Watson-Marlow DuCoNite 25 - Manual (Page 33)

MAINTENANCE
33
7.7 Replacing pump hose
7.7.1 Removing pump hose
1. Isolate the pump from the electrical supply.
2. Close any shut-off valves in both the suction
and discharge line to minimize product loss.
3. Place a tray (A) under the drain plug in the
bottom of the pump head. The tray must be
large enough to contain the lubricant, possibly
contaminated with product fluid, from the pump
head. Remove the drain plug (B). Catch the
lubricant from the pump housing in the tray.
Check that the breather/vent mounted on the
rear is not obscured. Position the drain plug and
tighten it firmly.
4. Loosen the retaining bolts (A) of both the
suction and discharge line (B). Disconnect the
suction and discharge lines.
5. Loosen hose clamp (A) of both the inlet and
outlet ports by loosening retaining bolt (B).