Baseline Systems BHM Series Hydrometer - Manual (Page 23)

Hydrometers Operation and Maintenance Manual •
23
Maintenance Preparation
The hydrometer requires no routine periodic maintenance. In the unlikely event that the
hydrometer fails to operate as expected, please follow the troubleshooting procedures as outlined
on pages 20-22. If and when the troubleshooting procedures necessitate the inspection
or replacement of internal parts, use the procedures contained in this chapter to perform the
required action.
This chapter contains step-by-step instructions for the dis-assembly of the hydrometer as well as
the inspection, cleaning and replacement of its component parts.
PRELIMINARY STEPS
The following steps should be undertaken before attempting to remove the hydrometer from the
pipeline or performing any repairs:
1. Flush the pipeline to remove impurities and foreign matter.
2. Close the inlet valve in order to shut off the water flow to the pipeline.
3. Drain all water from the hydrometer.
4. Remove the reed switch from the register dial. Gently turn and pull the switch mechanism
up to release it.
5. Disconnect all control hoses from the inlet and outlet connectors.
6. Disconnect all control hoses and shuttle valves from the 3-Way Selector.
TOOLS
The following tools are required to perform these procedures:
• Flat blade and Phillips head screwdrivers in various sizes
• Socket and open end wrenches in various sizes
• Hammer
• Large pipe wrench
• Special box wrench for removal of the upper spindle bolt – Model Number: 00360-000071
• Special extractor tool for removal of the valve cover – Model Number: 00360-000072
• Teflon tape or similar sealing material
• Grease for sealing gaskets and o-rings
IMPORTANT NOTE:
Use plumbing grease. DO NOT USE petroleum base grease, it will degrade the o-rings.