page 108 of 121
Assembling the housing cover at the side of the emis-
sion condenser
➨
Put on housing cover (A).
+
Move housing cover slightly to ensure that the head covers are cor-
rectly positioned.
➨
Screw in the Allen head screws at the head
cover in a diagonal pattern with a 4 mm
wide Allen key, loosely at first, to align, then
tighten.
+
Maximum torque: 4.4 ft
.
lb
f
(6 Nm).
Disassembling the housing cover at the side of the ON/
OFF switch
➨
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., screw-
driver). We recommend using a rubber mallet or compressed air (to be
blown carefully into port).
➨
Remove the head cover (C) carefully from
the housing cover (A). Note position and
alignment of valves (B). Remove the valves.
+
Replace valves if necessary.
+
Use petroleum ether or other industrial sol-
vent to remove deposits. Do not inhale va-
pors.
