Cub Cadet ZT1 50 Operation Manual - Page 16
Operation
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OPERATION Operation STARTING THE ENGINE BEFORE OPERATING YOUR TRACTOR • Before operation, refer to Maintenance Schedule chart located in this manual for regularly scheduled service items. • This engine is certified to operate only on clean, fresh, unleaded gasoline. Fill only with clean, fresh, unleaded gasoline with a pump sticker octane rating of 87 or higher. • Do not use gasoline left over from the previous season, to minimize gum deposits in the fuel system. • Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by volume) is an approved fuel. Other gasoline/alcohol blends are not approved. • Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline blends (up to a maximum of 15% MTBE by volume) are approved fuels. Other gasoline/ether blends are not approved. CAUTION The operator should be sitting in the tractor seat when starting the engine. 1. Operator should be sitting in the tractor seat with the lapbar drive control levers fully out and in the park position. See Figure 19. Refer to Practice Operation for further instructions. Control Levers Moved Outward & in the park Brake Position SAFETY INTERLOCK SYSTEM WARNING Do NOT operate the tractor if the safety interlock system is malfunctioning. This system was designed for your safety and protection. This tractor is equipped with a safety interlock system for the protection of the operator. If the interlock system should ever malfunction, do not operate the tractor. Contact an authorized service dealer. • The safety interlock system prevents the engine from cranking or starting unless the parking brake is engaged and the PTO switch is in the DISENGAGED (OFF) position. • The engine will automatically shut OFF if the operator leaves the seat before engaging the parking brake. Figure 19 2. Make certain the PTO is in the "OFF" position. Move the choke control or throttle/choke control into the full choke position. Move the throttle control to midway between its slow and fast positions on models with a separate choke control. NOTE: If the engine is warmed up, it may not be necessary to choke the engine. 3. Turn the key clockwise to the START position. After the engine starts, release the key. It will return to the RUN position. • The engine will automatically shut OFF if the operator leaves the tractor's seat with the PTO switch in the ENGAGED (ON) position, regardless of whether the parking brake is engaged. CHECKING THE SAFETY INTERLOCK CIRCUITS Periodically check the safety interlock circuits to ensure they are working properly. If a safety circuit is not working as designed, contact an authorized service dealer to have the tractor inspected. Do NOT operate the tractor if any safety circuit is not functioning properly. To check the safety circuits, proceed as follows: 1. Pull the PTO upward to the ENGAGED (ON) position. Momentarily turn the ignition switch to the START position; the engine should not crank. 2. With the tractor running move both lapbar drive control levers fully inward in the neutral position; then lift upward from the operator's seat. The engine should stop. CAUTION Do not hold the key in the START position for longer than ten seconds at a time. Doing so may cause damage to your engine's electric starter. 4. As the engine warms up, gradually pull the throttle/choke control lever rearward past the choke detent position or slowly disengage the choke on models with a separate choke. Do not use the choke position to enrich the fuel mixture, except as necessary to start the engine. 5. Allow the engine to run for a few minutes at mid-throttle before putting the engine under load. 6. Observe the hour meter/indicator panel. If the battery indicator light or oil pressure light come on, immediately stop the engine. Have the tractor inspected by your authorized service dealer. 3. With both lapbar drive control levers fully outward in the parking brake engaged position, engage the PTO. Lift upward from the operator's seat; the engine should stop. 16