Homelite UT905700 User Manual - Page 19

MAINTENANCE WARNING: When servicing, use only identical replacement parts. Use of any other parts can create a hazard or cause product damage. Only the parts shown on the parts list are intended to be repaired or replaced by the customer. All other parts should be replaced at an authorized service center. GENERAL MAINTENANCE Keep the generator in a clean and dry environment where it is not exposed to dust, dirt, moisture, or corrosive vapors. Do not allow the cooling air slots in the generator to become clogged with foreign material such as leaves, etc. Do not use a garden hose to clean the generator. Water entering the fuel system or other internal parts of the unit can cause problems that will decrease the life of the generator. To clean the unit:  Use a soft bristle brush and/or vacuum cleaner to loosen and remove dirt and debris.  Clean air vents with low pressure air that does not exceed 25 psi.  Wipe the exterior surfaces of the generator with a damp cloth. INFLATING THE TIRES WARNING: To reduce the risk of injury, do not over-inflate the tires of this unit. During inflation regularly check the pressure using a reliable tire pressure gauge, and never exceed 25 psi. Always ensure the bolts in the wheel hubs are securely tight before adding pressure to the tire. NOTE: THE TIRES SHOULD BE INFLATED USING A HAND PUMP ONLY. DO NOT USE AN AIR COMPRESSOR. CHECKING/CLEANING AIR FILTER See Figure 13. For proper performance and long life, keep air filter clean.  Loosen the screws on the top and bottom of the air filter cover. Remove cover and set aside.  Remove the filter element.  If the filter element is dirty, clean with warm, soapy wa- ter. Rinse and let dry.  Apply a light coat of engine lubricant to the element, then squeeze it out.  Replace the element in the air filter unit.  Replace the air filter cover and tighten screws to secure. NOTE: Do not run the generator without the air filter. Rapid engine wear will result. CHANGING ENGINE LUBRICANT See Figure 14.  Remove the oil cap/dipstick.  Place a container underneath the oil drain plug to collect used lubricant as it drains.  Unscrew the oil drain plug and remove.  Allow lubricant to drain completely.  Reinstall the oil drain plug and tighten securely.  Refill with lubricant following the instructions in the ­Checking/Adding Lubricant section.  Reinstall the oil cap/dipstick. NOTE: Used lubricant should be disposed of at an approved disposal site. See your local oil retailer for more information. SPARK PLUG MAINTENANCE See Figure 15. The spark plug must be properly gapped and free of deposits in order to ensure proper engine operation. To check:  Remove the spark plug cap.  Clean any dirt from around base of spark plug.  Remove spark plug using wrench (not included).  Inspect spark plug for damage, and clean with a wire brush before reinstalling. If insulator is cracked or chipped, spark plug should be replaced. NOTE: If replacing, use the following recommended spark plug or equivalent: NGK BPR4ES.  Measure plug gap. The correct gap is 0.028−0.031 in. (0.7-0.8 mm). To widen gap, if necessary, carefully bend the ground (top) electrode. To lessen gap, gently tap ground electrode on a hard surface.  Seat spark plug in position; thread in by hand to prevent cross-threading.  Tighten with wrench to compress washer. If spark plug is new, use 1/2 turn to compress washer appropriate amount. If reusing old spark plug, use 1/8 to 1/4 turn for proper washer compression. NOTE: An improperly tightened spark plug will become very hot and could damage the engine. Page 15 - English