The Army must remain in a state of readiness at all times. It is imperative that all equipment be maintained
and that records indicating conditions which render any piece of equipment not mission-ready be maintained
and updated in a consistent manner at all bases. This lesson provides the background and procedures to
accomplish this task.
PART A - TECHNICAL MANUALS (TM)
The most important task associated with the proper performance of operator/crew-level preventive
maintenance checks and services (PMCS) is mastering the proper use of the operators TM. Once an
understanding of how to use the TM as a guide through the PMCS task is acquired, a PMCS on any piece of
Army equipment can be accomplished with minimal additional training. All TM (-10s) are broken down into
the following sections:
Table of contents
Cautions and warnings
The chapter containing the PMCS table
The Basic Issue Items List
The chapter containing maintenance instructions.
The PMCS table lists the services that are to be performed by the operator or crew. They are performed
within the interval shown and in numerical sequence within each interval as indicated by item number. The
PMCS tables are broken into the following sections:
Item/sequence numbers column
Not ready if/not mission capable column
Item to be inspected/checked column
All Army vehicles, and most other equipment that requires operator-level maintenance have a -10 TM
organized in a similar manner. Operators/crews perform different types of checks and services at different
intervals for different reasons as described below:
Before-Operation PMCS -These are checks performed by the operator/crew per the -10 TM PMCS.
The tables identify faults which prevent the performance of the mission and must be corrected prior to
the start of the mission. All other faults are corrected or (if above operator/crew authorization to correct)
reported during or after the mission.
During-Operation PMCS - These are checks performed by the operator/crew per the -10 TM PMCS
tables. These tables monitor and identify faults in equipment performance during the mission. Faults
which render the equipment not-mission-capable (NMC) require immediate correction. All other faults
are corrected or (if above operator/crew authorization to correct) reported during or after the mission.
After-Operation PMCS - These are checks and services performed per the -10 TM PMCS tables. The
tables immediately at the conclusion of the mission are used to identify and correct faults which will
prevent the next mission and to maintain the equipment to -10/20 standards. Faults which render the
equipment NMC must be corrected prior to the start of the next mission. All other faults are corrected or
(if above operator/crew level authorization to correct) reported to unit maintenance before the next
Periodic Operator/Crew PMCS - Checks and services performed by the operator/crew per the -10 TM
PMCS tables Items-To-Be-Checked column to identify faults which must be corrected to maintain
equipment to the -10/20 TM standards. Faults requiring correction beyond operator/crew level will be
reported to unit level maintenance for correction.
The LO (lubricating order) - This is where you find the locations for, type of, and capacity of POL
products for the equipment.
The purpose of the various checks and services is to identify equipment faults (things that are wrong with the
equipment), and service some points that require frequent attention. There are two types of equipment
defects that are identified during PMCS periods:
Fault - A fault is a defect in a piece of equipment that does not prevent the operation of the equipment,
but must be corrected as soon as possible. The "/" status symbol is entered on DA Form 2404 to
indicate a fault exists.