Generator Problem

[Ralph L. Fullenwider]

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
> > >
> > >
> > >
> >
>
>
>
>
>------------------------------------
>
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>
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Safe travels,

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