Aquahot sooting up

[edroelle]

Craig,

3 possibilities come to mind.   the first 2 have been mentioned.
1.  Nozzle, recommended to change every year
2.  Low battery voltage - slow motor- poor chamber evacuation
3.  Slow motor - poor evacuation - change bearings.   Yours may be gummed-up from lack of use.   Webasto recommends changing every 4 years.  A couple hour job that is well within your skills.

How does your Webasto sound?

Ed Roelle

[gumpy]

Craig,

3 possibilities come to mind.   the first 2 have been mentioned.
1.  Nozzle, recommended to change every year
2.  Low battery voltage - slow motor- poor chamber evacuation
3.  Slow motor - poor evacuation - change bearings.   Yours may be gummed-up from lack of use.   Webasto recommends changing every 4 years.  A couple hour job that is well within your skills.

How does your Webasto sound?

Ed Roelle

Hi Ed,

Thanks for the response. I was not aware of the bearing change. I'll have to look into that.

It sounds about the same, but honestly, it seems to be quieter than I remember. Maybe it has more to do with there being more ambient noise,
but where we were parked, there's really no noise around. I could not hear it from inside the bus, which has not been the normal case. I suppose
the other possibility is that my hearing, like my eyesight is suffering from too many trips around the sun.    However, it seems to be blowing out
the exhaust with about the same force as before, prior to ignition, as well as during the burn.

When it warms up, I'm going to change the nozzle and clean out all the soot in the chamber and pipe. I'll look at that bearing change, too, and
see what that entails. Not sure where to get parts for it, so any suggestion on suppliers would be good. I bought my last nozzles from Nick Bedame.
Will probably order a couple more from him.

I'm not accepting battery voltage just yet because other than one night, the bus was plugged in and the inverter was charging properly. The one
night at Cabela's, though, it did draw the batteries below 24 volts, and I ended up turning on the generator for the rest of the night. But it was sooting
pretty much the whole time, even when plugged in and when the generator was on. I will be checking all my wire connections to the unit, too, though,
just in case there's some corrosion that might be causing low voltage.

thanks
craig

[dbenck]

HI Craig...try the navstore.com ...they are in Mpls. Have
ordered parts from them in the past, usually in stock.

David P. Benck
Somerset, WI

[OneLapper]

Craig,

The DBW2010 uses two 608-ZZ or 608-2RS bearings.  Grade 1 ABEC bearings cost about $2 each.  I was furious when I paid $50 for a pair, but I ordered them before I took mine apart so I didn't know what they were.  You can buy ceramic ball 608 bearings, too.  Don't get ripped off like I did.  BTW, they are not hard to work on. 

[Geoff]

This is all very interesting and pertinent to my situation.  I have not started my Webasto DBW 2010 since last year, and when I fired it up a month go, all it did was fire black smoke.  The last time I used it it ran perfect without smoke. So I let it run for 10-15 minutes hoping it would clear up, but it didn't.  Taking laser gun temps on the inlet and out side of the pump showed it was not warming up the coolant.

Jump to 3-4 weeks later--  I turned on the Webasto and got absolutely nothing--  the pump didn't start, nothing.  It's been too cold to fiddle with it and do a voltage/sensor test.  I have 479 hours on the unit.  I also have  new a nozzle to install.  I have had yearly problems with the Webasto but most of them was air locks.  Last year it was a bad flame sensor.

Back to work on the Webasto-- when it works it is great,  but I am getting tired of these yearly repairs.

--Geoff