Section 3 • Scheduled Maintenance Procedures November 20143 - 36 GS-2669 RT • GS-3369 RT • GS-4069 RT Part No. 229753CHECKLIST D PROCEDURESD-4Perform Engine Maintenance -Perkins ModelsEngine specifications require that this procedure beperformed every 1000 hours.• Replace fan belt• Adjust valve lashRequired maintenance procedures and additionalengine information is available in thePerkins 403D-11 Operator's Manual(Perkins part number SEBU8311-01.Perkins 403D-11 Operator's ManualGenie part number 131661D-5Perform Engine Maintenance -Kubota Gas/LPG ModelsEngine specifications require that this procedure beperformed every 1000 hours.• Replace spark plugs• Inspect LPG coolant hoses• Inspect LPG vacuum hose• Flush coolant system• Adjust valves• Inspect valve seats• Clean cylinder headsRequired maintenance procedures and additionalengine information is available in theKubota WG972 Operator's Manual(Kubota part number EG801-8916-2).Kubota WG972 Operator's ManualGenie part number 234803
