ABB SCK - Page 182

182 Operating instruction SCK Gas Sampling System OI/SCK-EN Rev. E
Step
Procedure
6
Mark the head cap (1) , spacer plate (3) and housing (5) with a
felt pen. This prevents the possibility of these parts being
fitted incorrectly when the pump is reassembled later.
7
Unscrew the four head-cover screws (2) and remove the head
cap along with the spacer plate from the pump housing.
8
Move the structural diaphragm by rotating the fan impeller to
its upper return point.
9
Lift the structural diaphragm (4) holding opposite sides and
screw it out counter-clockwise. Make sure that the cup spring
(7)
and the adjusting washer(s)
(8)
do not fall off the threaded
bolt of the structural diaphragm into the housing.
10
Remove the cup spring
(7)
, adjusting washer(s)
(8)
and support
bowl
(9)
from the threaded bolt of the structural diaphragm
and store them.
11
Check all the parts for dirt and, if necessary, clean them with a
dry cloth or compressed air.
12
Push the support bowl
(9)
, the adjusting washer(s)
(8)
and the
cup spring
(7)
onto the threaded bolt of the new structural
diaphragm in this order.
Note: The cup edge of the spring must face the structural dia-
phragm!
13
Move the connecting rod (6) to its upper return point.
14
Screw the new structure diaphragm with support bowl, adjust-
ing washer(s) and cup spring onto the connecting rod and
tighten to finger tightness.
15
Reconnect pump hoses.
16
Screw pump housing back on.
17
Switch circuit breaker -F34 back on.
18
Close control cabinet again.