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ASSEMBLY - TM-55-1925-292-14-P0302
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TM-55-1925-292-14-P Firefighting Fire Alarm and Fire Suppression Systems Inland and Coastal Large TUG (LT) Manual
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Figure 4. Impeller Installation
TM 55-1925-292-14&P
0037 00
! CAUTION
Never apply pressure to the outer race of the bearings as this exerts excess load on the
balls and causes damage to the bearing.
6. Press the outboard bearing (figure 1, item 31) onto the shaft (figure 1, item 11) using an arbor press. Press
the outboard bearing up to the shoulder of the shaft. Refer to figure 3. Lubricate the outboard bearing using
lubricating oil.
NOTE
Ensure that the tangs of the lockwasher are bent into the locknut after completing the
torque for the locknut.
7. Install a new bearing lockwasher (figure 1, item 30) and bearing locknut (figure 1, item 29) on the shaft
(figure 1, item 11). Torque the locknut to 70 lb-ft (95 Nm).
8. Install a new outboard oil seal (figure 1, item 28) in the bearing carrier (figure 1, item 22).
9. Install two new O-rings (figure 1, item 27) on the bearing carrier (figure 1, item 22).
10. Install the bearing housing clamp ring (figure 1, item 26) on the shaft (figure 1, item 11).
11. Install the bearing carrier (figure 1, item 22) on the shaft (figure 1, item 11) and secure the bearing housing
clamp ring (figure 1, item 26) to the bearing carrier using the four cap screws (figure 1, item 25).
12. Lubricate the bearing carrier assembly (figure 1, item 23) with lubricating oil and install it in the bearing
housing (figure 1, item 5).
NOTE
The setscrews on the bearing carrier will be tightened after installing the impeller and
setting the impeller clearance.
13. Using a spanner wrench, secure the bearing carrier assembly (figure 1, item 23) to the bearing housing
(figure 1, item 5). Do not tighten the three setscrews (figure 1, item 21) at this time.
14. Install the brass shaft guide tool from the Durco tool kit on the shaft (figure 1, item 11).
15. Install the inboard deflector (figure 1, item 32) on the shaft (figure 1, item 11).
16. Install the mechanical seal gland (figure 1, item 16) onto the shaft (figure 1, item 11).
17. Install the mechanical seal (figure 1, item 20) on the shaft (figure 1, item 11). Do not tighten the setscrew
(figure 1, item 19) at this time.
18. Remove the shaft guide tool from the shaft (figure 1, item 11).
19. Verify that the guide bolts used during step 17 of Disassembly are installed in the rear cover plate (figure 1,
item 17).
20. Install the rear cover plate (figure 1, item 17) in the bearing housing adapter (figure 1, item 8).
21. Remove one of the guide bolts and install one of the rear cover cap screws (figure 1, item 18). Tighten the
cap screw to 40 lb-ft (54 Nm).
0037 00-7

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