North Star M157593E Owner's Manual

Maintenance & Repair48Drive beltmaintenanceCheck drive belt tension after first 24 hours of running and thenroutinely with each oil change. Tighten or replace belts as needed. Alwaystighten belts if slipping.WARNING:Belt slippage can cause static electricity build-up, which may result insparking. Fire ignition can result.Instructions:1) Make sure engine is off and spark plug wire is removed.2) Remove belt guard. See "Parts Breakdown" section of this manual forlocation.3) Loosen pump mounting bolts (4).4) Inspect belts for wear/damage. Replace as needed. When replacingbelts, always replace all three – don't mix old and new belts.5) Tighten tension bolt to achieve the recommended belt tension specifiedbelow. (Tightening the tension bolt pulls the pump away from theengine, tightening all three belts simultaneously.)Tension Specifications New belt Used BeltStatic tension (per rib/strand): 87.0-93.2 lb. 74.5-80.8 lb.Rib/strand Deflections Distance: 0.2 in 0.2inRib/Strand Deflection Force: 5.9-6.3 lb. 5.2-5.5 lb.Sonic Tension Meter: 387 to 414 N 332 to 359NNote: Some general rules of belt tension are: The ideal tension is the lowest tension without belt slippage Over tightening decreases belt and bearing life. Keep belts clean and free of foreign material that may cause slippage Do not apply belt dressing, which can cause damage and early beltfailure.6) Ensure all three belts are the same tension.7) Re-tighten pump mounting bolts. Torque to 29.4 ft-lbs.8) Replace belt guard.WARNING:Do not operate unless belt guard is in place to prevent access to rotatingparts. Clothing or hair can become rapidly entangled in unguardedrotating parts, resulting in serious injury or death.