I have a 2004 6340 with 65,000 miles on it. So you know there are many 6340 owners on here. I think you’ll have better luck asking a direct question about each issue one OT a time.
When it comes to your black tank, yep the only way is to drag the hose inside, buy a good sideways spray wand and flush a way. Most black tank issues are the same as your trailer experiences; mounding “not using enough water when flushing. I’m one of the lucky ones whom have a dump station at home.
Note: they do make 3”clear dump hose connectors with a garden hose spray hook up.. waste of money…
Mike Root
Tulalip Washington
35 miles northwest of Seattle
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