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Cummins/Onan — －28－

A Cummins/Onan service procedure — check it applies to your exact model before use.

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Procedure

  1. 9. "HOW-TO" MAINTENANCE ENGINE OIL CHANGE ■Change engine oil every 100 hours. (For new engine, change oil after 20 hours.) (a) Drain oil by removing the drain plug and the oil filler cap while the engine is warm. (b) Reinstall the drain plug and fill the engine with oil until it reaches the upper level on the oil filler cap. OIL DRAIN PLUG ■Use fresh and high quality lubricating oil to the specified level as directed on page 8. If contaminated or deteriorated oil is used or the quantity of the engine oil is not sufficient, the engine damage will result and its life will be greatly shortened. CLEANING AIR CLEANER (Model RGV2800) Maintaining an air cleaner in proper condition is very important. Dirt induced through improperly installed, improperly serviced or inadequate ele- ments damages and wears out engines. Always keep the air cleaner element clean. (a) Unhook the cover and remove the cleaner element. (b) Inner element : Wash the element with kerosene, then soak it in mixed oil (Kerosene (3 parts) : Engine oil (1 part)). Drain the mixed oil. (c) Outer element : Wash the element with kerosene, then dip it into the mixed oil (Kerosene (3 parts) : Engine oil (1 part)). Squeeze out the mixed oil. (Do not twist.) HOOK COVER INNER ELEMENT OUTER ELEMENT －29－ ENGLISH COVER INNER ELEMENT OUTER ELEMENT
  2. 1. Urethane Foam Element Wash and clean the urethane foam with detergent. After cleaning, dry it. Clean the urethane foam element every 50 hours.
  3. 2. Paper element Clean by tapping gently to remove dirt and blow off dust. Never use oil. Clean the paper element every 50 hours of operation, and replace element set every 200 hours. Clean and replace air cleaner elements more often when operating in dusty environments. Do not wash elements with kerosene, gasoline or oil. ［CAUTION］ A dirty air cleaner element will cause starting difficulty, power loss, engine malfunctions, and shorten engine life extremely. Always keep the air cleaner element clean. (Model RGV4100, 6100) CLEANING AND ADJUSTING SPARK PLUG (a) If the plug is contaminated with carbon, remove it using a plug cleaner or wire brush. (b) Adjust the electrode gap. ELECTRODE GAP Electrode gap Model Spark plug RGV2800 RGV4100 NGK BR6HS PX6100/e NGK BR6ES Electrode gap
  4. 0.02 to 0.03 in. (0.6 to 0.7 mm)
  5. 0.03 in. (0.7 to 0.8 mm)

Source: manual:914-0109 Onan EGMBM Operators Manual (4-2008) .pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.