TM 5-4310-335-14
CAUTION
Hold unit in 30 degree vertical position with safety outlet up.
(11) Relieve the inlet pressure; the drain will discharge air when the inlet pressure has decayed.
Examine the tested unit; there shall be no indication of permanent deformation.
(12) Check the moisture separator for leak- age by applying 3000 psi (210.90 kgs per sq cm) pressure
to the inlet port and 40 psig (2.8120 kgs sq cm) - 50 psig (3.5150 kgs per sq cm) oil pressure to
the sensing port of the cylinder. Air leakage shall not exceed 3 cc per minute at the dump port, 3
cc per hour at other points. There shall be no oil leakage.
(13) Complete the reassembly of the unit by removing the test plug and adapter. Install safety disc
retainer (5), safety disc (4), safety disc ring (3) and safety plug (2). Torque the plug to 1200 inch-
pounds (13.82 kg-m). Retorque after 24 hours. Install cap tape (1) around the safety plug
outlets.
(14) Reassemble the electrical components 31, 28 through 30. Prior to soldering wires slip protective
tubing over the leads. Back pot the electrical connections with potting compound. Use a
compound composed of litharge and glycerine to fill the cavity at the wire end of the heater, and
at the mounting block.
(15) Test the electrical circuit of the moisture separator by checking the electrical continuity between
the two pins of the electrical connector with the unit at room temperature. An open circuit shall
be indicated.
(16) Using a 500 volt dc megger, check the resistance between either connector pin and the body.
Resistance shall be 50 megohms minimum. Apply a potential of 800 volts rms at 60 cps between
pins shorted together and case grounded. Raise gradually in 10 seconds, maintain for one minute
and gradually reduce to zero in 20 seconds. Leakage current shall not exceed 500 micro-
amperes.
(17) Lower the temperature of the unit to 35 . (1.67 ). Again check the electrical continuity
F
C
between the two pins. The -resistance shall be 8-12 ohms. Slowly increase the temperature of
the unit. The circuit must be open before the unit reaches 84 (28-80 ).
F
C
6-4. Sphere Assembly
a. Disassembly.
(1) Sphere Assembly Components
(b) Remove bottle fitting (3) and gasket (4) leaving sphere (5).
(2) Sphere Relief Valve.
(a) Remove cap seal (1, fig. 6-8), cap (2), helical spring (3), spring retainer (4), ball (5), relief
valve piston (6), backup retainer (7), preformed packing (8) and relief nut (9).
(b) Remove adapter (10), preformed packing (11), helical spring (12) and seat (13) leaving
relief valve body (14).
WARNING
Dry cleaning solvent, P-D-680, used to clean parts is potentially dangerous to
personnel and property. Do not use near open flame or excessive heat. Flash
point of solvent is 100 . - 138 . (38 to 59 ).
F
F
C
C
b. Cleaning. Clean all metallic parts of the sphere assembly using cleaning solvent, Fed. Spec. P-D-680
and dry thoroughly using filtered compressed air.
c. Inspection.
(1) Inspect metal parts for dents, scratches, breaks, cracks, pitting or other damage.
(2) Inspect preformed packing, gasket and seal for deterioration.
(3) Repair any damage or replace parts which obstruct moving parts or could cause damage to the
equipment.
d. Repair.
(1) Replace threaded parts if thread damaged.
(2) Replace preformed packing, gaskets and seal.
(3) Replace other damaged or defective parts as necessary.
e. Assembly.
(1) Sphere Assembly Components.
(a) Assemble the sphere in the reverse order of disassembly, observing the following
precautions.
bleeder (1), before assembling the sphere. Torque the plug to 375 inch-pounds (4.3288 kg-
m).
(c) Test the reassembled sphere as follows:
1. Plug the ports of the fitting and apply a pressure of 3000 psi (210.93 kgs per sq cm).
6-14
