7 - 32 Genie Z-45/22 Part No. 32960Service Manual - Second EditionSection 7 - Repair ProceduresFORD LSG 423 ENGINE7-7Water Temperature and OilPressure SwitchesThe water temperature switch is a normally openswitch that closes at approximately 230° F(112° C). When this switch closes, the engine isshut off to prevent damage and will not restart untilthe temperature drops below the switch point. Anover-temperature indicator light at the ground andplatform controls should turn on when the switchcloses.Component damage hazard. Donot crank the engine with theover-temperature on.The oil pressure switch is a normally closed switchthat opens at approximately 3 to 5 psi(0.21 to 0.34 bar). If the oil pressure drops belowthe switch point, the switch closes and shuts offthe engine. A low oil pressure indicator light at theground controls should turn on when the switchcloses.Component damage hazard. Donot start or continue to run theengine with the low oil pressurelight on.How to Remove the WaterTemperature and Oil PressureSwitchesPerform this procedure with the engine off.1 Remove the 3 bolts from the engine pivot plate.Swing the engine pivot plate away from themachine to access both switches.2 Disconnect the wiring from the desired switch.3 Remove the switch from the engine block, andthen install the new switch. Do not over tighten.Burn hazard. Contact with hotengine fluids or components maycause severe burnsAlways use pipe thread sealantwhen installing a switch.Water temperature switch specificationsTorque 8-18 ft-lbs11-24 NmHex size 13/16 inchTemperature switch point 230° F (112°C)Oil pressure switchTorque 8-18 ft-lbs11-24 NmHex size 1-1/16 inchOil pressure switch point 3-5 psi0.21-0.34 bara oil pressure switchb water temperature switchba800-610-4101ActionRental.com
