Operator's Manual Fifth Edition • Third Printing18 S-80 • S-85 Part No. 1000231Function TestsDo Not Operate Unless:You learn and practice the principles of safemachine operation contained in this operator'smanual.1 Avoid hazardous situations.2 Always perform a pre-operationinspection.3 Always perform function tests prior touse.Know and understand the function testsbefore going on to the next section.4 Inspect the workplace.5 Only use the machine as it was intended.FundamentalsThe function tests are designed to discover anymalfunctions before the machine is put into service.The operator must follow the step-by-stepinstructions to test all machine functions.A malfunctioning machine must never be used. Ifmalfunctions are discovered, the machine must betagged and removed from service. Repairs to themachine may only be made by a qualified servicetechnician, according to the manufacturer'sspecifications.After repairs are completed, the operator mustperform a pre-operation inspection and functiontests again before putting the machine into service.1 Select a test area that is firm, level and free ofobstruction.At the Ground Controls2 Turn the key switch to ground control.3 Pull out the red Emergency Stop button tothe on position.Result: The beacon (if equipped) should flash.4 Start the engine. See Operating Instructionssection.Test Emergency Stop5 Push in the red Emergency Stop button to theoff position.Result: The engine should turn off and allfunctions should not operate.6 Pull out both red Emergency Stop buttons tothe on position and restart the engine.Test the Extendable AxlesNote: Start this test with the axles retracted.7 Hold the function enable switch toeither side and activate the boomup function.Result: The boom should raise to 8° abovehorizontal and then stop. The boom should notraise above the limit switch unless both axlesare extended.8 Hold the function enable switch to either sideand activate the boom down function.Result: The boom should lower and return to thestowed position.