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Cummins/Onan — PRESTART CHECKS

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. 1. Check to see that an approved fuel / water sep- arator has been installed upstream of the en- gine-mounted fuel lift pump. A fuel / water sep- arator kit that mounts on the flywheel housing is available from your distributor (Figure 1-1). CAUTION Failure to provide an approved fuel/water separator and filter upstream of the engine-mounted fuel lift pump can lead to pump and injection unit failures and con- sequent disabling of the set.
  2. 2. Check the Fuel Supply. Prime the engine fuel system, if necessary, as described in Mainte- nance.
  3. 3. Always check engine Oil and Coolant levels before starting the set. See Maintenance. WARNING To prevent severe scalding, al- ways let the engine cool down before re- moving the coolant pressure cap. Turn the cap slowly, and do not open it fully until the pressure has been relieved.
  4. 4. Make sure the Sea Water Cock is open when operating a heat exchanger-cooled set. Prime the sea water pump if prime has been lost. See Maintenance. CAUTION The sea water pump has a neo- prene impeller that can disintegrate in a matter of seconds after the engine starts if pump prime has been lost. STARTING Press the local or the pilot house control panel switch to Start and hold it there until the engine starts up. CAUTION Excessive cranking can overheat the starter motor and cause it to fail. Do not crank the engine for more than 30 seconds at a time. Wait two minutes before trying again. Watch the engine gauges after the engine has started up. Normal oil pressure is 35 to 60 psi at nor- mal operating temperature. Normal charging volt- age is 26 to 28 volts for 24 volt systems and 13 to 14 volts for 12 volt systems. Engine coolant tempera- ture should be between 170°F and 210°F during op- eration. STOPPING Remove all loads from the set and let it run for five minutes to allow it to cool down before stopping. Momentarily press the control panel switch to STOP. BREAK-IN Change engine oil after the first 50 hours of opera- tion. See Maintenance. 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.