed and replaced in the following way:
1. Support the frame from inside the vehicle.
2. Remove rivets.
3. Cut the rubber seal with a sharp edge knife
and remove the hatch frame.
4. On vehicle top, using the knife, remove as
much as possible the remaining rubber seal.
5. Drill holes (if needed) in the new metal
frame.
6. Clean both vehicle top and new hatch frame
with SIKA 205.
7. Apply rubber adhesive SIKA 221 under the
hatch frame surface.
8. Install the frame in place and fix it with rivets.
9. Remove excess adhesive and clean all
around.
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Revised Sept 2019
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