Service Kitset: WS67/16
To replace the plunger washer (#11) – Loss of suction
Unscrew the gland nut (#7) which enables the complete plunger assembly to be removed. Check that the plunger washer (#11) is soft & pliable and that it is a push fit inside the pump barrel. If it is not a push fit and/or is cracked it must be replaced. When replacing, immerse the new washer in hot water (or use a little light oil). Making sure it is the correct way up, push fit from the bottom over plunger valve body. It does cover the bottom plunger valve body hole and “floats”.
To replace the gland seal (#5) – Leaking of the gland
Having removed the complete pump assembly (as above) unscrew the plunger valve body (#12) (earlier models unscrew the plunger knob (#8). DO NOT HOLD THE PLUNGER TUBE IN ANY TOOLS AS THEY MAY CAUSE DAMAGE. When replacing or removing the gland seal onto the plunger wind it in the direction of the plunger thread so as not to damage the lip edge.
The gland nut ‘o’ ring (#6) is also included in the Service Kitset and whether replaced or not should be lubricated with a little Vaseline.
Note that both the gland nut (#7) and the spout gland nut (#14) should not be over-tightened.
Parts #5, 6, & 11 are contained in the service kitset.