TM 9-4310-394-13
2-2. OPERATOR'S CONTROLS AND INDICATORS. - Continued.
l. Inflation Gauge (12). During the inflation process, it is very important to know what the pressure is within the
component being inflated. An inflation gauge is mounted at the end of the air hose which shows this internal pressure.
m. Key Switch (13). When the ACU is connected to a battery, this key switch will allow the operator to operate the
intake air preheater or start the diesel engine by using the electric starter.
n. Manual Recoil Starter (14). When the diesel engine is not connected to a battery, it can be started by use of
the manual recoil starter located on the side of the engine. After pulling the handle out firmly and quickly, the engine will
start.
o. Relief Valve (15). To maintain a constant pressure in the system, this relief valve will automatically open or
closed as needed to maintain a constant pressure 175 psi.
p. Safety Valve (16). In the event that the relief valve malfunctions, this safety valve is set to release air from the
system if the air pressure exceeds 220 psi.
q. Sight Glass (17). A sight glass is provided on the compressor to indicate the compressor crankcase oil level.
r.
Unloader Valve (18). Because the pressure within the air compressor system can resist the action of the diesel
engine during start up of the ACU, an unloader valve is provided to release the compressed air in everything but the
receiver tank to allow for easier staring of the engine.
Section II. OPERATOR PREVENTIVE MAINTENANCE
CHECKS AND SERVICES
2-3. GENERAL. Preventive Maintenance Checks and Services (PMCS) means systematic caring, inspecting, and
servicing of equipment to keep it in good condition and to prevent breakdowns. As the operator of the air compressor
unit, your mission is to:
a.
Be sure to perform your PMCS each time you operate your air compressor unit. Always do your PMCS in the
same order, so it gets to be a habit. Once you've had some practice, you'll quickly spot anything wrong.
b.
Do your BEFORE (B) PMCS just before you operate the air compressor unit. Pay special attention to all
WARNINGS, CAUTIONS, and NOTES.
c.
Do your DURING (D) PMCS while you are operating the air compressor unit. During operations means to
monitor the air compressor unit and its related components while it is actually being operated. Pay special attention all
WARNINGS, CAUTIONS, and NOTES.
d.
Do your AFTER (A) PMCS right after you have operated the air compressor unit. Pay special attention to all
WARNINGS, CAUTIONS, and NOTES.
e.
Do your WEEKLY PMCS once a week.
f.
Do you MONTHLY PMCS once a month.
g.
Use DA Form 2404 (Equipment Inspection and Maintenance Worksheet) to record any faults that you discover
before, during, or after operation unless you can fix them. You do not need to record faults that you fix.
h.
Be prepared to assist unit maintenance in any lubrication procedures. Perform any other services when required
by unit maintenance.
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