AC International 8200 Series Service Instructions, Disassembly And Reassembly Procedures

SERVICE INSTRUCTIONS

DISASSEMBLY AND REASSEMBLY PROCEDURES

The procedures outlined in this section cover the dismantling and reassembly of the 8200 Series Centrifugal Fire Pumps.

When working on the pump, use accepted mechanical practices to avoid unnecessary damage to parts. Check clearances and conditions of parts when pump is dismantled and replace if necessary. Steps should usually be taken to restore impeller and casing ring clearance when it exceeds three times the original clearance.

DISMANTLING (PUMP WITH PACKING)

WARNING: Unexpected Startup Hazard

Disconnect and lockout power before servicing. Failure to follow these instructions could result in serious personal injury or death, or property damage.

WARNING: Electrical Shock Hazard

Electrical connections to be made by a qualified electrician in accordance with all applicable codes, ordinances, and good practices. Failure to follow these instructions could result in serious personal injury or death, or property damage.

WARNING:

Prior to working on pump the power source should be disconnected with lockout provisions so power cannot be re-energized to the motor. Close isolating suction and discharge valves. Failure to follow these instructions could result in property damage, severe personal injury, or death.

CAUTION: Extreme Temperature Hazard

Allow pump temperatures to reach acceptable levels before proceeding. Open drain valve, do not proceed until liquid stops coming out of drain valve. If liquid does not stop flowing from drain valve, isolation valves are not sealing and should be repaired before proceeding. After liquid stops flowing from drain valve, leave valve open and continue. Remove the drain plug located on the bottom of the pump housing. Do not reinstall plug or close drain valve until reassembly is completed. Failure to follow these instructions could result in property damage and/or moderate personal injury.

1.Drain pump by opening vent plug (2-910- 9) and removing drain plugs (2-910-9) on

suction and discharge nozzle. (See Exploded View on page 31).

2.Remove coupling guard and separate the coupling to disconnect the pump form the driver.

3.Remove seal lines (1-952-0).

4.Remove gland bolts (1-904-9), washers (1- 909-9), and gland (1-014-9) from each stuffing box.

5.Remove all casing main joint cap screws (2-904-1) and dowels (2-916-0). Use slot in casing main joint and separate the casing halves with a pry bar. Lift upper half casing (2-001-7) by castlugs.

NOTE: Casings have jacking screws.

6.Remove packing (1-924-9) and seal cage (1-013-9) from each stuffing box.

7.Remove cap screws (3-904-9) which hold bearing housings (3-025-3) to the casing and lift rotating element out of lower casing (2-001-8). Rotating element may now be moved to suitable working location.

8.Pull coupling half and key (3-911-2) off shaft (3-007-0).

NOTE: A spare rotating element can be installed at this point.

9.Remove cap screws (5-904-9) from bearing covers (5-018-0).

10.Remove bearing housings (3-025-3), locknut (3-516-4), and lockwasher (3-517- 4). Mount bearing puller and remove bearings (3-026-2). Remove retaining collar and split ring on outboard side and snap ring on inboard side.

CAUTION:

DO NOT REUSE THE BALL BEARINGS. Failure to follow these instructions could result in injury or property damage.

NOTE: Locknut and lockwasher are not used on inboard end bearing.

11.Remove bearing covers (5-018-0) and push oil seals (3-177-9) out of bearing covers. Pull deflectors (3-136-9) off shaft. Slide stuff box bushings (6-008-0) off of shaft.

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