M&C TechGroup CSS-VC2 Operator's manual - Manual (Page 47)

14.1a ME Gas sampling and gas conditioning technology 47
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Figure 20 Replacing the pump hose
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Unplug gas conditioning unit from the mains;
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Remove hose connections on the pump;
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Squeeze belt using the handles and turn the S-latch clockwise until it stops;
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Remove the belt and pull the old pump tubing on the slip fittings out of the guides;
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Squeeze the pressure rollers and see if spring tension exists; if not, change pressure springs
(see Section Fehler! Verweisquelle konnte nicht gefunden werden.);
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Insert new pump hosewith slip fittings into the guides  of the belt;
W A R N I N G !
Only the use of original spare pump hose ensures proper
function.
Never lubricate the pump hose.
Check all parts for dirt before assembling the hose pump and
clean if necessary.
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Insert belt complete with the new hose into the dovetail of the pump body; Squeeze the belt
at the handles and simultaneously turn the S-latch  counter clockwise until it clicks;
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Switch pump on.
18.3.2 CHANGE OF CONTACT PULLEYS AND SPRINGS
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Switch off the mains;
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Unscrew nuts of the pump head (wrench size 5,5)  and remove snap ring  from motor
shaft;