Since I have only been on this list for about 6 months, I'm not sure if
this has been stated before.  If so, it probably deserves repeating
anyway.

Please note that in Bentley (80 thru 91 version) the diagram for the
Vanagon air conditioning system on page 87.2 has the labels for the high
pressure hose and the low pressure hose REVERSED.  The one labeled 11
going directly to the compressor is actually the low pressure hose.  The
hose labeled 10, between the pressure switches and the evaporator is
actually part of the high pressure side.
  Perhaps this has been corrected in later printings, but mine is
clearly backwards.
    The note on page 87.3 contradicts this incorrect diagram and the
correct schematic drawing on page 87.7 does also.  Read the whole
section before you do anything.  If a person simply believed the drawing
on page 87.2 and connected a can of refrigerant to the high side it
would very likely explode.

Take care,
Larry A.