TM 5-4310-335-14
(c) Torque inlet body (2) onto outlet body.
(7) to 150 inch-pounds (1.7288 kg-m).
(d) Test the reassembled valve as follows:
WARNING
Exercise extreme care when working with high pressure air to prevent injury to personnel or damage
to equipment. Do not attempt to tighten any fitting or perform any work on equipment when the
system is under pressure. Do not tamper with any pressure relief valves.
1. Cap the outlet and apply 4500 psi (316.35 kg per sq cm) proof pressure to the inlet for 15 seconds. There shall
be no failure or leakage.
2. Apply 5 psi (0.3515 kgs per sq cm) air pressure to valve outlet and immerse inlet in water. Leakage rate from
inlet shall not exceed 1 cc per hour.
3. Apply 3000 psi (210.90 kgs per sq cm) air pressure to valve outlet and immerse inlet in water. Leakage rate
shall not exceed 3 cc per hour.
4. Check for free passage of air to valve inlet. Valve shall crack between 2 psi (.1406 kgs per sq cm) and 8 (.5624
kgs per sq cm) psi. 5. Blow valve dry after test and lockwire .
(3) Timer Box Assembly. (fig. 6-11).
(a) Assemble the timer box in the reverse order of disassembly.
(b) Apply locquic primer and Loctite sealant, MIL-S-22473D to set screws (35 and 37) and to jam nut of flexible
shaft (5).
(c) Ensure that the width of cam (38) is centralized with the lever of control valve (14) within 0.040 inch (.1016 cm).
Gear (36) shall be aligned with gear of gear and cam (38) within 0.040 inch, (.1016 cm). Apply grease, MI-G21164C to
gear teeth and the OD of the can.
(d) Add washers (40) as necessary under the heads of screws (41) to maintain clearance between the screw ends
and cam (38).
(e) Set the timer box valve position as follows:
NOTE
Ensure that the lever arm of the control valve (14) does not engage the slot of cam (38)
1. Loosen the two nuts holding the control valve and pivot the valve towards the cam to maximum inward position.
2. Using the test setup shown in fig. 6-13, set 100 psi (7.03 kgs per sq cm) on gage G1 by throttling the oil supply
valve. This will supply 100 psi (7.03 kgs per sq cm) through the control valve to gage G2.
3. Rotate the control valve about the pivot screw A, to move the valve body away from the cam. Observe the point
at which the reading on gage G2 drops to zero. From this exact point, pivot the valve 0.030 inch (.0762 cm) (measured at
pivot screw A) toward the cam and tighten both screws securely.
(4) Unloader Valve Assembly. (fig. 6-12).
(a) Coat preformed packing (4) and the OD threads of plug (2) with grease MIL-G4343B and install on plunger (5)
with cap seal (3).
(b) If cap (22) or body (23) had been replaced, apply Loctite primer MIL-S-22473D and Loctite to the OD threads
before installing the cap into the body. Screw cap in until bottom of cap is 3.53 inches (8.9662 cm) from bottom of body.
Circular stake in four places equally spaced within +0.010 inch (.0254 cm).
(c) Insert spring (8), retainer (7) and the plunger assembly into the body. Screw plug (2) into the body until the top
of the plug is 0.82 inch (.2828 cm)-0.88 inch (2.2352 cm) from the top of the body. See fig. 6-14, Dimension A.
(d) Slowly apply 3175 psi (223.20 kgs per sq cm)-3225 psi (226:72 per sq cm) pressure to the port on plug (2, fig.
(e) Measure the distance from the top of the boss on body (23) to the shoulder on plunger (5). See figure 6-14,
Dimension B.
(f) Subtract 0.050 inch (.1270 cm) from measurement B to obtain the required thickness of shim (6, fig. 6-12).
(g) Insert required shim (6) onto plunger assembly.
(h) Screw on bracket (16), jam nut (21) and stop nut (20) onto cap (22).
(i) Install actuator knob (19) onto the lever of control valve (15) and rest on the alignment screw.
(j) Determine the thickness of shim (14), and assemble the control valve to the bracket with screws (12), washers
(13), shims (14), lockwashers (10) and nuts (9).
(k) Secure the actuator knob to the valve with setscrew (18). Apply Loctite and Locquic primer MIL-S-22473D to
the screw before installing. Remove alignment screw.
(l) With the actuating lever in the DOWN position, screw down bracket (16) until the valve
6-21
