TM 10-5410-228-24
3.9.7
NBC Fan/Motor Repair Continued.
NBC Fan.
NOTE
Remove hydraulic motor and tube assemblies per para 3.9.7.1.
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
a. Removal (Refer to Figure 3-12)
(1)
Remove two screws (21), two lockwashers (22) and two flat washers (23) securing C-face adapter
(20) to centrifugal fan (24). Discard two lockwashers (22).
(2)
Loosen set screw (16) and remove NBC motor coupling (17) and NBC fan coupling insert (25).
(3)
Loosen setscrew (26) securing NBC fan coupling (27) to centrifugal fan (24) and remove NBC fan
coupling (27).
(4)
Loosen clamp (28) securing sleeve (29) to back of centrifugal fan (24).
(5)
Loosen clamp (30) securing sleeve (31) to bottom of centrifugal fan (24).
(6)
Remove four allen screws (32), four lockwashers (33) and four flat washers (34) securing
centrifugal fan (24) to blower mount (35). Discard four lockwashers (33).
b. Installation (Refer to Figure 3-12)
(1)
Secure centrifugal fan (24) to blower mount (35) with four allen screws (32), four new
lockwashers (33) (Item 19, Appx E) and four flat washers (34).
(2)
Secure sleeve (31) to bottom of centrifugal fan (24) by tightening clamp (30).
(3)
Secure sleeve (29) to back of centrifugal fan (24) by tightening clamp (28).
(4)
Apply antiseize compound to shaft of centrifugal fan (24).
(5)
Align NBC fan coupling (27), NBC fan coupling insert (25) and NBC motor coupling (17).
(6)
Slide NBC fan coupling (27), NBC fan coupling insert (25) and NBC motor coupling (17) onto
shaft of centrifugal fan (24).
Wear gloves when working with sealers. Use in well ventilated area. Avoid prolonged contact
with skin.
(7)
Apply sealant to setscrew (26).
(8)
Secure NBC fan coupling (27) to centrifugal fan (24) by tightening setscrew (26).
(9)
Secure C-face adapter (20) to centrifugal fan (24) with two screws (21), two new lockwashers
(22) (Item 20, Appx E) and two flat washers (23).
(10) Install hydraulic motor and tube assemblies per para 3.9.7.1.
NBC Fan Components.
NOTE
Remove hydraulic motor and tube assemblies per para 3.9.7.1. Remove centrifugal fan per
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
a. Removal (Refer to Figure 3-12)
(1)
Loosen clamp (30) and remove sleeve (31) and clamp (30) from blower outlet duct (36).
