1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 177Get this manual
FINAL DRIVE SYSTEM SERVICE 19871988 4x4 Center And Forward Chain Adjustment Chain tension should be checked whenever machine enters your shop for routine maintenance checksAt the same time be sure to check sprockets, chains, and chain O-ringsLubricate with Polaris O-ring chain lubricant (PN 2871079)Center Chain NOTE: Always adjust the center chain first as its adjustment will affect the forward chainOverhaul Procedure 1234Remove the forward and center chain guardsLoosen the bolt (A) that holds the housingLoosen the two jam nuts on the adjuster rod (B)Lengthen or shorten this rod until chain deflection is 18" (.3 cm) with 10 Ibs(4.5 kg) of force at the center of the chainTighten the jam nuts (B) and the housing bolt (A)