Cummins/Onan — 5-1

For these Cummins/Onan models: MCGBA, MCGCA, MCGDA, MCGDB, MCGGA, MDGDA, MDGDB, MDGDC, MDGDD.

Applies to: Cummins Onan Mcgba, Cummins Onan Mcgca, Cummins Onan Mcgda, Cummins Onan Mcgdb, Cummins Onan Mcgga, Cummins Onan Mdgda, Cummins Onan Mdgdb, Cummins Onan Mdgdc, Cummins Onan Mdgdd

Procedure

1. 5. Maintenance Maintenance must be performed periodically. Table
2. 5-1 is a recommended schedule. Perform the spe- cified maintenance when the time interval has elapsed or running time has accumulated, whichev- er occurs first. Running time is recorded by a meter on the control panel. Keep an accurate log of maintenance to support warranty claims. See Introduction for contacting help when service or repair has to be performed. GENERAL INSPECTION Always be alert when the set is running for problems that could lead to equipment damage or personal injury. If it is necessary to perform maintenance or service, always disconnect the starting battery cables (negative [–] cable first) to prevent acciden- tal starting while working on the set. CAUTION Always disconnect a battery char- ger from its AC source before disconnecting the battery cables. Otherwise, disconnecting the cables can result in voltage spikes high enough to damage the DC control circuits of the set. WARNING Accidental starting of the generator set while working on it can cause severe per- sonal injury or death. Prevent accidental start- ing by disconnecting the starting battery cables (negative [–] first). Make certain battery area has been well-venti- lated before servicing battery. Arcing can ignite explosive hydrogen gas given off by batteries, causing severe personal injury. Arcing can oc- cur when cable is removed or re-attached, or when negative (–) battery cable is connected and a tool used to connect or disconnect posi- tive (+) battery cable touches frame or other grounded metal part of the set. Always remove negative (–) cable first, and reconnect it last. Make certain hydrogen from battery, engine fuel, and other explosive fumes are fully dissi- pated. This is especially important if battery has been connected to battery charger. Check the following daily. If the set is equipped with a sound shield, unlatch the appropriate access pan- el, swing it towards you and lift it out from the bottom catches. Engine Oil and Coolant Levels Maintain engine oil and coolant at the prescribed levels. Always check before starting the set. See Engine Lubrication and Engine Cooling in this sec- tion. Control Panel Check the control panel engine gauges and AC me- ters (if provided) for indications of abnormal opera- tion. Also, be alert for unusual noises, vibrations, smells and other indications that something may be going wrong. Exhaust System Look and listen for exhaust leaks, especially at joints in the system. Make sure the exhaust pipe or muffler is not overheating surrounding materials. Replace exhaust hose (wet exhaust systems) if it appears damaged from heat. WARNING Exhaust gas is deadly. All exhaust leaks must be fixed before running the set. Fuel System Check the supply tank, fuel lines, fittings, shutoff valves and filters for leaks before and while running the set. Check flexible fuel lines for cuts, cracks and abrasions. WARNING Diesel fuel is highly combustible. Even a small leak can lead to an uncontrollable fire aboard the vessel. Fix fuel leaks immediate- ly. Battery Terminals and Cables Check for loose or corroded cable connectors and broken cable strands. Redistribution or publication of this document, by any means, is strictly prohibited.

Source: manual:960-0151B Onan MCGBA CA GA DA DB DA DB DC DD Operators Manual (6-2000) .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.