Apeks XL4 Service Manual

5
XL4 2nd Stage Maintenance Manual
NOTE: Before performing any disassembly, refer
to the exploded parts drawing, which references
all mandatory replacement parts. These parts
should be replaced with new, and must not be
reused under any circumstances - regardless of
the age of the regulator or how much use it has
received since it was last serviced.
CAUTION: Use only a plastic, brass or
aluminium ‘O’ Ring removal tool (PN AT79)
when removing ‘O’ Rings to prevent damage
to the sealing surface. Even a small scratch
across an ‘O’ Ring sealing surface could
result in leakage. Once an ‘O’ Ring sealing
surface has been damaged, the part must
be replaced with new. DO NOT use a dental
pick, or any other steel instrument.
Pinch Method
Press upwards
on sides of ‘O’
Ring to create a
protrusion. Grab
‘O’ Ring or insert
‘O’ Ring tool at
protrusion.
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 and to learn which
specialty tools and replacement parts will be required
before commencing disassembly. 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 specically set up and equipped for the task.
Adequate lighting, cleanliness, and easy access to
all required tools are essential for an efcient repair
facility.
3. During disassembly, reusable components should
be segregated and not allowed to intermix with non
reusable parts or parts from other units. Delicate parts,
including inlet ttings and valve seats which contain
critical sealing surfaces, must be protected and
isolated from other parts to prevent damage during the
cleaning procedure.
4. Use only genuine Apeks parts provided in the 2nd
stage service kit (AP0219). DO NOT attempt to
substitute an Apeks part with another manufacturer’s,
regardless of any similarity in shape or size.
5. 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.
6. When reassembling, it is important to follow every
torque specication 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 undue stress.
Unless otherwise instructed, the following terminology and
techniques are assumed:
1. When instructed to remove, unscrew, or loosen a
threaded part, turn the part anti-clockwise.
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 gure below) if possible, or use a brass,
aluminium or plastic ‘O’ Ring removal tool. Avoid using
hardened steel picks, as they may damage ‘O’ Ring
sealing surfaces. All ‘O’ Rings that are removed are
discarded and replaced with brand new ‘O’ Rings.
4. The following acronyms are used throughout the
manual: MP is Medium Pressure; HP is High Pressure;
PN is Part Number.
5. Numbers in parentheses reference the key numbers
on the exploded parts schematics. For example, in the
statement, “...remove ‘O’ ring (11) from...”, the number
11 is the key number to the Inlet Fitting ‘O’ Ring.
GENERAL GUIDELINES GENERAL CONVENTIONS
DISASSEMBLY PROCEDURES

Apeks XL4 Specifications

General

Brand	Apeks
Model	XL4
Category	Controller
Language	English