Circor IMO AA3G Series, Руководство по обслуживанию

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H. PUMP MAINTENANCE
WARNING
Failure to observe precautions while installing, inspecting, and maintaining the pump can
cause injury to personnel from accidental handling, e.g.: Liquids that may harm skin or
clothing, fire hazard risks from flammable liquids, or injury from high pressure fluid jets.
DANGER
BEFORE working on equipment, be sure all power to the equipment is disconnected and
locked-out.
H-1
–
GENERAL COMMENTS
Part number identifiers (IDPs) contained in Table 2 and shown within parenthesis such as (8) refer to circled
numbers shown on the assembly drawings, Figures 3 and through 8.
NOTE: If upon disassembly, significant wear on power or idler rotors or rotor housing is found,
Imo Pump recommends replacement of entire pump.
H-2
–
TOOLS REQUIRED
Procedures described in this manual require common mechanics hand tools, an arbor press, a torque
wrench and a suitable lifting device such as a sling for smaller pumps or a strap for larger models.
H-3
–
PUMP DISASSEMBLY
CAUTION ATTENTION
Fluid leakage from disassembly of pump may make floor slippery and
cause personal injury.
The following steps are required before starting any maintenance action:
a) De-energize and lock out power to driver and tag power control box “ WARNING - Out of Service ”.
b) Close all inlet and outlet valves and tag valves “ WARNING - Out of Service ”.
c) Vent pressure from pump and drain pumping liquid.
d) Remove pipe fittings/flanges at pump inlet and outlet openings.
e) Remove bolts holding pump to its mounting.
f) Remove coupling hub and key (13) from power rotor (7) shaft and locate pump on a suitable
workbench.
g) On pumps with external relief valves, remove relief valve by removing socket head cap screws (5) and
O-ring (10.). See Figure 7.
NOTE: The 3G Series pumps incorporate highly finished precision parts that must be handled carefully to
avoid damage to critical machined surfaces. Parts removed should be tagged for identification and
their exact positions in the pump carefully noted so that new parts, or removed parts can be properly
replaced.
CAUTION ATTENTION
When removing inboard cover (4) from pump in step 1, below, DO NOT pull out the
rotors (7 & 8) since they may drop to floor and be damaged. If rotors start to come out,
hold them in place.
4