TM 5-4310-381-13
SECTION II. OPERATOR'S PREVENTIVE MAINTENANCE
CHECKS AND SERVICES (PMCS)
2-2.
GENERAL. The operator's PMCS table lists the inspections and service procedures to properly maintain the air
compressor in good operating condition. Items covered here are appropriate for operator level only. Always keep in
mind the CAUTIONS and WARNINGS before performing checks and services listed in the PMCS table.
2-3.
PMCS TABLE FORMAT. The following columns make up the PMCS table.
a.
Item No. Each maintenance check is identified by a separate item number. The item column will be used as a
source of item numbers for the "TM Number" column on DA Form 2404, Equipment Inspection and Maintenance
Worksheet, in recording results of PMCS.
b.
Interval. The interval column of the PMCS table identifies when to perform the service check or maintenance. A
dot () appears underneath the appropriate column(s) abbreviation:
B — Before Operation
D — During Operation
A — After Operation
W — Weekly
c.
Item To Be Inspected/Procedure. This column identifies how to perform the required checks and services.
Carefully follow these instructions. If appropriate tools are not available to operator, unit maintenance should perform the
work. Report any malfunctions or failures to unit maintenance.
d.
Equipment Not Ready/Available If: This column indicates when and why equipment cannot be used after
completing the specific PMCS.
NOTE
The terms ready/available and mission capable refer to the same status:
Equipment is on hand and is able to perform its combat missions (see
DA PAM 738-750).
2-4.
SPECIAL INSTRUCTIONS.
NOTE
If the equipment must be kept in continuous operation, check and
service only those items that can be checked and serviced without
disturbing operation. Make the complete checks and services when the
equipment can be shut down.
a.
"Before Operation (B)" checks should be limited to those required for consecutive application by an assigned
operator/crew. Perform "Weekly (W)" as well as "Before Operation (B)" PMCS if:
(1) Compressor has not been operated since the last weekly PMCS, or;
(2) Compressor is being operated for the first time.
b.
Leakage definitions for operator/crew PMCS are classified as follows:
Class I
Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
Class II Leakage of fluid great enough to form drops but not enough to cause drops to drip from item being checked /
inspected.
Class III Leakage of fluid great enough to form drops that fall from the item being checked/inspected.
CAUTION
Equipment operation is allowable with minor leakages (Class I or II).
Consider the fluid capacity in the item/system being checked/inspected.
When in doubt, notify your supervisor.
When operating with Class I or Class II leaks, continue to check fluid
levels as required by PMCS table.
Class III leaks should be reported to unit maintenance.
2-2
