General Guidelines; General Conventions - Aqua Lung S.E.A. LV-2 Technical Manual

introduction
This manual provides factory prescribed procedures for the correct
service and repair of the Aqua Lung SEA LV-2. It is not intended to be
used as an instructional manual for untrained personnel.
The procedures outlined within this manual are to be performed only by
personnel who have received Factory Authorized training through an
Aqua Lung Service & Repair Seminar. If you do not completely under-
stand all of the procedures outlined in this manual, contact Aqua Lung
to speak directly with a Technical Advisor before proceeding any further.
LV-2 has black external parts, however, chrome parts are used in this
manual for clarification.
Scheduled Service
The SEA LV-2 should be given the same care and maintenance as life
support equipment. It is therefore important to perform scheduled over-
haul service for the complete unit, according to the procedures outlined
in this manual on a regularly scheduled basis; once every two years with
normal use.

general guidelines

1. In order to correctly perform the procedures outlined in this manual,
it is important to follow each step exactly in the order given. Read over
the entire manual to become familiar with all procedures before at-
tempting to disassemble the product in this manual, and to learn which
specialty tools and replacement parts will be required. Keep the manual
open beside you for reference while performing each procedure. Do not
rely on memory.
2. All service and repair should be carried out in a work area
specifically set up and equipped for the task. Adequate lighting, cleanli-
ness, and easy access to all required tools are essential for an efficient
repair facility.
3. Before beginning any disassembly, it is important to first perform the
Initial Inspection procedure, and refer to Tables 1 & 2: Troubleshoot-
ing p. 23 & 24, to determine the possible cause of any symptoms which
may be present.
4. As each unit is disassembled, reusable components should be
segregated and not allowed to intermix with nonreusable parts or parts
from other units. Delicate parts, including inlet fittings and crowns which
contain critical sealing surfaces, must be protected and isolated from
other parts to prevent damage during the cleaning procedure.
5. Use only genuine Aqua Lung ® parts provided in the overhaul parts
kit for this product. DO NOT attempt to substitute an Aqua Lung ® part
with another manufacturer's, regardless of any similarity in shape or
size.
6. Do not attempt to reuse mandatory replacement parts under any cir-
cumstances, regardless of the amount of use the product has received
since it was manufactured or last serviced.
7. When reassembling, it is important to follow every torque
specification prescribed in this manual, using a calibrated torque
wrench. Most parts are made of either marine brass or plastic, and can
be permanently damaged by excessive stress.
.

general conventions

Unless otherwise instructed, the following terminology and techniques
are assumed:
1. When instructed to remove, unscrew, or loosen a threaded
part, turn the part counterclockwise.
2. When instructed to install, screw in, or tighten a threaded part,
turn the part clockwise.
3. When instructed to remove an o-ring, use the pinch method
(see illustration below) if possible, or use a brass or plastic o-ring
removal tool. Avoid using hardened steel picks (unless directed),
as they may damage the o-ring sealing surface. All o-rings that are
removed are discarded and replaced with brand new o-rings.
4. The following acronyms are used throughout the manual: lp
is Low Pressure; Mp is Medium Pressure; and hp is High
Pressure.
5. Numbers in parentheses reference the key numbers on the
exploded parts schematics on pages 31 and 32. For example, in
the statement, "...remove the o-ring (31) from the...", number 31 is
the key number to the piston head o-ring.
Pinch Method
Press upwards on sides of o-ring to
create a protrusion. Grab o-ring or
insert o-ring tool at protrusion.
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