To Mount Thread Plugs; To Replace The Sealing Strips - Husqvarna Automower 420 Workshop Manual

To ensure the threads in plastic parts are not damaged:
1. Carefully turn the screw counter-clockwise until it
engages the existing threads in the plastic. The
screw will fall slightly by itself when the threads are
located correctly in relation to the existing threads in
the plastic.
1 2
2. Screw in the screw to the correct torque as specified
Screw fasteners on page 43 .
in

6.24 To mount thread plugs

If the threads in plastic parts are worn, thread plugs can
be inserted. A repair kit containing thread plugs and
suitable metal screws is available to order.
CAUTION: Fit the thread plug carefully since
there is a risk that the screw bosses crack.
To mount a thread plug into a worn plastic thread:
1. Make the hole bigger with a 6.6 mm drill to a depth
corresponding with the plug.
2. Mount the thread plug with the screw that comes
with the repair kit and screwdriver.
40 - Repair instructions
3. Make sure the plug is screwed in completely so that
½
3
4. Fit the plastic parts with the accompanying screw

6.25 To replace the sealing strips

There are 2 sealing strips between the upper chassis
and lower chassis in the product. One between the
center console and the upper chassis and one between
the lower and upper chassis. Both sealing strips must be
replaced using the same technique.
1. Start by laying one end of the sealing strip in line
2. Continue laying the sealing strip clockwise around
a good seal is obtained.
CAUTION: Tighten by hand so as not to
damage the plastic.
instead of the old plastic screw.
CAUTION: A 5 mm sealing strip must be used.
Sealing may be deficient if the wrong sealing
strip is used.
with the marking on the chassis.
the lower chassis.
1191 - 001 -