Content Source: 2020 PRO-RMK / RMK ASSAULT / SKS 155 Owner’s Manual (9929772 R02) > Maintenance Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Lubrication

Rear Suspension Lubrication

Lubricate the suspension pivot shafts with POLARIS All Season Grease at the intervals outlined on Periodic Maintenance Interval Table and before seasonal storage. When operating in heavy, wet snow conditions, lubricate every 500 miles (800 km).
Lack of lubrication will adversely affect your ride and the life of the suspension. For more information about suspension lubrication and adjustments, your POLARIS dealer can assist.
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Chaincase Oil (if equipped)

Check and change the chaincase oil at the intervals outlined in the maintenance charts beginning pages. Maintain the oil level at the top of the fill plug hole. POLARIS recommends the use of POLARIS Synthetic Chaincase Lube, or equivalent product.

Oil Level Check

  1. Position the snowmobile on a level surface.
  2. Remove the fill plug.
  3. Using a funnel, slowly add the recommended oil until the fluid begins to overflow.
  4. Clean the area with a clean, dry shop towel. Reinstall the fill plug.
TORQUE
4-4.9 ft-lbs (5.4-6.6 Nm)

Oil Change (Pump Method)

NOTE
This procedure requires the use of a commercially available hand pump oil extractor.
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  1. Elevate the front of the snowmobile using a floor jack or appropriate lift.
  2. Remove the fill plug. Clean all metal shavings off the plug.
  3. Insert the tube of a hand pump oil extractor into the fill hole. Direct the hose toward the bottom front area of the cover, away from the chain/sprocket.
  4. Extract the oil from the chaincase.
  5. Lower the snowmobile.
  6. Using a funnel, slowly add the recommended oil until the fluid begins to overflow. Maximum fluid capacity is 10.5 oz. (310 ml).
  7. Clean the area with a clean, dry shop towel.
  8. Reinstall the fill plug.
TORQUE
4-4.9 ft-lbs (5.4-6.6 Nm)

Oil Change (Cover Drain Method)

  1. Position the snowmobile on a level surface.
  2. Remove the two (2)screws securing the fender to the chaincase .Image
  3. Remove the right side panel. If equipped with a battery, remove the battery.
  4. Place a drain pan under the chaincase.
  5. Loosen (do not remove) the three (3) chaincase cover screws .

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  6. Carefully pry the cover open.
    NOTICE

    DO NOT insert a screwdriver or pry bar between the cover and chaincase. Seal damage may occur.
  7. Allow the oil to drain completely.
  8. Tighten the cover screws .
    TORQUE

    6-10 ft-lbs (8-13 Nm)
  9. Remove the fill plug . Clean all metal shavings off the plug.Image
  10. Using a funnel, slowly add the recommended oil until the fluid begins to overflow. Maximum fluid capacity is 10.5 oz. (310 ml).
  11. Clean the area with a clean, dry shop towel.
  12. Reinstall the fill plug .
    TORQUE

    4-4.9 ft-lbs (5.4-6.6 Nm)

  13. Reinstall the battery(if equipped).
  14. Reinstall the screws securing the fender to the chaincase.

Oil Lines

Inspect oil line condition every 1000 miles (1600 km).

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