page 103 of 121
➨
Loosen the union nut (K) of the hose con
-
nection next to the gas ballast valve with an
open-ended wrench (w/f 17).
➨
Turn the fitting (L) with an open-ended
wrench (w/f 14) to detach the hose from the
pump head (1/4 of a turn at maximum).
+
Do not remove the elbow fitting from the
pump head; during reassembly a leak may
result.
➨
Loosen the screw affixing the handle (use 5
mm wide Allen key) at one housing cover.
Disassembling the housing cover at the side of the emis-
sion condenser
➨
Lay the pumping unit on its side with the
pump heads to be maintained at the top.
Support the pumping unit appropriately.
➨
Disassemble the housing cover (A) to check
the valves (B).
➨
Unscrew six Allen screws with a 4mm wide
Allen key. Remove the housing cover with
housing cover insert (A) together with head
covers (C) and valves (B).
+
Never use a pointed or sharp-edged tool to
remove parts (e.g., screwdriver). We recom-
mend using a rubber mallet or compressed
air (to be blown carefully into port).
