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Guages - Ammeter or voltage

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01-25-2008 12:58:30

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Hi, I need to replace my guages. The 606/656/2606 gas tractor currently has an ammeter guage that goes to +- 30 amps. It doesn't work. TSC has both volt and amp guages. Which is better to get? I think the amp guage is more expensive.

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01-25-2008 18:51:26

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Re: Guages - Ammeter or voltage in reply to bc, 01-25-2008 12:58:30

Thanks guys. I may try to do both. I have an extra hole where someone put in a volvo gas guage. It doesn't work and I don't see any place on the gas tank where any wire would hook to it. I could probably use that hole for a volt meter unless someone knows what cheap part(s)might make the gas guage work. Right now I just check the gas with a stick.

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Janicholson

01-25-2008 18:15:01

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Re: Guages - Ammeter or voltage in reply to bc, 01-25-2008 12:58:30

Bob M is very correct.
To change to a volt meter (that fits in the same dash hole) do this:
First see if one terminal of the meter is grounded to the case of the meter. If it is, and the meter has only one wire connection to it, it will not work well with a positive ground tractor. Volt meters are often one wire devices with the case grounded. A positive ground tractor would take a meter that was for positive ground.
Make this determination first before hooking or loosing a receipt. With the right polarity meter:
Disconnect the battery at the non-ground post.
Remove the existing amp meter and remove the wires from both terminals. Use a piece of rubber hose that the terminals will fit into, and slide it onto one of the bundle of wires taken from one post. Use a small (preferably brass) bolt and nut to fasten both sets of terminal rings together, eliminating the Amp meter. Tape up the connection well with black tape. Slide the rubber tube down over the connection to assure it is insulated from the metal in the dash, and other wires. Fill it with silicon RTV sealer (blue goo) to assure it is moisture proof. Connect the ground of the new gauge to a bright metal ground and put blue goo on that to keep it from rusting. Attach the other wire/terminal to the ignition switch so that it is on when the tractor is on. This is not to say it would discharge the battery, if wired to the bundle just described, but it is the way it cannot. Install the gauge in the dash and go. I hope this works out for you. Keep us informed with a followup when done. JimN

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Bob M

01-25-2008 17:27:42

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Re: Guages - Ammeter or voltage in reply to bc, 01-25-2008 12:58:30

Ideally you will have both an ammeter AND voltmeter (my old Kenworth has both...). This gives the most complete information on operation of the charging system. However if I can have only one of the other I prefer the voltmeter.

A voltmeter is easy to wire - no heavy wiring needs to be brought to it as with an ammeter. (Only a single light gage wire + ground are needed).

Depending on the resistance of the voltmeter it's OK to leave it permanently connected. (A good, high resistance voltmeter's current drain is much less than the self-discharge current of a good battery)

However it's easy to wire a voltmenter to turn off when shut down: Simply connect the + post on the voltmeter to either the IGN or ACC terminal on the ignition switch.

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Bus Driver

01-25-2008 17:00:33

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Re: Guages - Ammeter or voltage in reply to bc, 01-25-2008 12:58:30

A voltmeter must be disconnected when the engine is not running. If left connected, it will slowly drain the battery. So some wiring changes would be necessary.

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ScottyHOMEy

01-25-2008 13:14:51

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Re: Guages - Ammeter or voltage in reply to bc, 01-25-2008 12:58:30

I sometimes think it would be nice to have both! Helps to chase down gremlins whne they've been busy.

That said, the ammeter will wire in directly and does give you useful info as long as you check it periodically. Does the tractopr seem to charge okay otherwise? If so I'd say just replace the ammeter.

As for the volt meter, I may be washed up on this, but I suspect you'll have to rework your wiring a) for it to work right and b) to make sure it doesn't affect the functioning of your voltage regulator.

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tmonton

01-25-2008 14:19:44

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Re: Guages - Ammeter or voltage in reply to ScottyHOMEy, 01-25-2008 13:14:51

Setup is easy, providing its either 6 or 12 volts, take either side of the ammeter terminal to common(frame). If you peg the meter the wrong way .. reverse the leads.

Typical loads would be 50 milli amps. That would be 50 thousands of one amp. The internal leakage of the battery will far exceed that value.

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55 50

01-25-2008 15:02:53

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Re: Guages - Ammeter or voltage in reply to tmonton, 01-25-2008 14:19:44

What!!! Taking either side of the ammeter to common (frame) will most certainly burn up some wires unless there is a fuse in the line.

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tmonton

01-25-2008 15:22:01

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Re: Guages - Ammeter or voltage in reply to 55 50, 01-25-2008 15:02:53

a volt meter.

Ammeter measures current through a wire. Connected in series

voltmeter measures applied voltage across a source. Connected across source to common.

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w.g.

01-25-2008 16:53:38

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Re: Guages - Ammeter or voltage in reply to tmonton, 01-25-2008 15:22:01

call easy bobs tractor parts at 1-888-560-1466

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