35v may infact be the open circuit voltage. Check if you are getting 35v at the battery terminals. That would explain the heat. Sounds to me like a bad charge regulator or bad interconnecting wiring on the sensing line. A standard lead acid 12v system should be limited to ~14.7v. Double that for a 24v system.
With an external regulator the regulating terminal on the alternator connects to the regulator. This single wire provides the feedback to the alternator that it is providing enough (or not enough) voltage. Simple regulators rely only on voltage but the better external regulators will use a shunt to provide a current feedback to the regulator as well. The current is/should be directly proportional to the differance in voltage between the battery and the alternator output. The current should also be limited (by limiting the difference in voltage) to the max charging voltage of the battery (type) and the max output of the alternator. Disrupting the current and/or voltage sensing lines to the regulator or the regulating line to the alternator will cause improper voltage output from the alternator. 35v sounds VERY improper. This "disruption" is the reason that turning the ignition key to the off position before pulling the stop plunger can cause a blown alternator on some systems. The key disrupts the regulating signal and the alternator goes to max output. Let us know what you find. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Jul 5, 2014 12:05 PM, "Kevin Driscoll via CnC-List" < cnc-list@cnc-list.com> wrote: > On our anniversary sail up to Victoria, we pulled in to Gray's harbour, Wa > last night because the batteries are not charging. Looking for suggestions > of diagnosis / solutions. See below: thanks > > The alternator belt was somewhat loose but I tightened it and no luck on > charging. Tested terminals on back of alternator and reading was same > before and after tightening... About 35 volts. > > About to start this morning by checking / cleaning battery terminals and > other connections from alternator back. Hoping this could be the issue > because as I previously posted my starter has been giving me the clicks. I > have the faint glow on the Charging indicator lamp at the engine panel too. > I have a heart interface "incharge " alternator regulator. > > Any other suggestions? > > Thanks > Kevin > > Sent from my Tablet > > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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