Baseline-systems BHM Series Hydrometer Bedienungsanleitung PDF herunterladen (Seite 26)

26 • Hydrometers Operation and Maintenance Manual

Maintenance 1½” and 2” Models

1½” and 2” Hydrometers

The dis-assembly of the hydrometer is divided into the following assemblies:

• Cover Assembly

• Diaphragm/Stem and Base Assemblies

• Inlet Spider/Strainer Assembly

Perform only those procedures necessary to inspect and replace parts as directed by the

troubleshooting procedures. It is recommended to replace the various o-rings and gaskets

during dis-assembly as well as to inspect certain other parts. All gaskets and o-rings must

be covered with grease prior to installation.

HYDROMETER COVER AND BASE ASSEMBLIES

Removal

• Remove the register assembly as described on page 25.

• Loosen and remove the upper bearing bolt (8) using the specially

sized box wrench. Model number: 03640-000071

• Remove the upper bearing bolt o-ring (9) from the groove in the

underside of the bolt. Inspect and replace as necessary.

• Loosen and remove the six cover screws (10), with the washers.

• Lift the base and cover assemblies off of the hydrometer body (21).

• Be especially careful not to damage the impeller.

• Place the two assemblies upside down. Pull the impeller (30) up

and out.

• Some force may be required to free the impeller.

• Remove the magnet housing (31) from inside the cover assembly.

The magnet housing was freed from the impeller shaft during the

previous step.

• Inspect the impeller and its components for signs of excessive wear

or damage.

• Verify that the impeller shaft is straight. Replace as necessary.

Re-assembly

• Carefully place the base and cover assemblies over the impeller shaft

(30).

• Push the magnet housing (31) down over the top of the impeller shaft (which extends

through the hole in the cover). Tap the magnet housing with a hammer to ensure that it

is properly secured to

the shaft.

• Place the base and cover assemblies onto the hydrometer body (21).

• Replace and tighten the six cover screws (10).

• Place the upper bearing bolt o-ring (9) into the groove on the underside of the bolt (8).

• Screw in the upper bearing bolt “O” (8) using the specially sized

box wrench.

• Replace the register assembly and cover as described on page 25.

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