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2023+ Patriot Boost INDY VR1 Chaincase Fluid Replacement

Required Tools and Supplies

  • 6mm Allen Socket
  • 10mm Socket
  • T40 TORX® Socket
  • Ratchet
  • Torque Wrench 
  • Fluid Filler
  • SCL Synthetic Chaincase Lubricant
  • Multi-Function Pliers
  • Fluid Suction Device (Suction Method)
  • T40 TORX® Socket (Front Cover Method)
  • 10mm Socket (Front Cover Method)
  • Drain Pan (Front Cover Method)
  • Prying Tool (Front Cover Method) 
  • Shop Rags
  • Safety Glasses
  • Nitrile Gloves

For more information on tools, visit the Tools and Fasteners Guide. Always wear safety glasses and nitrile gloves when servicing your Polaris snowmobile.

This video will outline the pump and front cover methods that can be used to change the chaincase fluid on a Patriot Boost INDY VR1 snowmobile. For optimal performance, always use Polaris recommended fluids as described in your Owner’s Manual.

1. Ensure the snowmobile is on a flat, level surface and set the parking brake.

2. Clean the area around the fill plug. Placing a rag under the fill plug will help catch any escaping fluid.

3. Remove the fill plug with a 6mm Allen socket and set aside.

4. To extract the fluid using the pump method:

  • Safely elevate the front of the snowmobile using a floor jack or appropriate lift.
  • Insert the tube of the suction device into the fill hole. Direct the hose toward the bottom front area of the cover, away from the chain and sprocket.
  • Extract the oil using the suction device.
  • Safely lower the snowmobile to fill the chaincase.

5. To drain the fluid using the front cover method:

  • Remove the right side-panel by turning the three quarter-turn latches. Pivot the panel away from the sled and pull out to remove.
  • Remove the fastener on the lower right side of the console with a T40 TORX® socket.
  • Remove the push-pin rivet securing the lower right portion of the console with multifunction pliers.
  • Remove the push-pin rivet underneath securing the right fender to the footrest.
  • If equipped with a battery, remove the battery. Ensure the negative cable is removed first to prevent arcing.
  • Disconnect the harness from the battery bracket and remove the bracket.
  • Remove the two fasteners securing the lower fender to the chaincase with a T40 TORX® socket.
  • Place a drain pan underneath the chaincase. Tip: Placing a rag in the bottom of the drain pan will help prevent the splashing of fluid.
  • Loosen the two lower chaincase cover fasteners with a 10 mm socket, but do not remove them.
  • Carefully pry on the cover tab and allow the fluid to drain completely. Do NOT insert a screwdriver or pry bar between the cover and chaincase.
  • Once complete, reinstall the 2 cover fasteners, and torque to 12 ft-lbs (16 Nm).

6. Clean any dirt or debris from the fill plug.

7. Inspect the O-ring on the plug and replace if necessary. 

8. Fill the chaincase through the fill plug hole until fluid reaches the bottom threads and begins to spill out. Chaincase fluid is part number 2873105 for 1qt.

9. Reinstall the fill plug, and torque to 48 in-lbs (6 Nm).

10. Before continuing, clean any residual fluid off the vehicle. Dispose of the used fluid at your local recycling center.

11. Reinstall the fasteners securing the lower fender, and torque to 36 in-lbs (4 Nm).

12. If needed, reinstall the battery bracket and ensure the harness retainer is reattached on the bottom.

13. Reinstall the battery, ensuring the positive cable is connected first to prevent arcing. 

14. Reinstall the push-pin rivet underneath the console.

15. Install the push-pin rivet on the lower right portion of the console.

16. Reinstall the lower console fastener, and torque to 71 in-lbs (8 Nm).

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

18. 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.

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