Generator Problem

[chaunceyboyblu]

Ralph, you were right it was that big black conector behind the control box. I
unscrwed it and found one wire corroded away to a green paste. I bypassed that
wire before the connector and the gen starts and makes power. Thank you for your
wise counsel sir. Robert
--- In WanderlodgeForum@yahoogroups.com, "chaunceyboyblu"
wrote:
>
> Okay I will check these connectors. Thanks for your help. Robert
>
> --- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
> >
> > 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
> >
>