TM 55-1930-209-14&P-3
b.
Disassembly.
(1)
Remove O-ring, rubber grommet, metallic clip, and line nut.
(2)
Remove O-ring, rubber grommet, metallic clip, and line nut from other end Discard metallic dips.
c
Assembly.
NOTE.
If tube is to be replaced, measure length of old tube and cut new tube to same length.
(1)
Install two line nuts with threads facing ends of tube.
(2)
Install two metallic clips.
(3)
Install two rubber grommets with beveled side facing metallic clip.
(4)
Install two O-rings.
d
Installation.
(1)
Install tube.
(2)
Tighten line nuts.
4-8.7 RO block pressure tube seals replacement. Pressure tube and caps must be removed to replace pressure tube
seals Proceed as follows:
a
Removal.
(1)
Tag all rigid and flexible tubes at the product water end of the RO block assembly Loosen rigid tube
nut.
(2)
Loosen rigid tube nut at high pressure manifold DO NOT remove Swing tube away from end cap
assembly.
(3)
Loosen flexible tube nut. Remove flexible tube from end cap.
(4)
Remove two bolts, two nuts, and two end damp halves.
(5)
Gently work end cap assembly back and forth to remove from pressure tube Use care to avoid
damaging seals. Set aside In a clean place Go to other (feedwater) end of pressure tube.
(6)
Tag all rigid tubes at feedwater end of the pressure tubes Loosen rigid tube nut.
(7)
Loosen rigid tube nut at manifold. DO NOT remove Remove rigid tube from end cap assembly Swing
tube away from end cap assembly.
(8)
Remove two bolts, two nuts, and two end damp halves.
(9)
Gently work end cap assembly back and forth to remove from pressure tube Use care to avoid
damaging seals Set aside in a clean place.
b
Replacement. Inspect pressure tube seals on end cap assembly Replace if damaged.
c.
Reinstallation.
(1)
At brine (concentrate) discharge end of pressure tube, wash end cap assembly with a cloth and clean
water.
(2)
Lightly coat outside of end cap assembly O-ring with silicone lubricant Align end cap assembly with.
inboard end connector.
(3)
Rotate end cap assembly to align with rigid tube Gently push end cap assembly onto inboard end
connector in pressure tube Use care to seat O-ring seal properly and avoid pinching seal.
(4)
Swing rigid tube back over end cap assembly Install tube on end cap assembly and tighten rigid tube
nut.
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