Cab Structure - jcb JS300 Service Manual

Direct Glazing
The following procedures explain how to correctly remove
and install panes of glass that are directly bonded to the
cab frame apertures. When carrying out the procedures,
relevant safety precautions must be taken.
1 Always wear safety glasses during both removal and
replacement.
2 Use protective gloves - heavy duty leather gauntlet
type gloves when cutting out the broken glass; 'non-
slip' type gloves when handling/moving panes of
glass; surgical type
polyurethane adhesives.
3 Wear protective overalls.
4 Do not smoke - the activators and primers used in the
procedures are highly flammable.
5 Do not attempt to handle or move panes of glass
unless you are using glass lifters.
Several special tools are required to successfully complete
the removal and replacement procedures. Reference is
made to the tools in the text. The majority of these tools
can be obtained locally and the remainder from JCB
Service (see Service Tools).
The work must only be carried out in a dry, frost free
environment. A protective canopy may be required or the
machine/frame must be moved to a sheltered area. In
damp or wet conditions, hinged doors and window frames
can be removed from the machine and taken to a more
suitable (dry) environment.
Glass should not be replaced at temperatures below 5°C
(41°F).
!M
WARNING
Laminated glass must be handled with extra care to
prevent breakage. Wherever possible, store and
handle it in a vertical attitude. When placing or lifting
the glass in a horizontal attitude it must be supported
over its whole area, not just at the edges.
BF-1-8_1
B-35

Cab Structure

TB-002_6
gloves when using the
9813/5100-1
Section B - Body and Framework
Removing the Broken Glass and Old Sealant
!M
WARNING
Always wear safety glasses when removing or
installing screen glass. Never use a power operated
knife when removing the sealant around a toughened
glass screen. The action of the knife could cause
particles of glass to be thrown with sufficient force to
cause serious injury, even when safety glasses are
being worn. Use only hand operated tools when
working with toughened glass.
BF-2-3_1
1 Position the machine on level ground and apply the
park brake. Stop the engine. Put protective covers
over the cab seat and control pedestals.
2 If a laminated pane breaks it will stay in one piece
even though the glass is cracked. A toughened pane
will shatter and fall apart. The method of removal of
the glass depends upon which type it is.
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.
provides one of the easiest methods of removing
the sealant around laminated glass. The tool,
powered by compressed air, should be sourced
locally.
Cab
Cab Structure
K Fig 1. ( T
B-36). This
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