Pump Maintenance (Disassembly, Assembly) - Circor IMO BK12DHZ 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.
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
SPECIAL NOTE:
1, 6, 7,8 and 9 and H.4, Steps 8, 9, 10 and 11 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 tube (92).
4. Remove cups (23) from suction idlers (21).
5. Remove suction idlers (21) by unscrewing them from inlet end of pump. Remove remaining
idlers (35) from housings (73, 24) by rotating power rotor (63) in a counter-clockwise direction.
Do not permit idlers (21, 93, and 35) to drop as they emerge from housings (73, 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
To service mechanical seal and ball bearings ONLY perform H.3, Steps
CAUTION
DANGER
CAUTION
6