Air system connection for air assist clutch - MCI?

[bevans6]

I'm going to be troubleshooting the air assist clutch cylinder on my 5C.  I want to be sure to drain the supply air to it before I work on it, which tanks do I have to be sure are drained, all of them or just the accessory.  this is sounding like a dumb question, I think the answer is all off them.

Brian

[Airbag]

Whatever you do not get under the bus with out blocking it. It will kill you if the airbags deflate. It should be supported like shown in the maintenance manual. As far as draining the air system you can fan the brake pedal to bleed off pressure.

Note: if you don't have the manual I strongly urge you to purchase one.

http://www.coachinfo.com/Manuals/Coach/MCI/MCI5C.html

[bevans6]

i have the maintenance manual, the DD manual and the operators manual.  The air connection for the air assist is not shown on any schematic.  I doubt I have to get under the coach to get at it, it kind of has to be on the side of the gearbox near where the clutch linkage is.  I expect I'll find it...

Thanks, Brian

[Fredward]

Brian,
On the MC-5 its easiest to get at from beneath. Before I replaced my clutch, I tried fixing the air assist also. It wasn't working because the linings were so worn that the clutch operation lever wasn't traveling far enough. I removed it, cleaned it and put it back in all to no avail. Then I took the engine out, replaced the clutch and now the air assist works fine. That took longer than servicing the air cylinder, however.

You definitely want the manual. That being said, I think the cylinder is on the same circuit as the wet tank. Release the air from the wet tank and I think the cylinder will be fine. It shares the air supply for the high idle and shut down skinner valves. Be sure you know where to block the bus.
Fred

[John316]

^^^^^^^^^^snip^^^^^^^^^

Sorry, I decided to start a new thread as opposed to hijacking this one .

God bless,

John