EXPANSION VALVE (QUENCH) - TM-5-4120-383-140218

TM5-4120-383-14

EXPANSION VALVE (QUENCH). -Continued

5-22.

(6) Debraze two tube connections to valve. If flush bushing

is to be reused, remove it from old valve.

(7) Remove two screws, post spacers, brackets, and lock nuts.

(8) Remove valve from the unit.

Replace.

If expansion valve is suspected bad replace it.

Installation.

(1) Install flush bushing in valve.

(2) Place expansion valve in unit and align tubing ends.

(3) Protect valve from overheating during brazing operations.

Direct flame away from valve body and wrap valve body with wet rag.

(4) Braze joints in accordance with paragraph 5-13.

(5) Secure valve to housing with two each screws, post

spacers, brackets, and lock nuts.

(6) Replace dehydrator.

(7) Leak test all newly connected joints and all tube

connections in the area.

(8) Rewrap insulation at expansion valve joints.

(9) Install sensing bulb in bulb well.

Insert approximately one ounce of thermal mastic in

(a)

bulb well.

Insert sensing bulb from the expansion valve into bulb

(b)

well.

Move bulb back and forth to distribute the mastic.

(c)

Set bulb about one inch (2.5 cm) beyond open end of

(d)

bulb well.

(10) Install top rear cover (para 4-11).

(11) Evacuate and charge the refrigeration system in

accordance with paragraphs 5-15 and 5-16.

5-52