4 MAINTENANCEGB-264.19 TIRES ___________________________________________________________________1. Keep tires properly inflated to prolong tire life. Checkinflation pressure while the tires are cool. Inspecttread wear.2. Check pressure yearly. Use an accurate, lowpressure tire gauge.3. Keep tires inflated to proper pressureTractor: 20-22 psi (138 -152kPa).Decks: 20-25 psi (138 -173 kPa)4.20 WHEEL MOUNTING PROCEDURE ____________________________________________Tractor Wheels1. Remove dirt, grease and oil from stud thread. Do notlubricate threads.2. Position wheel on hub and inspect to insure fullcontact between mounting surface of wheel and hubor brake drum.3. Finger tighten all hardware then torque hardware incrisis-cross order; always tighten nuts in the topposition.4. Check and torque daily until torque is maintained,65-75 ft.lbs. (88-102 Nm)Caster WheelsTo extend bearing life check and adjust caster and gaugewheels every year. Lubricate bearings every 100 hoursusing NLGI Grade 2 grease.1. Raise deck so wheels are off ground and can berotated freely by hand.2. Check wheels for end play (I). Wheels should rotatefreely with zero end play.3. To eliminate end play, tighten inner nut (G) untilwheel just begins to bind then loosen it 1/4 turn.Lock inner nut in position using outer nut (H). Do notallow inner nut to rotate while tightening outer nut.4. Repeat step 2 and check for end play.Figure 4ICAUTIONUnless you have the proper training tools andexperience, DO Not attempt to mount a trie on a rim.Improper mounting can produce an explosion which mayresult in serious injury.!WARNINGMake sure the tractor is parked on a solid and levelsurface. Never work on a tractor that is supported onlyby the jack. Always use jack stands.If only the front or rear of the tractor is raised, placechocks in front of and behind the wheels that are notraised.!GHIHR021