In this video, we show you how to change an air filter on a Stihl TS420 disc cutter.

Health & Safety Warning - Please ensure that you have safely prepared the machine and workspace. If you are unsure about any aspect of the task please seek professional advice.

Transcript

Today we're going to change the Air Filter on the Stihl TS420 Cut Off Saw. First of all we need to remove the air filter cover. Remove the four screws using the torx spanner. Once that's done, remove the main air filter by pulling it away from the housing. Now that's removed, you can free the gauze filter seated behind it. Whilst the air filter is removed you can check the tank breather to see if it's damaged, making sure the air ducts are clear from blockages.Then simply replace the gauze air filter, the genuine gauze has a tab to indicate the correct way to fit it. Before replacing the main filter make sure the seal is intact and not damaged. Now place the new main air filter in, with the mould surrounding the ducts and the filter positioned over the gauze filter. Check the casing for cracks and signs of wear, that would prevent a good seal being made. Place the casing back over the filter ensuring it is seated correctly before screwing. Make sure the cover is secure without overtightening, you don't want to split the plastic. That's how you change an air filter on a Stihl TS420. All the parts & tools needed for this task are listed in the description below.

Parts

Parts and tools included in the TS420 disc cutter how-to video.

• Screw IS-D5x20 - 0000 951 1100
• Genuine Air Filter Set - 4238 140 4403
• Non Genuine Air Filter Set 410 100
• Non Genuine Air Filter Set (Budget) - 410 600
• Air Filter Cover - 4238 140 1000
• Genuine Torx Wrench/Plug Spanner - 4224 890 3400
• Non Genuine Torx Wrench/Plug Spanner - 410 250