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Battery
- Thread starter AllDodge
- Start date
doublewide
Senior Member
I got this switch for my dozer;
http://www.amazon.com/dp/B000CON4MA...UTF8&colid=262QBV170RD6O&coliid=ITX3TJX9B23TH
Nige
Senior Member
The regulator assembly for that alternator that contains the diode pack is available separately, Part Number 7N-5961.
RonG
Charter Member
I have had good luck with the Sears Diehards but I never bought them for equipment.The battery in my truck is still good after not being charges for the 2.5 years I was in rehab and I have been home for 1.5 years and it was not new when I went away.I have heard about the Cat batteries and know of others that use them in their personal pickups etc.I can see why after reading Niges comments.Ron G
ol' Grump
Well-Known Member
You could also add a Hobbs pressure switch into the ALT circuit. .with the engine off, it disconnects and as soon as the engine builds oil pressure it switches the alternator in. It's the same switch as is used for hour meters. Check with your local NAPA store
Go figure ALT cost 568 and regulator cost 261
Maintenance charging or switch looks a whole lot better
Don't think the hobbs switch would work, correct if I misunderstand. The leaking current is going from the battery to the output terminal of the ALT (40 AMPs). Switch is not made to handle that amount of current. Don't see the current leaking through the field side because my key switch disconnects this side.
Maintenance charging or switch looks a whole lot better
Don't think the hobbs switch would work, correct if I misunderstand. The leaking current is going from the battery to the output terminal of the ALT (40 AMPs). Switch is not made to handle that amount of current. Don't see the current leaking through the field side because my key switch disconnects this side.
Nige
Senior Member
Is pulling a terminal off the alternator when the machine is laid up for long periods an option..?
Actually that would even be the easier option
Former Wrench
Senior Member
Have the diode in the alternator checked. If bad, it would cause a slow drain.
Nige
Senior Member
We've been there already - posts #18 & 19. The diode is part of the regulator package and a new regulator is $260. A replacement alternator would be almost $600. The OP decided he didn't want to spend that much.
How about a picture of the alternator? I'm guessing that Cat didn't make the alternator, and even if it is built specifically for Cat then the parts might be the same as other models from the same company, Delco, Denso, Prestolite, Motorolla or...
And if you can't find the parts, a replacement alternator that can be made to fit is another option.
And if you can't find the parts, a replacement alternator that can be made to fit is another option.
RonG
Charter Member
I am not sure if these folks still publish a catalog since the magic of the internet and I don't do the electronic repair that I used to do but I wouldn't be surprised if you can get the parameters of many devices that need to be replaced there is a good chance that they might be able to furnish a replacement by return mail in some cases.http://www.nteinc.com/
Ron G
Ron G
Here is my ALT, its a CAT part. I'm sure I could take it to the local ALT, starter repair shop and they could fix it for under $50. That said its also real easy to clip on a maintenance charger or disconnect the cable.
My 955 has a dead cell in it so I was unable to get it started today. Going to take it to CAT for a replacement if I can ever get them to answer the phone (long wait times). Just want to know what the current price for it is before I take the 1 1/2 hour trip.
My 955 has a dead cell in it so I was unable to get it started today. Going to take it to CAT for a replacement if I can ever get them to answer the phone (long wait times). Just want to know what the current price for it is before I take the 1 1/2 hour trip.
Dirt on top of batteries often gets some acid in it and it can discharge the batteries in a few days. Keeping the tops of batteries clean and dry is a good idea. A charging system that is over-charging will greatly shorten battery life. A dragging starter that pulls very high current is hard on batteries, too. Batteries don't like either extreme heat or extreme cold. Batteries should not be mounted where they can pick up extra heat from hydraulic tanks or whatever unless you're in a very cold area. If you're in a very cold area, a battery box warmer and a block heater would be good to have, if practical... maybe a hydraulic tank warmer, too.
Old Magnet
Senior Member
That's a Denso alternator (Nippondenso). Complete after market units can be had as low as $113.24. All a produced off shore. Google the 7N4784 number.
old-iron-habit
Senior Member
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I took the 24V one from my 922A loader to a local starter/alternator shop and they rebuilt it and also changed the built in regulator to make it a one wire alternator. Cost me $93.00 about two years ago. It looks like the one in your picture. Mine was not working when I bought the loader and someone had put a 12 volt regulator on the 24 volt alternator.
Although I have operated dozers occasionally over the last 30-odd years, I have only owned my own (just a li'l Furukawa CD5B) but have also had trouble keeping my batteries charged. To be honest, I think my alternator is faulty (haven't checked it thoroughly yet) but the easiest way to maintain charge is to simply lift the seat and disconnect the battery leads after I have finished work. It is a 2-minute job and a solution that is foolproof!
Once I have found the reason for my batteries discharging, I plan to use a couple of 12V trickle chargers to maintain them; I have not found a 24V trickle charger (don't even know if they exist!), but 12V units are readily available at low cost, so just using one on each battery is a simple and low cost solution. I use a trickle charger on one of my other vehicles that I only drive occasionally and it works a treat. In fact, the previous battery in that car lasted 6 years and an auto electrician told me that using the trickle charger was undoubtedly the reason for the extended battery life.
As for my dozer problem, I am unsure whether it is leakage in the wiring harness (I can see that a previous owner has meddled with the electrics), leakage through the alternator, or possibly even quite simply that the alternator is not charging the batteries. I want to rip out the entire electrical system and replace it with a simple system that just provides the bare essentials.
Once I have found the reason for my batteries discharging, I plan to use a couple of 12V trickle chargers to maintain them; I have not found a 24V trickle charger (don't even know if they exist!), but 12V units are readily available at low cost, so just using one on each battery is a simple and low cost solution. I use a trickle charger on one of my other vehicles that I only drive occasionally and it works a treat. In fact, the previous battery in that car lasted 6 years and an auto electrician told me that using the trickle charger was undoubtedly the reason for the extended battery life.
As for my dozer problem, I am unsure whether it is leakage in the wiring harness (I can see that a previous owner has meddled with the electrics), leakage through the alternator, or possibly even quite simply that the alternator is not charging the batteries. I want to rip out the entire electrical system and replace it with a simple system that just provides the bare essentials.