47HARDI
®
NAVIGATOR 550M, 800M, 1000M CENTRIFUGAL OPERATOR'S MANUAL
5.6 Nozzle Tubes And Fittings
Poor seals are usually caused by;
• Missing O-rings or gaskets
• Damaged or incorrectly seated O-rings
• Dry or deformed O-rings or gaskets
• Foreign materials
Therefore, in case of leaks; DO NOT overtighten (Fig. 23). Disassemble,
check condition and position of O-ring or gasket, clean, lubricate and
reassemble.
For radial type seals (O-ring)(Fig.23) hand tighten only, do not use pli-
ers.
The O-rings need to be lubricated ALL THE WAY AROUND before fi tting
on to the nozzle tube.
Fig. 23
HARDI
®
recommends using a vegetable based oil to prolong the life of
the O-ring.
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