Baseline Systems BHM Series Hydrometer - Manual (Page 34)

34
• Hydrometers Operation and Maintenance Manual
Maintenance 6” Models, Cont.
IMPELLAR AND FLOW TUBE SUB-ASSEMBLIES
Dis-assembly
• Remove valve seat base (45) from atop the flow tube (41). Be careful not
to damage the impeller shaft. Inspect for excessive wear and replace as
necessary.
• Remove the impeller assembly (43). Inspect for cracks or excessive
wear and check that the impeller shaft is perfectly straight. Replace if
necessary.
• Remove the flow tube (41).
• Inspect and replace as necessary.
• Inspect the upper and lower flow tube o-rings (40) and replace as
necessary.
• Remove the inlet spider assembly (38). Inspect and repair as necessary.
Re-assembly
• Replace the inlet spider assembly (38) into the hydrometer body.
• Place the lower flow tube o-ring (40) onto the flow tube (41).
• Place the upper flow tube o-ring into the valve seat base (45).
• Replace the flow tube (41) atop the inlet spider assembly (38) in the
hydrometer body.
• Replace the impeller assembly (43) into the flow tube (41) so that the
impeller shaft rests in the lower bearing bushing (39).
• Place the valve seat base (45) over the impeller shaft so that it rests atop
the flow tube (41).
INLET SPIDER
Dis-assembly
• Unscrew and remove the cap (35). Inspect and replace as necessary.
• Remove the lock nut (36).
• Unscrew and remove the lower bearing screw (37) from the inlet spider
(38). Inspect and replace as necessary.
• Inspect the inlet spider (38) and the lower bearing bushing (39) and
replace as necessary.
Re-assembly
• Screw the lower bearing bushing (37) back into the inlet spider (38).
• Replace the lower bearing screw (37) into bottom of the inlet spider.
Tighten approximately eight turns.
• Replace the lock nut (36) and the spider cap (35).