TM 9-2320-272-24-4
5-85. BONNET FRAME PARTS REPLACEMENT (Contd)
NOTE
Left and right heater duct
assemblies are removed the same way.
This procedure covers the
right side.
6.
Remove two fasteners (5) from support
(14) and heater duct (2).
Remove four rivets (12) and two speed
nuts (13) from support (14). Discard rivets (12) and speed
7.
nuts (13).
Remove three screws (11) and support (14) from front wall (15).
8.
Remove thirty-six rivets (3), heater duct (2), and insulation (4) from bonnet floor (19). Discard
9.
rivets (3) and insulation (4).
Remove sixteen rivets (7), twenty-four rivets (8), thirty-six rivets (10), and inner panels (9) and (16)
10.
from bonnet frame (6) and bonnet floor (19). Discard rivets (7), (8), and (10).
Remove three screws (20) and post (1) from bonnet floor (19).
11.
NOTE
Assistant will help with step 12.
Remove forty-three rivets (17), thirty-five rivets (18), and bonnet floor (19) from bonnet frame (6)
12.
and front wall (15). Discard rivets (17) and (18).
NOTE
Insulate areas of dissimilar metal-to-metal contact with zinc
l
chromate primer.
Apply sealing compound to exterior joints prior to installation.
l
Insulate all enclosed structure with fibrous glass felt insulation.
l
l Assistant will help with step 1.
1.
Install bonnet floor (19) on bonnet frame (6) and front wall (15) with forty-three new rivets (17) and
thirty-five new rivets (18).
2.
Install post (1) on bonnet floor (19) with three screws (20).
3.
Install inner panels (9) and (16) on bonnet frame (6) and bonnet floor (19) with thirty-six new
rivets (10), twenty-four new rivets (8), and sixteen new rivets (7).
NOTE
Left and right heater duct assemblies are installed the same way.
This procedure covers the right side.
4.
Install new insulation (4) and heater duct (2) on bonnet floor (19) with thirty-six new rivets (3).
5.
Install support (14) on front wall (15) with three screws (11).
6.
Install two new speed nuts (13) on support (14) with four new rivets (12).
7.
Install heater duct (2) on support (14) with two fasteners (5).
5-546
