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B-701964-00 Rev. C
Service and Repair
5-11
Companion 1000/T Liquid Oxygen System Technical Manual
5.7.1
Removal
Refer to Figure 6-5 to identify parts with bold number references.
1. Remove side cover B (Section 5.2.1, steps 1 and 2).
2. Loosen and remove the silencer
6
from the end of the primary relief valve
5
(Figure
5-13).
Figure 5-13
3. Use a
1
/
2
-in. open-end wrench to loosen and remove the primary relief valve while
simultaneously holding the relief valve adapter
4
stationary with another
1
/
2
-in.
open-end wrench.
Figure 5-14
Some older models may not be equipped with a silencer. These units may be
retrofitted with a silencer, but this will require replacing the primary relief
valve.
•
Inspect the relief valve adapter for cracks caused from overtightening. Replace as
necessary.
•
Some older models contain a blue, anodized relief valve adapter. Some of these
adapters may be susceptible to cracking. The blue relief valve adapter has been
replaced by a clear anodized adapter that has a longer thread engagement length
(refer to parts list).
•
The primary relief circuit tubing on some older models consists of a "pig-tailed"
section of aluminum tubing. The current primary relief circuit tube is a long,
U-shaped section of aluminum tubing. (Refer to parts list and Figure 6-5.)
Summary of Contents for COMPANION 1000
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