GENERAL OPERATION
Daily Inspection
Starting the Engine
CAUTION Use of ether or starting fluids may cause engine damage and/or personal injury. Do not use ether or starting fluids to aid in starting the engine. The 4520 is equipped with an interlock system for op- erator safety. The safety interlock system requires the parking brake to be engaged and the SDLA lever to be in the neutral position for the power unit to start. 1. Turn the fuel shut-off valve to the On position. 2. Turn the battery disconnect switch to the On posi- tion. 3. Pull out the choke handle to the choke or start position. Choke may not be required when the engine is at operating temperature. 4. Move the throttle lever to the slow idle position. ATTENTION Do not run the electric starter continuously for more than 10 seconds. If the engine does not start in this time, wait 30 seconds and try again. 5. Turn the ignition key to the start position and hold to engage the starter. Release the key when the engine starts. NOTE: if engine fails to start, refer to the troubleshooting section. 6. As the engine warms up, gradually push the choke handle in to the run position. Wait until the engine runs smoothly before each adjustment. ATTENTION Allow time for the hydraulic oil to circulate before operating the power unit. Failure to allow adequate warm up time may result in severe damage to the hydraulic system. Warm up time is increased in colder weather. 7. A The engine and hydraulic oil must be warmed up
WARNING Always engage the parking brake, shut off the pow - er unit engine, remove the ignition key, and ensure that all moving parts have come to a complete stop before inspecting the components, or attempting any repair or adjustment. 1. Park the machine on a level surface, with the en- gine shut off and all fluids cold. 2. Perform a visual inspection of the power unit. Look for loose or missing hardware, damaged components, or signs of wear. 3. Inspect the ROPS structure and seat belt for dam- age or signs of wear. 4. Inspect the battery, the electrical connections, and the lights. 5. Ensure the parking brake is set to the proper ten- sion. Adjust the tension as required. 6. Inspect the hydraulic hoses and the hydraulic fit - tings to ensure tight, leak free connections. 7. Inspect the fuel lines to ensure tight, leak free connections. 8. Inspect the belts for damage or excessive wear. Refer to the Belt Inspection section of this manual. 9. Inspect the power unit’s engine oil level, the hydraulic oil level, the coolant level, and the fuel level. Add fluid or service as required. ATTENTION If the power unit is equipped with a cab and heater kit and the outside air temperature is 4° C (40° F) or above, the radiator baffle must be removed and replaced with the radiator screen. 10. Ensure the radiator screen, the air cleaner, and the engine compartment are clean. 11. Check the tires for proper inflation. 12. Test the operator safety interlock system.
before operating. Allow the power unit to run at approxi- mately 1,800 rpm until the hydraulic filter is warm to the touch. The filter (A) is located to the inside of the left front fender.
Operation - 33
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