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Author Topic: diesel gen. oil change  (Read 3282 times)

havgoods

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  • 2003 winnebago ultimate advantage/ 2003 jeep wrang
diesel gen. oil change
« on: January 31, 2013, 12:08:20 AM »
can someone tell me how much oil a 7500 quite diesel  generator holds, and what filter to use. I thought I would save some money by doing the oil change myself.

Tom

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Re: diesel gen. oil change
« Reply #1 on: January 31, 2013, 07:23:54 AM »
You could try the Cummings/Onan web site.
Tom.  Need help? Click the Help button in the toolbar above.

Gary RV_Wizard

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Re: diesel gen. oil change
« Reply #2 on: January 31, 2013, 08:45:33 AM »
The Onan QD 7500 use 3 quarts of oil and most people use the same 15W40 used in the coach diesel engine. The filter is an Onan 122-0833 (replaces the original 185-5409) and the NAPA 1064 is equivalent.

The air filter is an Onan 140-2897 and the fuel filter is an Onan 149-2513, with the  NAPA 3063 or Wix 33063 as equivalents for fuel.
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

WILDEBILL308

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Re: diesel gen. oil change
« Reply #3 on: January 31, 2013, 10:22:27 AM »
Gary and Tom have some good info. There is no reason you canít do your own oil changes on your generator. I would make a quick reference list with all the part numbers so you will have them next time. I keep a copy in the RV as well. I would also add the serial numbers for your generator, engine, coach and transmission.
The only thing I do differently is I use Mobil-1 5-40 Turbo Diesel Truck in both the gen and the MH.
Hear is a video that may help you
http://www.youtube.com/watch?v=CxqkHAAH818
I would use some anti seize on the spark arrestor plug if it was me. I also believe it is important to use a low silica antifreeze in the radiator.
Bill
2003 Bounder 38N
300 HP 5.9 Cummins
Allison 3000MH Trans.
Towing 2014 Honda CRV
Home base Fort Worth, Texas
A man who carries a cat by the tail learns something he can learn in no other way.
-Mark Twain-

havgoods

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  • 2003 winnebago ultimate advantage/ 2003 jeep wrang
Re: diesel gen. oil change
« Reply #4 on: February 03, 2013, 10:59:40 PM »
many thanks to everyone! now I have all the info I need to do the oil change. I appreciate all mthe help.

Gary RV_Wizard

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Re: diesel gen. oil change
« Reply #5 on: February 04, 2013, 07:49:03 AM »
I'll warn you, though, that changing the fuel filter on a QD7500 or 8000 is a real PAIN! You have two get two wrenches up into a tiny recess on the bottom, while lying on your back with diesel dripping down your arm.

The oil filter is in a recess underneath too, but it's just a spin-on and not difficult.

My genny oil gets changed every year when I do the chassis engine oil change, but the genny fuel filter gets changed only once in great awhile.
« Last Edit: February 04, 2013, 07:50:35 AM by Gary RV Roamer »
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

hapecamper

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Re: diesel gen. oil change
« Reply #6 on: February 13, 2013, 07:08:25 PM »
What is an example of low silica antifreeze?
Dave
2005 Holiday Rambler Endeavor 38 PDQ
Toad - 2012 Silverado W/2007 FLHX in bed

Gary RV_Wizard

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Re: diesel gen. oil change
« Reply #7 on: February 14, 2013, 09:17:01 AM »
Anything rated for diesel cooling systems. Fleetguard has several. If it doesn't say diesel somewhere on the container, I would shy away from it.

Here is an excellent article of diesel coolants by a knowledgeable RV owner http://www.rvcruzer.com/coolant.php?p:
Gary
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Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

WILDEBILL308

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Re: diesel gen. oil change
« Reply #8 on: February 15, 2013, 08:22:52 PM »
I would recommend the OAT coolants as I had a problem with my Onan or I should say the dealer had a problem. The generator was overheating. The dealer had to remove it and take it to the local Onan dealer to have it checked out. They had to replace the radiator as it was plugged with crystals. I have been told the crystals form when the generator isnít run enough. Just one more reason to exercise your Onan.
Bill
2003 Bounder 38N
300 HP 5.9 Cummins
Allison 3000MH Trans.
Towing 2014 Honda CRV
Home base Fort Worth, Texas
A man who carries a cat by the tail learns something he can learn in no other way.
-Mark Twain-

Tanner

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Re: diesel gen. oil change
« Reply #9 on: August 28, 2017, 11:38:31 AM »
Just changed oil and filter in my onan 7500 and found 3 quarts is not enough.  Have 3.5 qts and still need more although everything I read says 3 qts with filter.  Any thoughts?

Rene T

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Re: diesel gen. oil change
« Reply #10 on: August 28, 2017, 02:12:00 PM »
Just changed oil and filter in my onan 7500 and found 3 quarts is not enough.  Have 3.5 qts and still need more although everything I read says 3 qts with filter.  Any thoughts?

Tanner, welcome to the forum. Just a little friendly advice. Start your own post on this issue. It saves everyone from reading a entire post especially if it's  almost 5 years old like this one. 
Rene & Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

 

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