Installation Manual 3000B
Page 6 of 9
May 2012
COMPLETE SEVERE DUTY RETAIN-
ER (SDR) INSTALLATION (OPTIONAL
EQUIPMENT)
If the SDR is installed, the blade socket jam nuts & blade
socket cap screws (labeled 1 and 2 in Figure 5B, 5C) must
now be finally tightened to the recommended standard of 15
ft-lbs (lubricated) or 20 ft-lbs (dry) and the SDR cap screws
(labeled 3 in Figure 5B, 5C) must now be finally tightened to
20 ft-lbs (lubricated) or 25 ft-lbs (dry).
FINAL INSTALLATION CHECK
(IMPORTANT)
Double check and make final adjustments as necessary by
essentially going through the provisions of those paragraphs
entitled “
Blade Installation”
on page 3 through “
Complete
Severe Duty Retainer Installation”
on page 6 inclusively.
In so doing, one shall check the following setup criteria for
all blade positions:
0. Blade seated in hub socket.
1. Retainer rings fully seated in blade neck grooves and
hub socket grooves.
2. If applicable, SDR’s properly mounted into hub sockets
and onto blade necks.
3. Blade pitch set /-0.2 degrees of design value.
4. Tracking, if possible (see note above), set /-0.3
75” (3/4” max spread).
5. All (4 per blade pos) blade retainer cap screws torqued
to spec, 15 ft-lbs (lubricated) or 20 ft-lbs (dry).
6. All (4 per blade pos) blade retainer cap screws jam nuts
torqued to spec, 15 ft-lbs (lubricated) or 20 ft-lbs (dry).
7. If applicable, SDR cap screws torqued to spec, 20 ft-lbs,
(lubricated) or 25 ft-lbs (dry).
SEAL DISC INSTALLATION
Fasten seal disc to top of hub with four (4) 3/8” cap screws,
placing flat washers between seal disc and lock washer (See
Figure 8). Tighten to recommended standard of 15 ft-lb
(lubricated) or 20 ft-lb (dry).
CHECKING TIP CLEARANCE
Rotate fan in position inside fan ring or fan stack to check tip
clearance (See Figure 9). The recommended tip clearance is
between 1/2” and 1”. Check for spots where fan blade clear-
ance is not within the recommended tolerance.
Fan Diameter (ft)
Minimum
Maximum
6’ through 9’
1/4”
1/2”
>9’ through 11’
1/4”
5/8”
>11’ through 14’
1/4”
3/4”
TIP CLEARANCE
Figure 8
Figure 9
