Clean as you work and as needed. Dirt, grease, oil and debris may get in the way and cover up a
problem. Use solvent cleaning compound (Item 3, Appendix E) to clean M3 CROP where dirt, grease or oil has
Check for missing, loose, bent or broken bolts, deck fasteners, nuts and screws. Look for chipped
paint, bare metal or rust around bolt heads. Tighten loose parts.
Look for loose paint, rust or gaps where parts are welded together. If you find a bad weld, report it
to Direct Support Maintenance.
If cracks are detected, notify Direct Support Maintenance to perform further inspection.
Do the SEMIANNUAL PREVENTIVE MAINTENANCE (Table 4-1) once every six months.
Always do the Preventive Maintenance in the same order until it gets to be a habit. Once practiced,
it will be easy to spot anything wrong in a hurry.
If anything looks wrong and is not fixed, write it on a DA Form 2404.
When doing Preventive Maintenance, take along the tools and supplies needed to make all the
checks, including a clean cloth or two.
The following is a breakdown of the PMCS table:
"Item No." column. Checks and services are numbered in a logical order for moving around
the M3 CROP. The item number column is used as a source of items numbers for the TM
Number Column on DA Form 2404, Equipment Inspection and Maintenance Worksheet, for
recording results of the PMCS.
"Interval" column. This column identifies when the PMCS should be performed.
"Item To Check/Service" column. This column identifies the item to be checked/serviced.
"Procedure" column. This column contains all the information required to do the check/
"Not Mission Capable If:" column. This column contains a brief statement of the condition
(e.g., malfunction, shortage) that would cause the M3 CROP to be less than fully ready to
perform its assigned mission.