Change the front rubber bellows on Husqvarna Automower G3

Change the front rubber bellows on Husqvarna Automower G3
Here is a step by step guide of how to disassemble and replace the rubber bellows on the Husqvarna Automower G3 (320, 330X, 420, 430X, 440, 450X)
The rubber bellows are next to the lift sensors and are at risk of getting damaged by rodents or cracking from wear and tear. That's why it's important to make a habit of always checking the rubber bellows before starting your robotic lawnmower in the spring.

Changing the rubber bellows is a simple process and doesn't require any special tools. See below for step by step instructions.
At the bottom of the page there is a list of the spare parts needed for the job.

Tools we use: Torx screwdriver T20, ring spanner size 13.

Step 1: Turn your Automower over and disconnect the power cable. First remove the rubber cap; then disassemble the charging connector.	Step 2: Detach the chassis. You do this by holding the lawnmower as shown in the picture and using your right hand to pull the chassis upwards. It's attached by two points on the back and two on the front.
Step 3: Unscrew all the screws around the chassis. 14 in total.	Step 4: Lift up the top of the chassis. Disconnect the long flat white connector that goes to the motherboard according to the yellow marking. Put the bottom part of the chassis to the side.
Step 5: Unscrew the three screws according to the markings. Turn the chassis over.	Step 6: Use a size 14 ring spanner to unscrew the knob.
Step 7: Now pull the rubber bellows off the holder. This is done by folding them out from the sides and threading it along.	Step 8: Thread the new rubber bellows onto the holder and attach the washer and knob. The washer sits in a groove. Make sure it's fitted correctly.
Step 9: Tighten the three marked screws.	Step 10: Get out the lower part of the chassis and connect the flat lead from the upper part to the motherboard. Change the sealing strip in the under-chassis at the same time.
Step 11: Screw back all the 14 screws around the chassis.	Step 12: Put the chassis on the robot by placing it on all four points simultaneously. Finally, connect the charging cable and press the rubber plug back into the lower part of the chassis.

Tools we use: Torx screwdriver T20, ring spanner size 13.

Step 1: Turn your Automower over and disconnect the power cable. First remove the rubber cap; then disassemble the charging connector.

Step 2: Detach the chassis. You do this by holding the lawnmower as shown in the picture and using your right hand to pull the chassis upwards. It's attached by two points on the back and two on the front.

Step 3: Unscrew all the screws around the chassis. 14 in total.

Step 4: Lift up the top of the chassis. Disconnect the long flat white connector that goes to the motherboard according to the yellow marking. Put the bottom part of the chassis to the side.

Step 5: Unscrew the three screws according to the markings. Turn the chassis over.

Step 6: Use a size 14 ring spanner to unscrew the knob.

Step 7: Now pull the rubber bellows off the holder. This is done by folding them out from the sides and threading it along.

Step 8: Thread the new rubber bellows onto the holder and attach the washer and knob. The washer sits in a groove. Make sure it's fitted correctly.

Step 9: Tighten the three marked screws.

Step 10: Get out the lower part of the chassis and connect the flat lead from the upper part to the motherboard. Change the sealing strip in the under-chassis at the same time.

Step 11: Screw back all the 14 screws around the chassis.

Step 12: Put the chassis on the robot by placing it on all four points simultaneously. Finally, connect the charging cable and press the rubber plug back into the lower part of the chassis.