TM 5-4220-227-14
4-31. Hoses.
This task covers:
Replace
INITIAL SETUP:
Tools
Equipment Condition
General Mechanic's Tool Kit
Chamber shut down (para. 2-15).
(NSN 5180-00-177-7033)
5-Gallon Container
Materials/Parts
Hoses (Supply and Return Line)
Ethylene Glycol (Item 10, Appendix E)
Replace. (figure 4-14)
(1)
Move heater/chiller switch (1) on the heater/chiller module (2) to OFF position and disconnect power cord (3)
from the 220 Vac electrical power source.
(2)
Close heater/chiller fluid supply valve (4) and return valve (5).
(3)
Loosen fitting nut (6) and remove heater/chiller fluid supply hose (7) from elbow fitting (8) and drain fluid into
suitable container.
(4)
Loosen fitting nut (9) and remove supply hose (7) from supply hose connection (10) on heater/chiller module (2).
(5)
Loosen fitting nut (11) and remove heater/chiller fluid return hose (12) from elbow fitting (13) and drain fluid into
suitable container.
(6)
Loosen fitting nut (14) and remove return hose (12) from return hose connection (15) on heater/chiller module
(2).
(7)
Install return hose (12) on return hose connection (15) and tighten fitting nut (14).
(8)
Install return hose (12) on elbow fitting (13) and tighten fitting nut (11).
(9)
Install supply hose (7) on supply hose connection (10) and tighten fitting nut (9).
(10)
Install supply hose (7) on elbow fitting (8) and tighten fitting nut (6).
(11)
Add ethylene glycol/water mixture 25% to 75% to reservoir (16), if necessary, to replace fluid lost during removal
procedure.
(12)
Open heater/chiller fluid supply valve (4) and return valve (5).
(13)
Connect power cord (3) on heater/chiller module (2) to 220 Vac electrical power source.
4-38
