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POLARIS SNOWMOBILE

HELP CENTER

8/26/2020
VIDEO: 850 Switchback Assault 146 Drive Belt Inspection and Replacement


Always wear safety glasses and nitrile gloves when servicing your Polaris snowmobile. To inspect or replace the drive belt on your Switchback Assault 146 with an 850 engine, follow these steps. Do not attempt this process after operating in reverse. The snowmobile must be stopped after forward motion to prevent damage to components during belt removal.

1. Ensure the sled is on a flat, level surface.

2. Remove the left side panel by turning the three quarter-turn latches. Pivot the panel away from the sled and pull out to remove.

3. If needed, rotate the driven clutch counterclockwise one quarter of a turn to disengage reverse.

4. Set the parking brake.

5. Take note of the drive belt direction of rotation. The belt must be installed in the same direction if reusing.

6. Remove the clutch spreader tool from the panel trim. Spread the panel trim apart as needed to access the driven clutch.

7. Insert the clutch spreader tool into the threaded hole on the driven clutch and turn clockwise to spread the clutch. If the tool does not turn readily, rotate the driven clutch an additional one quarter of a turn counterclockwise and try again.

8. Carefully walk the belt off the driven clutch and remove it from the drive clutch.

9. Inspect the belt for any fraying, hour-glassing, loose cords, missing cogs, abrasions, burns or damage. Replace if needed.

10. Before continuing, clean the area around the clutches thoroughly to prevent damage to vehicle components.

11. If replacing the belt, clean with a mixture of warm soapy water and ensure the part number on the belt is facing outward when installed. The belt is part number 3211215.

12. Begin installing the belt over the drive clutch and then continue walking it over the driven clutch sheave.

13. Once installed, spin the belt clockwise while removing the clutch spreader tool to help seat the belt.

14. Then completely remove the clutch spreader tool. 

15. Reconnect the side panel trim and reinstall the spreader tool. 

16. Reinstall the side panel by inserting the upper tab and pivoting in to engage the lower tab. 

17. Finally, latch the three quarter-turn latches to secure the panel.

For more information, see your authorized Polaris Dealer. To find a dealer near you, use the Dealer Locator.
Maintenance tips, procedures and specifications can be found in your Owner's Manual.
To find diagrams and replacement part numbers, use the online parts catalog.