0013
TM 1-4920-924-13&P
AVIATION SHOP EQUIPMENT CONTACT MAINTENANCE (AV SECM) SYSTEM MAINTENANCE
INSTRUCTIONS FOR WORKBENCH ASSEMBLY - (CONTINUED)
1.
Remove twenty countersunk screws (Figure 4, Item 1) and twenty speed nuts (Figure 4, Item 9) from
support plate (Figure 4, Item 2).
2.
Remove support plate (Figure 4, Item 2) and shims (Figure 4, Item 3).
3.
Remove forty countersunk screws (Figure 4, Item 1), forty speed nuts (Figure 4, Item 9), and ten large
gussets (Figure 4, Item 6).
4.
Remove four countersunk screws (Figure 4, Item 1), four speed nuts (Figure 4, Item 9), and two small
gussets (Figure 4, Item 8).
NOTE
Spring sheet nuts lock corner castings and aluminum rails together at every connection of
aluminum rail and corner castings. Ensure all spring sheet nuts are retained for use with
reassembly.
5.
Loosen and remove bottoms of four aluminum rails (Figure 4, Item 7, 11, 17 and 18) from four corner castings
(Figure 4, Item 12, 13, 14 and 15) and set second shelf aside.
6. Remove four aluminum rails (Figure 4, Item 7, 11, 17 and 18) from four corner castings (Figure 4, Item
5, 10, 19 and 21).
7. Loosen and separate two corner castings (Figure 4, Item 5 and 10) from aluminum rails (Figure 4, Item
16 and 22).
8. Loosen and separate two corner castings (Figure 4, Item 5 and 10) from aluminum rail (Figure 4, Item 4).
9. Loosen and separate two corner castings (Figure 4, Item 19 and 21) from aluminum rails (Figure 4, Item
16 and 22).
10. Loosen and separate two corner castings (Figure 4, Item 19 and 21) from aluminum rail (Figure 4, Item 20).
00137