REV DSection 4 • Repair ProceduresJuly 2007Part No. 72863 GS-3390 • GS-4390 • GS-5390 4 - 57ENGINES4-4Oil Temperature andOil Pressure Switches -Deutz ModelsThe engine oil temperature switch is a normallyopen switch. The switch contacts close atapproximately 300o F / 149 o C. If the oiltemperature 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.The engine oil pressure switch is a normally closedswitch. The switch contacts open at approximately7 psi / 0.48 bar. If the oil pressure drops below theswitch point, the switch opens and the engine willshut off to prevent damage.How toInstall the Oil Temperature andOil Pressure SwitchesNote: Perform this procedure with the engine off.1 Release the latches on the engine tray and fullyslide the engine tray out.2 Insert a 6 inch / 15 cm screwdriver or rod intothe engine tray lock hole located near theengine tray roller wheels to prevent the enginetray from moving.3 Oil temperature switch: Remove thefasteners from the engine side cover andremove the cover.Oil pressure switch: Locate the oil pressureswitch near the oil filter.4 Tag and disconnect the wiring from the switch.Remove the switch from the engine.Burn hazard. Contact with hotengine fluids or components maycause severe burns.5 Install and tighten the new switch. Torque tospecification.Note: Always use pipe thread sealant wheninstalling a switch.6 Connect the wires to the new switch.7 Oil temperature switch: Install the engine sidecover.Oil temperature switch specificationsTorque 8-10 ft-lbs11-14 NmHex size 11 / 16 inchesTemperature switch point 300°F149°COil pressure switch specificationsTorque 8-10 ft-lbs11-14 NmHex size 11 / 16 inchesOil pressure switch point 7 psi0.48 bar
