CHAPTER II
SECTION I.
INTRODUCTION AND GENERAL INFORMATION
1-1.
INTRODUCTION:
This
chapter
contains
operation and maintenance instructions with illustrated
parts break-down for the Type I, Manifold Servicing Unit,
Air Part Number 83208, and Type II, Manifold Servicing
Unit, Dual Air/Oxygen, Part Number 83209. Leading
features of the Servicing Units (Type I and Type II) are
listed in Table 1-1. Type I and Type II Manifold Servicing
Units are as shown in Figure I-1, and hereafter shall be
referred to as Servicing Unit, Air (Type I) or Servicing
Unit, Air/Oxygen (Type II).
1-2.
GENERAL INFORMATION. The Servicing
Units (Type I and Type II) are mounted on Government
Furnished M116A1, 3/4 Ton, 2 Wheel Chassis Trailers.
Each trailer assembly is designed to carry eight high
pressure supply cylinders that are to be used in
recharging one to four scuba cylinders at the same time
Operating temperature range of the Servicing Units is -
250F tol20°F (-320 to 490C) The Servicing Unit, Air
(Type 1) is designed to carry eight 3500 psi compressed
gas cylinders for breathable air use. The Servicing Unit,
Air/Oxygen (Type II) is designed to carry four 3500 psi
compressed gas cylinders of breathable air and four
2260 psi compressed gas cylinders for breathable
oxygen use. The Servicing Units are air transportable
and are designed to operate under extreme climatic
conditions.
1-3.
DESCRIPTION. The Servicing Units (Type I and
Type II) consist of the housing group, the control panel
group, the air purification cylinder group and the welded
frame group (See Figure 1-1.)
1-4.
HOUSING GROUP (1, Figure 1-1). The
housing group consists of a top cover, side covers, left
and right hand doors, an undershield and a tool box.
The housing components are attached to the welded
frame, and provides protection for the control panel
group and cylinder valves
1-5.
COMPRESSED GAS CYLINDERS (2, Figure I-
1) These cylinders are used to either store breathable air
on the Type I (Air) Servicing Units, or a combination of
breathable air and oxygen on the Type I1 (Air/Oxygen)
Servicing Units.
1-6.
CONTROL PANEL ASSEMBLIES (Type I and
Type II). The control panel is located behind the doors of
the servicing unit, (see 1, Figure 1-1) The control panels
are configured to allow the charging of one to four scuba
cylinders. The control panels are attached to the welded
frame assembly
1-7.
AIR PURIFICATION CYLINDER GROUP (Type
I and Type II). The purification cylinders are located
within the breathable air system or oxygen system so
that a final filtering of the air or oxygen is provided before
it enters into the scuba tanks Access to the purification
cylinders is through the hinged top cover of the housing
group The purification cylinders are attached to the
welded frame assembly
1-8.
WELDED FRAME ASSEMBLY (7, Figure 1-1).
The welded frame provides the mounting base for all the
components of the Servicing Units (Type I and Type II).
The service troughs, stabilizing jack, control panel,
fender assemblies and housing group attach directly to
the welded frame The mounts directly onto the
Government furnished M116A1 3/4 Ton Trailer
1-9.
CONSUMABLE MATERIALS. Consumable
materials as pertain to the Government Furnished MI I6A
I ¾ Ton Trailer are as specified m TM9-2330-202-14P
Consumable materials for the Type I and Type II
Servicing Units follows:
Nomenclature
Material
Specification Number
Government Std.
Davey Part Number
Air/Oxygen Purification Ca1
Cartridge
MILC-26058
MA-2
Cleaning*
Solvent
P-D-680, Type II
Detergent
P-D-220
Fittings (leak proofing)*
Tape, Antiseize
MIL-T-27730
Tubing and Fittings (joining)* Sealing
Fabric, Cushioning
Webbing
14048
Fittings (leak proofing)**
Tape, Virgin Teflon
Tubing and Fittings (joining)** Sealing-Dupont Krytox
(fluorinated grease)
*Type I only
**Type I and Type Il
1-1
