21 - 2
Direct Glazing (cont'd)
Removing the Broken Glass and Old Sealant (cont'd)
1
Position the machine on level ground and apply the
parking brake. Stop the engine. Put protective covers
over the cab seat and control pedestals.
2
a
Laminated glass - leave installed until the old
sealant has been cut away, after which it will be
possible to lift the broken screen away from its
frame housing in one piece.
b
Toughened glass - remove as much of the
shattered glass as possible prior to cutting out the
old sealant.
3
Cut out the old sealant, leaving approximately 1 to 2
mm on the cab frame. There are several tools and
techniques for doing this:
a
Pneumatic Knife
A
provides one of the easiest
methods of removing the sealant around laminated
glass. The tool, powered by compressed air,
should be sourced locally.
Note
: This tool must not be used on toughened glass (see
WARNING on previous page).
(i)
Press the handle to start the knife blade oscillating.
(ii) Insert the knife blade into the sealant.
(ii) Slowly move the knife along the sealant with the
blade positioned as close to the glass as possible.
Do not allow the knife blade to overheat or the
sealant will melt.
b
Braided Cutting Wire and Handles
B.
This method
uses a 3-core wire, a wire starter tube and two
handles (see
Service Tools
).
(i)
Insert the steel tube
C
into the old sealant on the
inside of the glass.
(ii) Insert the braided cutting wire
D
down the centre of
the steel tube. If necessary, from the outside, cut
out local sealant at the point of the tube to gain
access to the wire.
(iii) Using suitable pliers, pull the cutting wire through
the sealant to the outer side of the glass.
(iv) Secure each end of the braided cutting wire in the
special handles
E
.
(v) Move the cutting wire backwards and forwards in a
sawing motion and at the same time gently push or
pull the wire to cut through the old sealant.
Section B
9803/3280
Section B
21 - 2
Issue 1
Service Procedures
S186380
S189870
S189880
A
B
D
D
E
E
D
C
C
