April 2016 Service ManualEnginesPart No. 139234 Z-34/22 Bi-Energy 853 Tighten the set screw on the pulley bushinghand tight.4 Slide the engine pulley onto the pulleybushing.5 Install the pulley mounting bolts and tightenthem to specification. Refer to Specifications,Generator Specifications.Component damage hazard. Donot overtighten the pulleymounting bolts. There must be agap visible between the enginedrive pulley and the pulleybushing.1 gap2 shaft3 set screw4 engine drive pulley5 engine drive pulley bolt6 shaft bushing7 woodruff key6 Check the alignment between the engine drivepulley and the generator pulley using astraightedge. Refer to Specifications,Generator.Note: If the pulley alignment is not withinspecification, remove the engine pulley and repeatsteps 2 through 6. Refer to Repair Procedure, Howto Remove the Engine Drive Pulley.Coolant Temperature and OilPressure SwitchesThe engine coolant temperature switch is anormally open switch. The switch contacts close atapproximately 225°F / 107°C. If the coolanttemperature rises above the switch point, theswitch contacts close and the engine will shut off toprevent damage. The engine will not start until thetemperature drops below the switch point. An over-temperature indicator light at the ground controlsshould turn on when the switch closes.Component damage hazard.Donot crank the engine with theover-temperature light on.The engine oil switch is a normally closed switch.The switch contacts open at approximately 7 psi /0.48 bar. If the oil pressure drops below the switchpoint, the contacts open and the engine will shut offto prevent damage. A low oil pressure indicatorlight at the ground controls should turn on when theswitch opens.Component damage hazard.Donot crank the engine with the lowoil pressure light on.
