Change Of Pump Piston Seal; Pump Valves; Valve Shuttle; Valve Rod Sealing - Wilhelmsen Ships AIRCLEAN 32 User Manual

E.3.3

Change of pump piston seal

a. Loosen the attaching bolts.
b. Pull the cylinder of the piston.
c. Check the cylinder for scratches to see if honing or a replacement is required.
d. Remove the lock pin for the front part of the piston and screw it off. Fit o-ring, pump seal and
front part of the piston.
e. Fit new slide rings.
f. Lubricate piston, seal and slide rings to ease reassemble and prevent damages at start up.
Reassemble sequence is opposite to dismantling, but note the following:
g. Tighten the attaching-bolts two and two opposite at a time. Sealing liquid should be applied to
the bolts.
E.3.4

Pump valves

The valve seats are fixed and are not removable. Proceed as follows to inspect/renew balls or springs:
a. Undo attaching bolts and pull free the pump head to gain access to the inlet valve. The outlet
reducer is fitted with sealing liquid.
b. Clean and inspect parts. Remove loose scale etc. Replace worn parts.
c. Clean threads.
d. Fit parts according to drawing.
e. Use sealing fluid on outlet reducer threads when assembling. Tighten opposite bolts to avoid
skewing.
E.3.5

Valve shuttle

a. Unscrew threads end cover, remove dampening ring and pull out the valve shuttle.
b. Dismantle, clean, inspect and replace parts as required.
c. Re-assembly is done in reversed order. Screw in and end cover till it bottoms.
E.3.6

Valve rod sealing

a. Split pump unit by pulling lock ring B (See drawing)N5.
b. Dismantle, clean, inspect and replace worn parts as required.
c. Lubricate all o-rings prior to re-assembly.
d. Re-assembly is done in reversed order.
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