TM 5-4220-233-14
4-13.
GENERAL.
a.
These general maintenance instructions contain general shop practices and specific methods you must be
familiar with to properly maintain your Servicing Unit. You should read and understand these practices and
methods before performing any unit maintenance tasks.
NOTE
It should be understood that the portions of the Servicing Unit which comprise the
Compressed System require special shop practices. These practices must be
followed to maintain cleanliness of diving life support air systems. Refer to Section
VII of this chapter for more detailed Information.
b.
Before beginning a task, find out how much repair or replacement is needed to fix the equipment.
Sometimes the reason the for equipment failure can be seen right away, and complete teardown is not
necessary. Disassemble equipment only as far as necessary to repair or replace broken or damaged parts.
c.
The following "Initial Setup" information applies to each procedure:
(1) Resources are not listed unless they apply to the procedure.
(2) Personnel are listed only if more than one technician is required to complete the task. If "Personnel
Required" is not listed, one technician can complete the task.
d.
All tags and forms attached to equipment must be checked to learn the reason that the equipment was
removed from service. Modification Work Orders (MWOs) and Technical Bulletins (TBs) for equipment
changes and updates must be applied to equipment before return to service.
4-14.
WORK SAFETY.
a
Observe all WARNINGs and CAUTIONs. Always use power tools carefully.
b.
Protect yourself against injury. Wear eye protection and safety shoes at all times when performing
maintenance. When cleaning components rubber gloves and protective clothing should be worn.
c.
When lifting heavy parts, have someone help you. Ensure that lifting/jacking equipment Is working
properly, is suitable for the assigned task, and is secured against slipping.
d.
Keep tools and equipment used on the Compressed Gas System separated from those used to maintain
other parts of the Servicing Unit.
e.
Use caution when working on high pressure air systems. Pressure should always be vented before
loosening connections.
f.
Handle open connections on Compressed Gas System with care. Always cap or plug open ports to prevent
contamination.
4-15.
CLEANING INSTRUCTIONS.
These instructions do not apply to the Compressed Gas System portion of the Servicing Unit. Refer to Section
VII to clean components for breathing air service.
WARNING
Improper cleaning methods and use of unauthorized cleaning liquids or
solvents can Injure personnel and damage equipment. To prevent this, refer
to TM 9-247 for further Instructions.
a.
General. Cleaning instructions will be the same for the majority of parts and components which make up
the trailer assembly and non-compressed gas portions of body assembly. The following should apply to
all cleaning operations.
(1) Clean parts before inspection, after repair, and before assembly.
(2) Keep hands free of grease and oil which can collect dust, dirt, and grit.
(3) After cleaning, all parts should be covered or wrapped to protect them from dust and dirt. Parts that
are subject to rust should be lightly oiled before covering.
4-15
