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This Guide is made available for the express use of owners and users of the Dive Lab XLDS systems.
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Document XLDS Guide – Section Four A
Revised September 30, 2019
20
SECTION FOUR A: RDC REPAIR / MAINTENANCE / OVERHAUL
11. Clean and inspect the ball (5), stem (4), stem
cap (7) and center body section (1). If the
Ball (5), center section (1) or stem (4) shows
signs of damage from scratching, pitting,
corrosion or wear, replace the complete
center section.
12. Apply a light coat of Christo Lube
on the
exterior of the new packing, and insert the
packing into the valve center body (1).
13. Lightly lubricate the stem shaft, and install
the Teflon
stem washer (3), then slide the
valve stem (4), up into the new packing (2),
from inside the valve center body (1). Make
sure it is pressed all the way up, into place.
Figure 27
14. Install the stem cap (7), hand tight only.
15. Install the ball (5), so the groove is centered
with the stem, then lightly lubricate the white
plastic ball seals (6), and install with the
concave sides in, against the ball. Ensure the
plastic seals are properly seated.
Figure 28
16. If the valve is an umbilical outlet valve ALP-
1R, ALP-2G, ALP-3Y, apply a drop of thread
medium or low setting thread locking
compound to each bolt, at the start of the
thread, then install the lock-washers and
bolts (25, 27), and slowly draw up, evenly
tighten in an X pattern into the end of the
manifold, in three steps 10 inch lbs., 30 inch
lbs., and finally torque to 60 inch lbs.
Install the lock nuts (10), lightly tighten using
an X pattern 180˚aparting, then torque to 60
inch lbs.
17. Torque stem cap (7) to 60 inch lbs., operate
the stem with the handle several times, to
ensure smooth operation, then re-torque to
60 inch lbs.
Figure 29
18. Re-install the manifold in the box, making
sure each clamp block, has the rubber strip
installed. Tighten all clamp blocks to 40 inch
lbs.
19. Reinstall the pneumofathometer fitting to
each pneumo valve, and lightly tighten.
20. Perform a pressure test of the LP system.
NOTICE
If the valve was a cross connect valve, reinstall
the 4 bolts (9), so that the head of the bolt
faces green diver manifold.
