HELiOS Portables Technical Service Manual • PN 20562190 Rev E
45
HELiOS P
or
tables
Troubleshooting & Repair Procedures
XI
7. To replace, reverse steps 1-6.
RP17A – QDV Assembly R/R (H300)
1. Remove the case (RP4).
2. Use an adjustable wrench to hold the fill connector mount-
ing bracket stationary. Use a second 9/16 inch open-end
wrench to remove the fill on the machined flats of the fill
connector body to loosen and remove the compression nut
of the fill tube from the top of the fill connector.
3. Use a 7/16 inch open-end wrench to hold the fill tube con-
tainer fitting stationary. Use a 9/16 inch open-end wrench
to remove the fill tube lower compression nut from the cryo-
genic container.
4. Remove the fill tube.
5. Use an adjustable wrench to hold the fill connector mount-
ing bracket stationary. Use a 7/8 inch open-end wrench to
remove the jam nut from the fill connector assembly.
6. Remove the QDV from the mounting bracket.
NOTE: Use a torque wrench to tighten the fill connector to a
torque of 35 lb/ft (511 n/m) and the jam nut to a torque of 20
lb/ft (292N-m).
Figure 40:
H300 QDV Removal
Figure 41:
H300 Fill Tube Removal
Figure 42:
H300 QDV Assembly Removal
NOTE: Position the fill tube so that the ferrules on each end are
seated in their fittings on the fill connector and the container.
Alternately hand tighten the fill tube nuts to seat the ferrules
evenly. Use two wrenches to tighten the nuts securely.
NOTE: The internal threads in the fill connector jam nut do not
run completely through the nut. Install the fill connector jam
nut with the unthreaded end toward the mounting bracket.
