OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
Preventive Maintenance Checks and Services (PMCS) are performed to keep the Hydraulic Excavator in
operating condition. The checks are used to find, correct, or report problems. Crewmembers are to do the
PMCS jobs as shown in the PMCS table. PMCS are done every day the vehicle is operated, using the
PMCS table. Pay attention to WARNING and CAUTION statements. A WARNING means someone could
be hurt. A CAUTION means equipment could be damaged.
NOTE: As this operator manual is a commercial product supplemented to include Army specific
procedures, the manual may advise the operator to perform tasks that would normally not be
assigned to the operator level in a DATM. Always follow the limits established in the PMCS.
See also Chapter 3, Break-In, and Chapters 10 through 17, Scheduled Maintenance, for additional
Before you begin operating the Hydraulic Excavator, do Before PMCS.
During operation, do During PMCS.
After operation, do After PMCS.
Once a week do Weekly PMCS. If Hydraulic Excavator has not been operated in a week, also do Before
PMCS at the same time.
Do Monthly PMCS once a month. If Hydraulic Excavator has not been operated in a month, also do After
PMCS at the same time.
If you are operating the Hydraulic Excavator for the first time, do your Weekly and Monthly PMCS the
first time you do your Before PMCS.
If you find something wrong when performing PMCS, fix it if you can using troubleshooting procedures
and/or maintenance procedures in this manual or notify your supervisor.
The right-hand column of the PMCS table lists conditions that make the Hydraulic Excavator not fully
mission capable. Write up items not fixed on DA Form 2404 for unit maintenance. For further information
on how to use this form, see DA PAM 738-750.
A-2. LEAKAGE DEFINITION
CAUTION: Equipment operation is allowable with minor leakages (Class I or II) except for fuel
leaks. Of course, consideration must be given to the fluid capacity of the item or system being
checked. When in doubt, ask your supervisor.
When operating with Class I or II leaks, continue to check fluid levels as required in the PMCS.
Class III leaks should be reported immediately to your supervisor.