Baseline-systems BHM Series Hydrometer Instrukcja Użytkownika Pobierz pdf (Strona 33)

Hydrometers Operation and Maintenance Manual • 33

Maintenance 6” Models, Cont.

DIAPHRAGM AND UPPER STEM BEARING

Dis-assembly

• Unscrew and remove the 12 screws (17) and remove the upper

diaphragm ring (18).

• Remove the diaphragm (19).

• Inspect for cracks or excessive wear and replace as necessary.

• Inspect the upper stem wiper (20) and replace as necessary.

• Remove the upper stem bearing (21) from inside the stem

(24). Inspect the upper stem bearing (21) along with the upper

stem bearing o-ring (22) and the stem o-ring (15). Replace as

necessary.

Re-assembly

• Replace the upper stem wiper (20) onto the upper stem bearing

(21)

• Replace the upper stem bearing (21) into the stem (24).

• Place the diaphragm (19) into the grooves on the stem (24).

• Place the upper diaphragm ring (18) over the diaphragm and

screw the 12 stem screws (17) into place.

LOWER STEM BEARING AND VALVE COVER

Dis-assembly

• Unscrew and remove the stem lock nut (29).

• Pull the valve cover (28) from the stem. Inspect the rubber for

cracks or excessive wear. Replace as necessary.

• Inspect the lower valve cover o-ring (26) and replace as

necessary. It is located in a groove inside the valve cover

opening.

• Using a screwdriver, remove the lock ring (27) from inside the

bottom of the stem (24).

• Inspect the lower stem bearing wiper (20) and the lower stem

bearing o-ring (22) and replace as necessary.

• Inspect and replace the lower stem bearing (25) as necessary.

Use a pipe wrench to remove it from the stem (24).

• Apply Loctite 270 or similar glue to the threads of the lower

stem bearing (25).

• Screw it back into the stem (24).

Re-assembly

• Replace the lower stem wiper (20) into the bottom of the stem

(24).

• Snap the wiper locking ring (27) into the stem (24).

• Push the valve cover (28) onto the lower stem bearing (25).

• Apply Loctite 270 or similar glue to the threads of the stem

lock nut (29).

• Screw the stem lock nut (29) into the stem (24). Do not over

tighten. Make sure that the valve cover is free to move up and

down slightly.

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