MS33651C
Lubricate O-ring SAE-AS568-015 with grease in accordance with SAE-AMS-G-4343 prior to installation in boss. This air valve should not be used in any boss having a diameter of less than .813 inch (20.65 mm). Boss must be clean and smooth.
CAUTION: Clean top surface or boss and insure that it is free from nicks and scratches before installing air valve. With O-ring in place, tighten 3/4 hex against top surface of boss to 100 - 110 inch- pound (11.3 - 12.4 Nm) of torque. Never loosen body assembly to discharge air.
OPERATING INSTRUCTIONS
Using gage assembly MIL-DTL-8348. a. To charge with or discharge air.
1. Remove dust cap MS20813-1.
2. Attach air filling chuck to valve by means of gage assembly.
3. Loosen 3/4 hex swivel nut to between one and two turns. Turn clockwise to tighten.
4. Charge or discharge to proper air pressure.
5. Tighten 3/4 hex swivel nut to 50 - 70 inch-pounds (5.6 - 7.9 Nm) torque. Turn counterclockwise to loosen.
6. Remove gage assembly from valve and replace and tighten dust cap (MS20813-1) to extreme finger tightness.
Without using gage assembly. a. To charge unit with air.
1. Remove dust cap MS20813-1.
2. Attach air filling chuck from booster pump, air bottle, etc., to valve stem threads.
3. Loosen 3/4 hex swivel nut to between one and two turns. Turn counterclockwise to loosen.
4. Charge to proper air pressure.
5. Tighten 3/4 hex swivel nut to 50 - 70 inch-pound (5.6 - 7.9 Nm) torque. Turn clockwise to tighten.
6. Remove air filling chuck from valve and replace and tighten dust cap (MS20813-1) to extreme finger tightness.
b. To discharge air from unit.
1. Remove dust cap MS20813-1.
2. Loosen 3/4 hex swivel nut to suite required discharge. Turn counterclockwise to loosen. If only a small amount of air is to be discharged, loosen 3/4 hex nut slightly.
3. Tighten 3/4 hex swivel nut to 50 - 70 inch-pound (5.6 - 7.9 Nm) torque. Turn clockwise to tighten.
4. Remove air filling chuck from valve and replace and tighten dust cap (MS20813-1) to extreme finger tightness.
Changes from previous issues. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.
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