Baseline Systems BHM Series Hydrometer - Manual (Page 37)

Hydrometers Operation and Maintenance Manual •
37
Maintenance 8” Model, Cont.
STEM SUB-ASSEMBLY AND VALVE COVER
Follow this procedure only if it is necessary to replace the stem
bearings or the valve cover. Otherwise, skip this section:
Dis-assembly and Re-assembly
• Inspect the upper stem bearing wiper (36). Replace as necessary.
• Remove the upper stem bearing (37) from the stem (41).
• Inspect the upper stem bearing o-rings (38,39). Replace as
necessary.
• Unscrew and remove the stem locking nut (48), located at the
bottom of the stem subassembly.
• Remove the valve cover (47) from the stem. Inspect the rubber for
cracks and excessive wear. Replace as necessary.
• Inspect the valve cover o-ring (43) and replace as necessary.
• Remove the retaining ring (46) that holds the lower stem bearing
wiper (45) in place. Inspect the lower stem bearing wiper (45) and
replace as necessary.
• Inspect the lower stem bearing o-ring (44) and replace as
necessary.
• Inspect the lower stem bearing (42) for scratches or wear. Replace
as necessary.
• Apply Loctite 270 or similar glue to the threads of the lower stem
bearing and screw it into the stem assembly (41).
• Replace the valve cover (47) onto the stem assembly.
• Apply Loctite 270 or similar glue to the threads of the stem
locking nut (48) and screw into the stem assembly.
• Push the upper stem bearing (37) onto the stem assembly.