Maintenance Instructions REPLACING/REPAIRING643. Press blower wheel out of the housing using awheel puller hooked to lugs on the bearing hous-ing. The bearings have been secured in thehousing with a retaining compound - Loctite ®RC/680, and considerable force will be re-quired to break this bond. After the bearingshave “broken loose” from the housing, only lightpressure should be required to remove thewheel assembly out of the housing.NOTE: It may or may not be possible to removethe front bearing from the blower wheel withoutdamaging it. If the bearing is damaged, it willneed to be replaced along with the wheel.Pressing Blower Wheel Out of HousingBlower Wheel Installation1. To install the blower wheel, reverse the removalprocedures. The front bearing is mounted onthe blower wheel shaft, secured by a lockingcollar. Drive the locking collar clockwise with apunch, and tighten the set screw.2. Press blower wheel and front bearing into theblower housing. Use Loctite ® RC/680 retainingcompound on the outer bearing race and insidethe bearing housing.3. Press the rear bearing into place, using Loctite®on both the outer bearing race and the housing.4. Install the locking collar on the rear bearing andinstall the blower pulley to complete the blowerassembly. Torque the blower pulley set screwsto 250 in-lb (28.3 N⋅m).GHS Blower Assembly InstallationReinstall the blower assembly into the mower usingthe reverse procedures of GHS Blower AssemblyRemoval.ADJUSTMENTSSafety SwitchesThere are four (4) safety interlock switches (and onecontrol switch if GHS equipped) on the tractor. Usethe panel nuts on the switch body to position eachswitch for proper activation of the switch. The ad-justment procedure for each switch is:Seat SwitchAdjust switch position in body panel to achieve a1/32 to 1/16 in. (.79 mm to 1.59 mm) air gap betweenthe switch plunger and seat frame with no weight onthe seat. Test for proper operation.Wheel PullerHooked to Lugs onBearing HousingDANGERIf the engine must be running to performa maintenance adjustment, keep hands,feet, and clothing from moving parts. DONOT wear jewelry or loose clothing.