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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
15
SECTION FOUR A: RDC REPAIR / MAINTENANCE / OVERHAUL
Regulator Overhaul
1. Do not use silicone or Christo Lube, on
threaded high, or low-pressure inlet outlet
fittings. Use Christo Lube MCG 121 on O-
rings, on the bearing (13) and (12), and on
threads between items (16) and (17), and
between (1) and (18).
2. The regulator internal components, can be
overhauled, with the bottom end of the
regulator in place. The regulator bottom, need
not, be removed from the system.
3. Remove the regulator adjustment knob (15)
and stem (16), as an assembly.
Figure 2
4. Apply several wraps of electrician’s tape or
equivalent, around the upper housing (18) to
prevent scratching, then using a “clean
dedicated” oil filter wrench, to loosen the
upper body (18), then remove by hand.
Figure 3
Figure 4
5. Remove items (14), (12), (13), (10), (11), as a
stack, place these items in a small, clean
container.
Figure 5
6. Carefully remove the piston housing, clean
and inspect all components. Lightly lubricate
new O-rings on new service kit. Figure 6.
NOTICE
The above items are outside of the breathing
air system. If the items show no signs of dirt
and corrosion, cleaning is not required. If in
doubt, clean and re-lubricate with Christo lube,
or food grade Silicone grease.
NOTICE
Aqua Environments regulators made after 2015
have a small hole on each side of the regulator
body, to allow for using a spanner wrench
instead of an oil filter wrench.
