Mounting Screws - Husqvarna Automower 420 Technical Manual

Alternative 2 - Counter-clockwise
Start by laying one end of the sealing strip in line with
the marking on the chassis.
Continue laying the sealing strip counter-clockwise
around the chassis half.
Lay the other end of the sealing strip above the first
end and then out of the channel. Fasten with retainer
on the bottom.
Note that one end of the sealing strip must lie outside
the channel on the 420/430X/450X, unlike other models
where both ends must lie outside the channel.

5.28 Mounting screws

It is extremely important how screws are mounted in
plastic. If the screws are mounted incorrectly, there is a
risk of damaging the threads in the plastic and thereby
shortening the service life of the plastic part. If threads
have been destroyed, the part must be replaced.
IMPORTANT INFORMATION
If the tightening torque specified in
5.30 Screw fasteners cannot be attained
due to e.g. the threads in plastic being
destroyed, this must be rectified by
inserting thread plugs or replacing the
whole part. If this is not done, a satisfactory
seal or function will not be attained.
To ensure the threads in plastic parts are not damaged:
1. Start by carefully turning the screw counter-
clockwise until it engages the existing threads
in the plastic.
2. The screw will fall slightly by itself when the
threads are located correctly in relation to the
existing threads in the plastic.
3. Now screw in the screw to the correct torque
as specified in 5.30 Screw fasteners.
For assembling larger parts in plastic, such as the top
of the chassis, it is important that the screws are tight-
ened crosswise. This is to avoid tension in the part,
causing malfunction or not attaining a seal.
English - 80
5. REPAIR INSTRUCTIONS
1 2
½
3