Part No. 77828 S-60 • S-65 3 - 23July 2005 Section 3 • Scheduled Maintenance ProceduresREV CB-11Test the Platform Self-levelingAutomatic platform self-leveling throughoutthe full cycle of boom raising and lowering isessential for safe machine operation. Theplatform is maintained at level by the platformleveling slave cylinder which operates in a closedloop hydraulic circuit with the master cylinderlocated at the base of the boom. A platform self-leveling failure creates an unsafe working conditionfor platform and ground personnel.1 Start the engine from the ground controls andlower the boom into the stowed position.2 Hold the function enable/rpm select toggleswitch to either side and adjust the platform to alevel position using the platform level toggleswitch.3 Raise and lower the primary boom througha full cycle.Result: The platform should remain level atall times to within ±5 degrees.B-12Test the Engine Idle SelectA properly operating engine idle select switchis essential to good engine performance and safemachine operation. There are two settings.Foot switch activated low idle (turtle symbol)allows the operator to control individual boomfunctions.Foot switch activated high idle (rabbit symbol)should be used for normal machine operation. Thisselection activates high idle only when the footswitch is pressed down.1 Pull out the red Emergency Stop button to theon position at both the ground and platformcontrols.2 Start the engine from the ground controls thenmove and hold the function enable/rpm selecttoggle switch to the high idle (rabbit symbol).Result: The engine should change to high idle.3 Release the function enable/rpm select toggleswitch.Result: The engine should return to low idle.4 Turn the key switch to platform controls.5 Move the engine idle control switch to footswitch activated high idle (rabbit and foot switchsymbol).Result: The engine should not change tohigh idle.6 Press down the foot switch.Result: The engine should change to high idle.6 Move the engine idle control switch to footswitch activated low idle (turtle symbol).Result: The engine should change to low idle.CHECKLIST B PROCEDURES
