General Guidelines. Aqua Lung S.E.A. LV-2, SEA MK

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 understand 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 overhaul 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.

5

.

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; M p 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.

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 attempting 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, cleanliness, 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 circumstances, 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.