I have wanted one of these for years, but the price was always more than I could justify for my needs.
They have a stack of carbon disks and you vary the current by turning the knob to clamp them together tighter or looser depending on the battery. It is calibrated for 12 volts, and the amp meter has various scales you use to set the current, the basic formula is the current draw should me adjusted for 1/2 the CCA, or 3 times the AH, depending on whether starting type or deep cycle, and it should stay above 8 volts for 15 seconds.
The voltmeter is even calibrated to allow for temperature.
To use it on 6 volts, it is necessary to disregard the 2 bottom scales and adjust the amp meter according to the formula above. Unfortunately 200 amps was the highest I could get it on any of my 6 volt batteries, but still it is a much better test than the load testers we normally use. They are not adjustable, and are normally a 100 amp load at 12 volts, but that is only 50 amps at 6 volts. For the voltage readings on 6 volt, the pass fail is 1/2 the volt readings for 12 volts.
Friday I tested 4 tractor batteries (6 volt), and the 2 batteries in my scooter, my ZTR, 8500 watt generator Escort, and Escape, Ranger, plus one under my bench that provides power for my Sirius radio, and anything else I need to run. Some of them were over 5 years old, but all passed with flying colors except for the ones in the golf cart and Escort. The Escort battery was so weak I put my jump starter pack in the trunk just in case, but there was no need, it failed to start today before I left home. The battery in my ranger was original (6 years old), but tested good, so it is now in my 18 year old Escort, and the Ranger has a new Battery. The golf cart requires such a small amount of current to crank the little 2 cycle engine, and never gets far from home, so I will just run it till it finally dies.
The local Harbor Freight had the tester on sale for $50 during it's grand opening.
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carbon pile battery load tester
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- John *.?-!.* cub owner
- Cub Pro
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- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
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carbon pile battery load tester
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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- 10+ Years
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Re: carbon pile battery load tester
I have had my HF load tester for a couple of years and use it to test batteries each time I change oil or suspect that it is degrading. It has held up well.
A big benefit in this tool is the analog volt meter which is essential for checking generator charging system voltage. Anyone who has tried to check one of our old charging systems using a digital meter knows what I mean.
Ron Tyrie
DSCF here we come!
A big benefit in this tool is the analog volt meter which is essential for checking generator charging system voltage. Anyone who has tried to check one of our old charging systems using a digital meter knows what I mean.
Ron Tyrie
DSCF here we come!
- Stanton
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Re: carbon pile battery load tester
Nice buy, John. Looks like you got a good tool at a great price!
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Re: carbon pile battery load tester
I used this type of tester a lot, years ago. We had a Sun analog and later, a Peerless digital. I didn't know Harbor had one available. I sometimes see used ones at swap meets and flea markets but you can't tell if they are good or not. We sometimes had problems with the Sun unit, broken carbon discs and such. If you find one that's been used in a truck shop, and tested a lot heavy batteries, there's a good chance it will be damaged. That is a great tester, though.
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: carbon pile battery load tester
This one is supposed to go up to 500 amps on 12 volts, which would make it 250 on 6 volts, but I would have had to crank it extremely tight on the carbon disks, and I have spent my working life repairing electronic equipment, including test equipment that has been abused, so I decided not to push it that far. One thing I would strongly recommend on this unit is to back the control knob off when not in use so the carbon disks are not stored under pressure.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: carbon pile battery load tester
Been using the battery tester for a couple months and happy with it until last Friday. I went down to help a neighbor that was having battery problems with his Twin battery (875CCA each) Dodge diesel dually, and while I was checking the second battery the tester started smoking, and before I could disconnect it there was quite a bit of flame inside it around where the Positive cable comes through the grommet in the side. I jerked both clamps loose and through it on the ground a few feet away, and the flames soon went out. My wife and daughter had planned a trip to Farmington today, so I went along and took it along with my original receipt back to Harbor Freight. I told them what my problem was and showed them the burnt area and they asked me if I wanted another of the same model or my money back. I got the replacement. I do not yet know if it was defective or if I should have let it cool longer than I did when checking 2 batteries that large in a row.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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- Team Cub Mentor
- Posts: 5609
- Joined: Thu Aug 03, 2006 6:20 am
- Zip Code: 43358
- Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D - Circle of Safety: Y
- Location: OH West Mansfield
Re: carbon pile battery load tester
I've noticed that Harbor has had these listed in recent sale fliers. The price is reasonable enough. Yes, you probably overworked it on those two big diesel batteries. But hey, Harbor made it right!
- brichter
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Re: carbon pile battery load tester
Hey you old cheapskate:
you get what you pay for in electronics. (and most other stuff).
you get what you pay for in electronics. (and most other stuff).
If you're gonna dream or steal, do it BIG
The best things in life aren't things.
1951 Cub
1963 Corvair
lots more junk
The best things in life aren't things.
1951 Cub
1963 Corvair
lots more junk
- Stanton
- Cub Pro
- Posts: 7760
- Joined: Mon Jun 22, 2009 6:56 am
- Zip Code: 64070
- Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066 - Circle of Safety: Y
- Location: Lone Jack, MO
Re: carbon pile battery load tester
John *.?-!.* cub owner wrote:...My wife and daughter had planned a trip to Farmington today...
Did you eat at the Catfish Kettle while there??? Good stuff.
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- Team Cub
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Re: carbon pile battery load tester
Gary Dotson wrote:I've noticed that Harbor has had these listed in recent sale fliers. . . .
By any chance was it listed as a fire sale?
I generally avoid buying sparky stuff from Harbor Freight.
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: carbon pile battery load tester
I seldom buy electrical items there either, but decided to try this one.Jim Becker wrote:Gary Dotson wrote:I've noticed that Harbor has had these listed in recent sale fliers. . . .
By any chance was it listed as a fire sale?
I generally avoid buying sparky stuff from Harbor Freight.
Local farm supply store also has a branch that is in a flood area and has on a couple occasions had flood sale items from there. They use different colored tags to mark prices, and on the register receipt it lists the item by the color of the tag. I realized after I had gotten home I had bought a couple of "YELLOW FLOOD" items.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
-
- Team Cub
- Posts: 17214
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: carbon pile battery load tester
John *.?-!.* cub owner wrote:. . . I realized after I had gotten home I had bought a couple of "YELLOW FLOOD" items.
I thought of a couple comments. I'll just go with the observation that they might want to reevaluate that approach.
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