Generator Problem

[Ralph L. Fullenwider]

Excellent! The relay is clicking, meaning it is being told to pull in and
pass 12 vdc to the start solenoid but it is not getting there. Now then, I
believe there are external plugs on the control box, 2 maybe 3 of them? Un
plug the connectors, clean them and try a start.

These same connectors send the 12 vdc to the slip rings on the rotor
supplying the "flash" voltage to start the EMF building as the rotor turns
inside of the stator (field) and that supplies voltage to the regulator and
eventually builds to 110vac to pull in the 110vac relay in the control box,
keeping the gen set running and giving you leg 1 and leg 2 AC voltage to
the Coach.

I believe that you have some corroded or dirty connectors.

Ralph

At 03:37 AM 7/11/2010 +0000, you wrote:

>I checked that and there was nothing for voltage. at the small terminal
>and ground. Just an occasional clicking sound that is coming from one of
>those small plastic bosch boxes inside the control box. Robert
>--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
> wrote:
> >
> > Need to check between a ground point and the small terminal, then switch
> > the start switch and see if you read 12 vdc. From ground to the small
> > terminal there should be no voltage until you hit the start switch.
> >
> > The start switch supplies power to the small terminal (coil) of the
> starter
> > solenoid and pulls it in to pass full volts DC to the starter.
> >
> > Ralph
> >
> > At 02:48 AM 7/11/2010 +0000, you wrote:
> > >So I checked and there is 12.9 volts between the small terminal and the
> > >large terminal all the time weather the start switch is depressed or not.
> > >if i go between the small terminal and the second large terminal there is
> > >no voltage. There are three bosch little boxes in the controll box. some
> > >of the time when the start switch is depressed, one of them makes a
> > >clicking sound. I went to napa and bought another one of these, it makes
> > >the same clicking when start is depressed. Robert
> > >
> > >--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
> > > wrote:
> > > >
> > > > Nah, not over your head yet, your doing fine.
> > > >
> > > > Now then we know the battery is ok and the starter is running, now
> we need
> > > > to get 12 vdc to the small terminal on the starter solenoid sitting
> on top
> > > > of the starter. So place your mater red lead on the terminal and
> the black
> > > > on a ground and set the meter to dc volts. Check the voltage on the
> small
> > > > terminal when you flip the start switch on the control box, you
> should see
> > > > 12 vdc? If you do see 12 vdc then the starter solenoid is suspect,
> and if
> > > > you don't see the 12vdc then we trace back to the point of where we
> lose
> > > > it, and I will have to go get my schematic for the Yammar.
> > > >
> > > > Ralph
> > > >
> > > > At 12:36 AM 7/11/2010 +0000, you wrote:
> > > >
> > > > >Ralph, so I went back out to check a few things. The starter will
> not run
> > > > >at all from any of the switches. The battery is new and 12.9 volts. I
> > > > >checked at the top of the starter and it is 12.9 there as well. When I
> > > > >jump across the two large posts on the starter the gen starts and
> runs as
> > > > >long as the actuator is held in. When I switch the coaches manual
> power
> > > > >switch from 50 amp to gen. there is no power in the coach. I
> checked the
> > > > >coolant level and oil level and checked for any disconected wires on
> > > > >anything ion the engine. There is only a small 10 amp fuse on the
> control
> > > > >box and that is okay. The items you listed under further checks I
> am not
> > > > >at all familiar with. Am i over my head with this already, or is there
> > > > >anything I can check? Thanks for your help,
> > > > >Robert
> > > > >--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
> > > > > wrote:
> > > > > >
> > > > > > Hi Robert:
> > > > > >
> > > > > > The fuel solenoid is what your holding slightly to run the
> generator.
> > > > > There
> > > > > > are several things that will be the reason for it not to pull in.
> > > So here
> > > > > > go a few questions to you;
> > > > > >
> > > > > > 1. Is there voltage on the coil of the start relay located on top
> > > of the
> > > > > > starter?
> > > > > > 2. Does the starter actually try to turn the engine over?
> > > > > > 3. Check the fuse or circuit breaker on the control box?
> > > > > > 4. Check the coolant fluid level?
> > > > > > 5. Check the oil level?
> > > > > > 6. checked to be sure wire did not come off the high water temp
> > > switch?
> > > > > and
> > > > > > grounding some where. or hwt switch failed closed.
> > > > > > 7. Wire off the oil pressure switch?
> > > > > > Answering the questions are the first steps to be taken, I
> write the
> > > > > checks
> > > > > > down as I go to keep track of where I have been
> > > > > >
> > > > > > Now then, with the engine running, you say there is no output from
> > > the gen
> > > > > > set? and does your Coach have a manual or automatic transfer
> switch?
> > > > > >
> > > > > > Further checks;
> > > > > > 1 As Ernie said, check the state of the gen battery
> > > > > > 2 check the diode on the curb side down by the oil pressure sender.
> > > > > > 3 Check the bearing in the end bell, does it move up and down
> > > greatly with
> > > > > > a screw driver used as a pry bar?
> > > > > > 4. Is a wire broken off one or both brushes on the slip rings?
> > > > > > 5. is the diode and fuse on the quadrature windings ok?
> > > > > >
> > > > > > Answer those questions and we can go further
> > > > > >
> > > > > > Safe travels,
> > > > > >
> > > > > > Ralph and Charolette Fullenwider
> > > > > > "84FC35 "Ruff Diamond"
> > > > > > Duncan, Oklahoma
> > > > > >
> > > > > > At 09:43 PM 7/10/2010 +0000, you wrote:
> > > > > > >I am having trouble with the genarator in my 88 pt 40. It is a
> > > yanmar. I
> > > > > > >started it and it ran for some time normally then shut off.
> Now it
> > > will
> > > > > > >not start from any of the switches, I just get a clicking noise
> > > from one
> > > > > > >of the bosch relays in that little metal box by the gen in the
> > > foreward
> > > > > > >compartment. I replaced that and it does the same clicking. I can
> > > start
> > > > > > >the genarator by jumping across the starter while holding the
> throttle
> > > > > > >solonoid in a bit, but it stopps as soon as I let go. I checked
> > > and there
> > > > > > >is no voltage at the solonoid while it is running. Also there
> is now
> > > > > power
> > > > > > >in the bus while the genarator is running. Any ideas?
> > > > > > >
> > > > > > >Robert Rahn
> > > > > > >88 pt 40
> > > > > > >Kalispell, Mt
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >------------------------------------
> > > > >
> > > > >Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > > Safe travels,
> > > >
> > > > Ralph and Charolette Fullenwider
> > > > "84FC35 "Ruff Diamond"
> > > > Duncan, Oklahoma
> > > >
> > >
> > >
> > >
> > >
> > >------------------------------------
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > Safe travels,
> >
> > Ralph and Charolette Fullenwider
> > "84FC35 "Ruff Diamond"
> > Duncan, Oklahoma
> >
>
>
>
>
>------------------------------------
>
>Yahoo! Groups Links
>
>
>
Safe travels,

Ralph and Charolette Fullenwider
"84FC35 "Ruff Diamond"
Duncan, Oklahoma