fagnaml

Onan Diesel Generator Repair -- Houston Area

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fagnaml   

The small coolant leak I had from my Onan 7500 watt Quiet Diesel generator has grown worse meaning time for repair.   The generator is not on a slide out tray thus it needs to be dropped out of the frame an onto the ground to remove the cover and access the engine.   For the moment I have an appointment for next Thursday, 8/9/18, at Cummins Coach Care (Cummins Service Center) on I-610 on the northeast side of Houston.     In addition to finding and repairing the coolant leak, what other "routine maintenance" should be performed while the generator "is on the ground"?   I'm thinking replace any belts, replace coolant hoses, thermostat (presume it has one?), etc.   Should the glow plug be replaced?  The generator is a 2007 model and next week will be the first time the engine has ever been exposed.

Any routine maintenance items for the generator itself?  Replace brushes perhaps?   The generator has 600 hours of use.

Also, for folks from the Houston area, does the Cummins Service Center provide good service?   Because the generator has to be dropped to the ground to access the engine, the other RV repair businesses I've called are very reluctant to do the work.

Thanks for your thoughts / guidance!

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manholt   

Mike they took my 10KW out and replaced the brushes in 2015.  Have nothing but praise for their ability!  Don't forget to join Cummings Club, when you get there...10% off ! :wub: 

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Mike, There is a standard parts replacement when doing the repair on the 7.5 / 8 KW units at the 1000 hr. mark.

Replace the air filter, fuel filter, fuel pump, the water pump drive belt,(Water pump?) check the glow plugs(They often just replace them because of the labor involved in dropping them) check injectors and check the system control board. The oil filter and oil is replaced. The unit should be then tested before being reinstalled !!!

So ask questions - as a general practice take a picture of the connection in the 4 in. square "J" box where the generator output interfaces with the Coach wiring going to the ATS.  There are a number of items that need to be removed to allow the unit to clear the opening. Go over the process with the shop shop job writer.

In your case add coolant and radiator. What coolant do you run in the coach engine? will it work for the generator. Same coolants means one less item to carry. 

Rich.

Cumming Onan Texas.

39. Cummins Rocky Mountain 14333 Gateway West El Paso, TX 79928 Toll free: 800-800-4240

40. Cummins Southern Plains 7045 N. Loop East Houston, TX 77028 Toll free: 800-474-7421

Oklahoma

34. Cummins Southern Plains 16525 E. Skelly Dr. Tulsa, OK 74116 Toll Free: 800-722-2743

 

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Several years ago I had to get towed to Cummins Houston. It would have taken six weeks for Winnebago to start a manufacture of the engine wiring harness - don't keep them in stock and they re-manufacture them on the go. Houston Cummins was able to repair the harness and I was on the road in about 4 days.

Great service.

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RAYIN   

Replace the coolant temp sensor, it's a bear to access on a slide-out genset. Sometimes it has been there so long it's corroded into the metal housing, which breaks  when a rough hand is on the wrench.

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