4-5 PUMP ASSEMBLY SHAFT INSPECT/TEST/REPLACE (CONT).
Assemble the second and third stage impeller as follows:
Position shaft sleeve (1) on shaft (2), insert key (3), and secure with four set screws (4).
Position seal bushing (5) on shaft (2) and insert pin (6).
Heat impeller wear ring (7) to a temperature of approximately 662°F (3500C). Install wear ring (7) onto impeller
(8) and secure with set screws (9).
Install casing wear ring (10) and secure with pins (11).
Split rings must be adjusted. Allow 0.039 inch (1 mm) machining allowance.
Install third stage impeller (8) and secure with key (12) and split ring (13). Adjust split rings as required.