Cravin: We just had a blown line replaced (it had rubbed for 14 yrs on the oil cooler and worn a smallish hole). Because we had not actually run the slide in and out to full length we got lucky and did not have to do what DOC mentioned. But, the tech opened the two valves on the cylinders and ran the slide out and in to remove any bubbles/foam left in the lines. We waited a few minutes to let the bubbles/foam vanish and repeated. Once he was comfortable the fluid was "pure" he topped off the fluid at the appropriate level and closed the valves and replaced the fill cap. Next he ran out the slide, retracted it, and repeated that once more. He then let the cylinders cool and repeated that process again. He said the valve system would eventually self-balance the cylinders. If my slide had been cattywompus I think we would have done as DOC said and while the valves were open, tried to close the slide by hand to a fairly even position before running through the rest of the steps of bleeding and balancing the cylinders.
We used Bluemoon in Carrollton (Dallas) since they are an HWH authorized dealer. I would highly recommend them if they are in your service area.
Butch and Peggy
N.Central TX; 2000 Itasca Suncruiser 32V; Workhorse P-32 Chassis; 7.4L Vortec V-8 w/Banks Pwr Sys; Steer Safe; Springs/Airbags front; Timbren Suspension kit on rear; Onan 5K