We have three dump valves on the 42' Tour -- two grey tanks (60 gallons each) and the black tank -- also 60 gallons. I really like the large size of these holding tanks and they have worked well. However, after a few months of daily use, the valves start to get sticky and work with difficulty. Time to add grease fittings!
I originally got this idea from Mark Nemeth, Escapees' technical director and first used it on our previous 2008 Winnebago Tour. The modified dump valves worked great and I had no problems over 2 years of fulltime use, so I decided to do the same modification on our new coach.
You will need to get one 1/4" zerk grease fitting for each dump valve (I got mine at Lowe's), a 1/4" x 28 thread thread tap, 3/16" drill, and of course, a grease gun with grease. The zerk fittings are only a buck or so and the tap is just a few dollars, so this is a very inexpensive modification. I was able to install all three fittings in just a few minutes and the operation of the valves was immediately improved. See http://fulltime-rv.blogspot.com/2011/10/installing-grease-fittings-on-dump.html for pictures showing the procedure.
I originally got this idea from Mark Nemeth, Escapees' technical director and first used it on our previous 2008 Winnebago Tour. The modified dump valves worked great and I had no problems over 2 years of fulltime use, so I decided to do the same modification on our new coach.
You will need to get one 1/4" zerk grease fitting for each dump valve (I got mine at Lowe's), a 1/4" x 28 thread thread tap, 3/16" drill, and of course, a grease gun with grease. The zerk fittings are only a buck or so and the tap is just a few dollars, so this is a very inexpensive modification. I was able to install all three fittings in just a few minutes and the operation of the valves was immediately improved. See http://fulltime-rv.blogspot.com/2011/10/installing-grease-fittings-on-dump.html for pictures showing the procedure.