Generator won't run

[msksann]

Hi Ryan:

Check the simple stuff first. Temporarily, pull the wire from the low
coolant sending unit and the low oil pressure sending unit, and see if
it will run. Both of these sending units work on a grounding principle
and they activate the engine shut down solenoid, when they detect too
high of a coolant temperature, or too low of an oil pressure. Check
the 10 amp glass fuse in the front of the control box Check the
breaker box located (on mine), on the left wall of the generator
compartment. But before you start worrying about the voltage
regulator, don't forget to check the 8 amp glass fuse located behind
the back cover of the gen. Extend the slide, crawl under the bus into
the back of the gen compartment. (if your slide is hydraulic, close
the locking latch, this disrupts power to the slide mechanism, and
helps prevents the pesky BB gremlins from ruining your day) 4 screws
to remove the back metal cover and you will find the inline 8 amp fuse
(Buss ABC8).
Mine had a similar problem as yours, and this is as far as I got. When
I found the blown 8 amp fuse, I felt like I had won the lottery!

Good Luck
I hope this helps

Michael Kramer
San Diego, CA
86PT40 8V92
Yanmar/ Kohler 12.5

--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Short story: Genset won't run. It starts, then immediately shuts back
> down. No load on it at all. When starting, throttle solenoid is
> observed pulling back to start, but then releases fully and lets it
> die. Oil pressure gauge shows 90psi (!). Gauge works - it goes all the
> way up during starting, then drops to 90psi, then genset shuts down.
> I'm assuming at this point it thinks something is wrong with the oil
> and shuts itself off. If I manually hold the the throttle, it
> continues running fine. Oil level is OK, just below the second mark on
> the dip stick. I changed oil, filter, & both fuel filters maybe a few
> dozen hours ago.
>
> Help! What do I do next?!
>
> '86 PT-40 8V92, Yanmar 12.5kw genset
>
>
>
> Long story (or, how we got to here): I took the bus in to a local RV
> dealership to have the hydraulics fixed. They found the problem, one
> of the jacks is leaking - more on that in another email. I asked them
> to start the generator and run it all day with the front A/C on full
> to keep the bus cooled down - it's >105 degrees here during the day
> right now. When I arrived to pick the bus up, the sales lady was
> inside trying to start the generator over and over again. She says it
> was running fine for several hours when one of her techs shut it down
> because they thought it was left on by accident. (Tech didn't know I
> wanted it to stay running to power the A/C). So she went back out to
> restart it and it wouldn't start.
>
> That's the story. It was working fine before I dropped it off and
> their work had nothing to do with the generator, so they shouldn't
> have touched it. They claim they didn't. I'm assuming at this point
> something just failed and need any advice I can get.
>
> -Ryan
> '86 PT-40 8V92
> Tri-Cities, WA
>