Baseline Systems BHM Series Hydrometer - Manual (Page 36)

36
• Hydrometers Operation and Maintenance Manual
Maintenance 8” Model, Cont.
DIAPHRAGM SUB-ASSEMBLY DIS-ASSEMBLY
Dis-assembly and Re-assembly
• Remove the sixteen ½” screws (21) from the upper diaphragm ring (22).
• Lift the upper diaphragm ring (22) off of the diaphragm (23).
• Lift the diaphragm (23) off of the lower diaphragm disc (25).
• Place the replacement diaphragm (23) onto the lower diaphragm disc (25).
• Place the upper diaphragm ring (22) over the diaphragm.
• Replace and tighten the ½” screws (21) into the upper diaphragm ring.
Replacement in the Body
Perform the preceding steps in the reverse order to reassemble the diaphragm
assembly.
1. Replace and tighten the four ½” screws (21) and the four 7 ∕
8
” screws (24)
into the lower diaphragm disc (25).
2. Place the diaphragm assembly over the impeller shaft onto the lower
chamber disc and stem assemblies.
LOWER CHAMBER DISC SUB-ASSEMBLY
Dis-assembly
The following steps are performed following removal of the diaphragm
sub-assembly as described on page 24.
• Remove the six 6 mm screws (33) from the top of the lower chamber disc (27).
• Remove the two lower chamber disc locking rings (26).
• Temporarily replace the diaphragm subassembly onto the lower chamber
disc (27).
• Insert and tighten the four 7 ∕
8
” screws (24) into the lower diaphragm disc
(innermost ring) on the diaphragm subassembly, temporarily re-attaching
it to the stem.
• Pull upward and lift to remove the diaphragm subassembly, together with
the lower chamber disc and stem subassemblies, from the hydrometer body.
• Remove, once again, the four 7 ∕
8
” screws (24) and pull the diaphragm
subassembly up from the stem.
• Lift the lower chamber disc (27) off of the stem (41).
• Inspect the two lower chamber o-rings (28) and (29) on outside of the
lower chamber disc (27). Replace as necessary.
• Remove the four ½” screws (21) that fasten the lower chamber ring (35)
to bottom of the lower chamber disc (27) and remove the lower chamber
ring.
• Inspect the lower chamber bearing wiper (32). Replace as necessary.
• Remove the lower chamber bearing (30) from inside the lower chamber
disc (27). Inspect and replace as necessary.
• Inspect the lower chamber bearing o-rings (31 and 34). Replace as
necessary.
Re-assembly
• Replace the lower chamber bearing (30) into the lower chamber disc.
• Replace the lower chamber bearing ring (35) onto the lower chamber
disc.
• Insert and tighten the four ½” screws (21).
• Perform the rest of the above steps in the reverse order.