Index Snowmobiles / ATV Snowmobile Polaris DEEP SNOW (TRAIL RMK, 600 RMK, 700 RMK, 800 RMK, 900 RMK, 600 SWITCHBACK, 800 SWITCHBACK) - service manual 2005 year
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CLUTCHING 6.20 BELT INSPECTION 1. Measure belt width and replace if worn severely. Generally, belt should be replaced if clutches can no longer be adjusted to provide proper belt deflection. S The top edges have been trimmed on some drive belts. It will be necessary to project the side profiles and measure from corner to corner. S Place a straight edge on each side of the drive belt. S Place another straight edge on top of belt. S Measure the distance where the side straight edges intersect the top, as shown in the illustration at right. 2. Inspect belt for loose cords, missing cogs, cracks, abrasions, thin spots, or excessive wear. Replace if necessary. 3. Inspect belt for hour glassing (extreme circular wear in at least one spot and on both sides of the belt). Hour glassing occurs when the drive train does not move and the drive clutch engages the belt. BELT DIAGNOSIS Belt Wear / Burn Diagnosis Possible Cause Of Wear Or Burning Solution Driving at or about engagement RPM for extended periods in all types of conditions Drive at higher RPM if possible. Gear the machine down. Make sure belt deflection is at 1.25″ to achieve optimum starting ratio Cold weather startups Be patient. Warm up engine at least 5 minutes or until it readily responds to throttle input. For the quickest most efficient driveaway in extreme cold weather, take drive belt off machine and bring it in to a warm environment. Break skis and track loose from the snow. Engage throttle aggressively for short durations for initial cold driveaway Towing another machine at or about engagement RPM When possible, do not go in deep snow when towing another machine. Use fast, effective throttle to engage the clutch. Not all machines are intended for pulling heavy loads or other machines. Spinning track while vehicle is stuck (high RPM, low vehicle speed, high ambient temp. Example: 8000 RPM, 10mph vehicle speed, 60 mph indicated on speedometer. Lower the gear ratio. Remove windage plates from driven clutch. If possible, move to better snow conditions and reduce RPM. Avoid riding in very high ambient temperatures. Ice and snow piled up between track and tunnel overnight or after stopping for a long period of time (enough to re-freeze the snow). Break loose snow and ice under tunnel. Allow longer than normal warm--up. Allow belt to warm sufficiently and increase grip ability on clutch sheaves. Use fast, effective throttle when engaging clutch. Poor running engine Maintain good state of tune including throttle and choke synchronization. Check for fouled spark plug(s). Check for foreign material in carbs. Make sure no water or ice in fuel tank, lines, or carburetors. Loading machine on trailer Use caution when loading machine. Carbide skags may gouge into trailer and prevent drive train from spinning freely. Use enough speed to drive completely onto trailer. If machine cannot be driven completely onto trailer, it may need to be pulled or pushed to avoid belt wear / burning. Clutch malfunction Check for correct clutch components. Slow, easy belt engagement -- easing on the throttle Use fast, effective throttle to engage the clutch. Projected Belt Width |