REV BSection 3 • Scheduled Maintenance ProceduresJune 2007Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056 3 - 21B-7Inspect the Fuel and HydraulicTank Cap Venting SystemsNote: Genie requires that this procedure beperformed every 250 hours or quarterly, whichevercomes first. Perform this procedure more often ifdusty conditions exist.Free-breathing fuel and hydraulic tank caps areessential for good machine performance andservice life. A dirty or clogged tank cap may causethe machine to perform poorly and continued usemay cause component damage. Extremely dirtyconditions may require that the caps be inspectedmore often.Explosion and fire hazard. Enginefuels are combustible. Perform thisprocedure in an open, well-ventilated area away from heaters,sparks, flames and lightedtobacco. Always have anapproved fire extinguisher withineasy reach.Note: Perform this procedure with the engine off.1 Remove the cap from the fuel tank.2 Check for proper venting.Result: Air passes through the fuel tank cap.Proceed to step 4.Result: If air does not pass through the cap,clean or replace the cap. Proceed to step 3.Note: When checking for positive tank cap venting,air should pass freely through the cap.3 Using a mild solvent, carefully wash the capventing system. Dry using low pressurecompressed air. Repeat this procedurebeginning with step 2.4 Install the fuel tank cap onto the fuel tank.5 Remove the breather cap from the hydraulictank.6 Check for proper venting.Result: Air passes through the fuel tank cap.Proceed to step 8.Result: If air does not pass through the cap,clean or replace the cap. Proceed to step 7.Note: When checking for positive tank cap venting,air should pass freely through the cap.7 Using a mild solvent, carefully wash the capventing system. Dry using low pressurecompressed air. Repeat this procedurebeginning with step 6.8 Install the breather cap onto the hydraulic tank.CHECKLIST B PROCEDURES
