Watson-Marlow 501RLA User Manual page 33

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Gently withdraw pumphead guard from the other side
2
1
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Fit new pumphead guard in the reverse order. Ensure the hinge screws (2) go back through
holes in the tube clamp. Hinge screws (1) do not share holes with the tube clamp.
Reattach the earth bond to the new guard using a Phillips screwdriver.
It is imperative that the 501RLA pumpheads are earthed by
connecting the earth terminal on the track (circled in the photograph
above) to earth (usually via a suitable point on the pump drive)
31 PB0346:m-501atex-en-03