Baseline-systems BHM Series Hydrometer Manuel d'utilisateur télécharger pdf (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 ow 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 ow tube (41).

• Inspect and replace as necessary.

• Inspect the upper and lower ow 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 ow tube o-ring (40) onto the ow tube (41).

• Place the upper ow tube o-ring into the valve seat base (45).

• Replace the ow tube (41) atop the inlet spider assembly (38) in the

hydrometer body.

• Replace the impeller assembly (43) into the ow 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 ow 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).

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Baseline-systems BHM Series Hydrometer Manuel d'utilisateur Page 34