Hi fansill,
Answers to your questions depend on the individual coach. This is how mine works.
1. Does the coach shift forward slightly when the air is dumped? (Brake was on)... Is this normal?? Yes and my jacks to not extend straight down. They extend a bit toward the outside of the coach.
2. If the coach does normally shift forward, I would imagine that it is prudent to always dump air before letting levelers hit the ground to avoid a possible "bending" of the levelers...Correct?Yes, it also allows the coach to be leveled with a minimum of the jack cylinder being extended.
3. So is the best order...????
a. Turn off ignition - coach in park.
b. Put brake on.
c. Dump air.
d. Level coach.
e. Turn off levelers.
f. Turn ignition or generator on to deploy slides.
That is a good and safe process. However, one should always follow the manufacturer's recommendation for leveling and extending slides. Gut feel says you do not need the engine or generator running to level and move slides. My coach does not need these running. However, I do not know your brand of coach.
Some coaches require the engine to be running to move the slides and some do not require it. Coaches requiring the engine to be running rarely have an air bag suspension. Coaches having an airbag suspension should not required the engine running to deploy jacks or move slides.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
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Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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