Pressure Relief Valve - TM-5-4120-356-140130

TM 5-4120-356-14

(d) Check the pressure regulator valve and the dehydrator for leaks

i n accordance with the procedures given in paragraph 4-4c. Repair any leaks found in

a c c o r d a n c e with paragraph 4-4d.

(e) Refer to figure 4-4 and evacuate the refrigerant system.

(f) Charge the system with refrigerant in accordance with the pro-

cedures given in paragraph 4-10.

P r e s s u r e Relief Valve

( 1 ) I ns p e c t i o n .

(a) Refer to figure 3-12 and partially remove the junction box.

(b) Refer to figure 3-22 and remove the RFI filter panel to provide

access to the pressure relief valve.

ternally for obvious defects and/or damage which would impair serviceability.

( 2 ) R e p l a c e . I f damage or defects are found w h i c h would impair service

a b i l i t y o f t h e p r e s s u r e r e l i e f v a l v e . r e p l a c e t h e v a l v e . R e f e r to steps (3) and (4)

f o r removal of defective valve and installation of a new v a l v e .

( 3 ) Removal.

( a ) R e f e r t o f i g u r e 4 - 2 a n d r e l e a s e r e f r i g e r a n t from the system.

( b ) Refer to figure 4-12 and remove t h e p r e s s u r e r e l i e f v a l v e .

(4) Installation.

CAUTION

U s e care in applying leak lock to the

t h r e a d s of the pressure relief valve

s o that none of the material gets in-

s i d e the refrigerant system when the

valve is installed.

( a ) Apply leak lock (NSN 8030-00-999-6313) or equivalent, to the

threads of the pressure relief valve.

(b) Install the pressure relief valve by screwing it into the fitt-

i n g at the base of the dehydrator.

( c ) Perform any further maintenance of refrigerant system compments

which may be required.

( d ) P u r g e t h e refrigerant system in accordance with the procedures

C h e c k t h e pressure r e l i e f v a l v e a n d t h e d e h y d r a t o r f o r l e a k s i n

(e)