Pump Maintenance - IMO CIRCOR BK6DHZ(C)-250 Product Service Manual

H. PUMP MAINTENANCE
Failure to observe precautions while installing, inspecting and maintaining pump can
cause injury to personnel from accidental handling of liquids that may harm skin or
clothing, or fire hazard risks from flammable liquids, or injury from high pressure fluid jets.
BEFORE working on equipment, make sure all power to equipment is disconnected
and locked-out.
H.1 GENERAL COMMENTS
NOTE: Part number identifiers (IDP's) contained within parenthesis such as (10) refer to
circled numbers shown on assembly drawings, figures 3 through 6 and Table 2.
H.2 TOOLS REQUIRED
Procedures described in this manual require common mechanics hand tools, a torque
wrench, dial indicator and suitable lifting device (such as) slings, straps, etc.
H.3 DISASSEMBLY PROCEDURES – Use correct assembly drawing pertaining to your
pump size and whether pump is a C-face or foot mount type.
SPECIAL NOTE:
Steps 1, 6, 7 8 and 9 and H.4, Steps 6, 7, 8, and 9 ONLY.
Fluid leakage from disassembly of pump may make floor slippery and cause personal injury.
1. Close suction and discharge piping to pump and remove pipe plug (67) to drain unit.
Remove seal piping (71). Remove pump from driver, coupling and base plate. Remove
coupling hub and key (31).
2. Remove bolts (4) and inlet head (2). Remove O-ring (9) from inlet head (2).
3. Remove thrust plate (29), and oil balance tube (92) with O-rings (27) by removing hex
bolts (91) and thrust spacers (90). Remove O-rings (27) from oil balance tube (92).
4. Remove cups (23) from idlers (21).
5. Remove idlers (21) by unscrewing them from inlet end of pump
Do not permit idlers (21) to drop as they emerge from housing (24).
6. Remove bolts (47) and bearing retainer (43).
7. Remove assembled power rotor (63). Removal of power rotor (63) includes removal of
Truarc rings (42), ball bearing (49), seal seat adapter (48), spacer (38) and mechanical
seal (25).
WARNING
DANGER
To service mechanical seal and ball bearing ONLY perform H.3,
CAUTION
CAUTION
6