4-13. Gate Valve.
This task covers:
Wrench, 1 5/8 in., contained in Section III, item 3,
Inspected, paragraph 2-3.
Disconnected and removed from fuel system.
General Mechanics Tool Kit, Section III, Item 2,
Sealing Compound, Item 3, Appendix E
a. Replace. Replace an unserviceable gate valve with a new item from stock.
b. Repair. Repair a serviceable valve by replacing any defective part or by packing as follows:
(1) Replacement of gaskets (figure 4-2). Perform the following steps to replace gaskets:
(a) Remove nuts (1), Iockwashers (2), flat washers (3), capscrews (4) and flanged couplings (5 and 6).
Remove gasket (7) from female coupling (5) and discard.
(b) Remove cork gaskets (8) from valve body and discard. Remove old sealing compound from flanges
on valve body and couplings.
(c) Install new cork gaskets using sealing compound (MIL-S-7916).
(d) Attach couplings (5 and 6) to valve using capscrews (4), flat washers (3), Iockwashers (2) and
nuts (1). Install new gasket (7) in female coupling.
(2) Replacement of packing (figure 4-2). Perform the following steps to replace the packing.
(a) Remove the wheel nut (9) and handwheel (10).
(b) Remove stuff nut (11) and spring (12).
(c) Remove nuts (13), Iockwashers (14), capscrews (15) and the bonnet (16) from body and valve stem
(d) Remove gasket (17) from the valve body (18). Discard gasket. Remove old sealing compound from
bonnet and valve body.
(e) Remove the packing gland (19) and packing (20) from the bonnet (16). Discard packing.
(f) Install new gasket (17) using sealing compound (MIL-S-7916).