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Old 11-24-2019, 08:54 PM   #1
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Coolant change

I currently have a traditional antifreeze (purple stuff) in my coach that contains sca. I would like to switch to Fleet Charge which does not require checking sca concentration. Freightliner doesnít recommend using oat type antifreeze as it could cause issues with coolant sensors. Has anyone switched to oat type antifreeze and if so have you experienced issues with sensors. Thanks
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Old 11-25-2019, 02:39 AM   #2
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I switched to Global Fleet Charge 4 years ago. I flushed the system out and added the concentrate. I have since driven over 25,000 trouble free miles. I do check the antifreeze every spring with test strips.
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Old 11-25-2019, 12:36 PM   #3
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I've gotten advice from Freightliner who recommended I not replace my standard ethylene glycol with the extended life version of coolant.
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Old 11-25-2019, 01:44 PM   #4
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Same here. Freightliner said no extended life coolant.(ECL). I know there are many people that have used it with no issues and some that did. I went ahead and used Fleet Charge SCA coolant too since it meets CATs specs as well.
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Old 11-25-2019, 03:16 PM   #5
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I switched to Global Fleet Charge 4 years ago. I flushed the system out and added the concentrate. I have since driven over 25,000 trouble free miles. I do check the antifreeze every spring with test strips.
I was wondering if you have had to add any SCA to the Fleet Charge in the 25000 miles. I had contacted the manufacturer and they said shouldn't have to for 30000 miles. thanks
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Old 11-25-2019, 04:10 PM   #6
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How often do you guys check the SCA with the test strips and typically how much additive is required to rebalance? Is the amount more dependent on time or mileage? New to DP and trying to learn.
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Old 11-26-2019, 03:24 PM   #7
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How often do you guys check the SCA with the test strips and typically how much additive is required to rebalance? Is the amount more dependent on time or mileage? New to DP and trying to learn.
Every six months. The problem is nobody can tell you how much to add....from the manufacturer of the coach to the guys who make the strips. Also, the trouble with the strips is trying to match the color on the strip with the color of the coolant on the strip from the radiator. What looks orange to me, looks pink to the D/W. It is a very inexact method of keeping the SCA level correct. When some of my readings look low, I dump a 16 oz bottle of SCA in the radiator...very cheap, less than $5.
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Old 11-26-2019, 03:52 PM   #8
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....When some of my readings look low, I dump a 16 oz bottle of SCA in the radiator...very cheap, less than $5.

can you share the link to where you purchase your SCA ?
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Old 11-26-2019, 06:46 PM   #9
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Every six months. The problem is nobody can tell you how much to add....from the manufacturer of the coach to the guys who make the strips. Also, the trouble with the strips is trying to match the color on the strip with the color of the coolant on the strip from the radiator. What looks orange to me, looks pink to the D/W. It is a very inexact method of keeping the SCA level correct. When some of my readings look low, I dump a 16 oz bottle of SCA in the radiator...very cheap, less than $5.


Thanks. One of the reasons I was asking is I recently looked at two coaches (put a deposit on one) only to find out the coolant hadnít been checked or maintained in over three years. I backed out of both sales due to lack of maintenance by the owner.
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Old 11-27-2019, 11:14 AM   #10
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can you share the link to where you purchase your SCA ?
We have a Cat dealer in town, got it from them.
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Old 11-27-2019, 11:16 AM   #11
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Thanks. One of the reasons I was asking is I recently looked at two coaches (put a deposit on one) only to find out the coolant hadnít been checked or maintained in over three years. I backed out of both sales due to lack of maintenance by the owner.
I send a transmission fluid sample to a lab every year to be checked. This year I sent them a coolant sample. It came back as having way too much copper and to change it immediately.
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Old 11-28-2019, 09:24 PM   #12
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Take a look at this site. https://www.acustrip.com/sca.html
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Old 11-30-2019, 07:51 PM   #13
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Thanks, but I have that link. One of my problems is that I get a different answer from all concerned when I ask how much coolant my system takes. Freightliner says 31 gallons (yes, gallons), DD says 24 quarts (I told them it was a MH), and a dealer I tried said mid 20s, gallons.
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Old 11-30-2019, 08:46 PM   #14
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well, its not gallons. Its somewhere between 40 and 45 quarts most likely. I have never seen a coolant system that needed more than 12 gallons.
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