M&C TechGroup CSS-M Operator's manual - Manual (Page 17)

4-2.1.3-ME Gas sampling and gas conditioning technology 17
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Figure 6 Replacement of the pump hose
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Disconnect the portable gas conditioning system from the mains voltage;
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Loosen the hose connections on the pump;
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Press the moving strap  on the recessed grips and turn the S-bar  clockwise as far as the
limit stop;

Take out the moving strap  and pull the old pump hose  on the hose nozzles out of the
guides;

Press the pressure rollers  and check whether there is any tension on the springs, if not,
exchange the pressure springs (see chapter 15.3.2);

Place the new pump hose  with the hose nozzles into the guides of the moving strap ;
N O T E !
Only when using the original spare pump hose, the perfect function is
guaranteed.
Never grease the pump hose.
Before
assembling the peristaltic pump, examine all parts for
contaminations and if necessary clean them.

Put he moving strap  with the new hose  completely into the dovetail guide of the pump
body; press the moving strap on the recessed grips and turn at the same time the S-bar 
anticlockwise as far as it locks into place;

Turn the pump on.
15.3.2 CHANGE OF CONTACT PULLEYS AND SPRINGS

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;