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Old 02-11-2021, 12:54 PM   #631
cwk
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Need chassis battery advice...

Decided to start the main engine yesterday, just because...

Note: Coach is still "stationary" during the remodel. There are too many things loose (e.g., washing machine not secured, cabinets in the middle of the floor, etc.) to drive this anywhere.

The engine turned over very slowly about 1-2 times then nothing. I have a plug-in 12V cigarette type adapter for 2 USB plugs. It has a voltmeter on it that displayed about 12 volts. After a few starting attempts this morning, I think it read about 10 volts. Yup, the batteries are weak.

For fun, I tried the momentary switch on the dash that is the battery boost. But, since I only have a relatively small, single 12V battery in there temporarily, it did not do much.

The chassis batteries are two 12-volt maintenance free batteries wired in parallel. I am guessing that they are about 10 years old. Yup, they are due.




I believe they are SLA (Sealed Lead Acid) batteries.

For now, I will simply try to charge these in place. I connected a small charger that is giving them about 3.5 amps of charge. Since I do not need to move the coach right now, I will see what happens. It may take a day or two at that rate, but time is not an issue right now.

I do want "maintenance-free" batteries. These are hard to reach and will be a pain to replace as it is.

What I do need to know is:

1) What replacements should I look for when it is time to replace them?

2) What does the "S" in "31S" mean?


No rush on this as the coach is parked at home.

Thanks!
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Old 02-11-2021, 05:58 PM   #632
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Hello Charles !
I believe the Letter signifies the performance parameter of the Battery.
I Always use Duracell - seem to get 7 to 8 yrs out of them- I think Your Batteries are Toast.
Great Job on you Coach !!
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Old 02-22-2021, 05:46 PM   #633
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Welding cable for batteries?

Chassis battery update: I used a small charger (about 4 amps) to charge the two 12V chassis batteries for about 3 days.

The main engine started fine. A couple of days later, still started fine.

So, the battery replacement can wait until more of the house remodel is done and is ready for the road.

So, thanks for the feedback.


Meanwhile, I am considering changing some of the battery cables. They probably have been in there for 30 years (1991) and look pretty dirty. Also, the new batteries for the house will have a different layout, so new cables will be required there. And, new wiring from/to the planned inverter/chargers is on the acquisition list.


I have read multiple times that "battery cables" can be replaced with "welding cables." They are much more flexible, so much easier to maneuver and install.

During my initial search I am finding at least two types of welding cables:

1) Class K (30 AWG strands;comes with red or black insulation)
2) Class M (34 AWG strands;usually has orange insulation)

From what I am reading, the Class M cable, with 34 AWG strands, is more flexible.

Is there a preference?

The plan is to cut the cable myself, use a hydraulic crimper to install copper ends, and use colored heatshrink to protect exposed area near the ends.


There is also marine cable.

Is marine cable a better alternative?
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Old 02-22-2021, 09:58 PM   #634
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Charles, i have always bought the pre made cables from the farm stores, for my semi's and for my MH's when I needed new cables! Way less expensive, and for what it's worth, they will last just as long as any other cable! They come in all sorts of sizes, colors, and length's!
Add it all up, by the time you buy the hydraulic crimper, the welding cable, and the ends, for a one time use, and the premade cables? Your choice? Rail!
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Old 02-22-2021, 10:50 PM   #635
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Quote:
Originally Posted by guardrail53 View Post
Charles, i have always bought the pre made cables from the farm stores, for my semi's and for my MH's when I needed new cables! Way less expensive, and for what it's worth, they will last just as long as any other cable! They come in all sorts of sizes, colors, and length's!
Add it all up, by the time you buy the hydraulic crimper, the welding cable, and the ends, for a one time use, and the premade cables? Your choice? Rail!
Thanks, Rail.

I already have the hydraulic crimper. I will be wiring up new inverters, batteries, etc. in locations unknown. I like the idea of adding a lug on one end, running the other end to its new location, then custom cutting to length.

The idea of using welding cable is the added flexibility of the cable itself. I understand that 4/0 battery cable is much harder to work with than 4/0 welding cable.

Maybe using black cables, then colored heat shrink to identify the polarities?
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Old 02-23-2021, 12:41 AM   #636
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Just wondering whether your odometer issue was resolved and if so, how? Do you have an e-mail address direct to Don at ISSPRO. Thanks
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Old 02-23-2021, 08:06 AM   #637
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Just wondering whether your odometer issue was resolved and if so, how? Do you have an e-mail address direct to Don at ISSPRO. Thanks
Speedometer issue not yet resolved. Other projects have taken a higher priority.

The contact information that I have for Don can be found in Post #79 of this thread.
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Old 03-01-2021, 01:38 PM   #638
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Battery harness

Iíve recently bought a 1991 American eagle coach and all of thee batteries were all stolen out of it and thee harness is laying on the the ground, so if u have pics of yours or how to wire it back up would be Awsome, so I can get her started
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Old 03-03-2021, 05:17 AM   #639
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Iíve recently bought a 1991 American eagle coach and all of thee batteries were all stolen out of it and thee harness is laying on the the ground, so if u have pics of yours or how to wire it back up would be Awsome, so I can get her started
Not sure if this will help, a really good photo is tough due to the location inside a really small compartment. Hopefully the thief didn't cut the main cables as they aren't any too long.

The swing out tray has the engine batteries, 2-12V with 12V output. On mine the engine batteries have several small wires that attach to the neg. terminal. These may have been added by the PO or they may have factory, not sure.

On the bottom 4-6V golf cart batteries with 12V output from all 4.
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Old Yesterday, 06:11 AM   #640
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Looks like that could be very helpful, going to start on hupty sumptuous Monday so Iíll let u no how it went, just hooking up chassy batteries first. ..thx u so much
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Old Yesterday, 07:01 AM   #641
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Cwk
IMO (may differ from others but read the link)
Marine cable will be your BEST cable for batty cables especially if around FLA battys. On marine cable each strand is tinned and will significantly reduce corrosion around any connection. Ancor wire is a good mfg.

Equally important is the terminal lug used. The best are power lugs not starter lugs. Power lugs have a longer and thicker barrel that gets crimped... room for 2 crimps. Also tinned copper lugs much better than bare copper. FTZ power lugs a good supplier.
Here is a great link. He also has other very good ones on crimpers & other (marine) electrical topics applicable to MHs.
https://marinehowto.com/making-your-own-battery-cables/
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