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TM 10-4930-250-13&P
NOTE
Assembly of the. unisex coupling on to the inlet requires two persons, one to hold the unisex
coupling on the inlet against spring pressure and one to insert the balls. Alternatively, one person
can perform the task if the unisex coupling is pressed against some object heavy enough to
compress and hold the inlet springs while the balls are inserted in the race.
(5) Place a wiping rag under the unisex coupling (3). Slide the unisex coupling (3) onto the inlet (5) and adjust position
until screw hole is facing up and ball race (rounded groove) (11) in inlet is centered under screw hole. Install balls
(4) one at a time, rotating unisex coupling (3) back and forth until all 41 balls (4) have been inserted.
(6) Install ball retaining screw (1) and 0-ring (2) in unisex coupling (3). Tighten retaining screw.
4.8.2
REPLACE THREE-INCH UNISEX COUPLING. (Refer to figure 4-3.)
This task consists of:
a. Removal
b. Installation
INITIAL
SET-UP:
Tools:
Materials/Parts Required:
Tool Kit, General Mechanics
Petrolatum (Appendix F, Section II, Item 5)
(Appendix B, Section III, Item 1)
Rag, Wiping (Appendix F, Section II, Item 7)
Chemical and Oil Protective Gloves
O-ring (Appendix I, Item 2)
(Appendix B, Section III, Item 2)
0-ring (Appendix I, Item 3)
General Safety Requirements:
Equipment Condition:
AAFARS shutdown (NORMAL SYSTEM
WARNING
SHUTDOWN, para. 2. 5. 1)
•
Fuels are toxic and flammable. Do not get on person
Component removed from system (para. 2.8)
or clothing. Do not use near open flame. Area
should be well ventilated.
•
Using dry cleaning solvents incorrectly can cause
injury or even death.
•
Fuel is flammable. Do not smoke.
a. Removal.
Rubber gloves should be worn when handling fueling system components due to the toxic effects of
some fuel additives.
(1) Remove ball retaining screw (1) and O-ring (2). Discard O-ring (2).
(2) Position a wiping rag under coupling (3) and orient coupling (3) screw hole toward wiping rag. Rotate unisex
coupling (3) back and forth to allow the 41 balls (4) to collect in the wiping rag.
4-10
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