Solvent cleaning compound (MIL-PRF-680) can cause eye and skin irritation. Wear
protective rubber gloves and chemical splash goggles or faceshield to avoid skin or
eye contact. Use in a well ventilated area. First aid for skin contact: remove any con-
taminated clothing and wash skin thoroughly with soap and water. First aid for eye
contact: flush with water for 15 minutes or until irritation subsides. If irritation per-
sists, call a physician. If overcome by vapors, move from exposed area and call a phy-
sician. In case of ingestion, do not induce vomiting, call a physician immediately.
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 M3A1 CROP where dirt, grease or oil has
Check for missing, loose, bent or broken bolts, 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 SEMI-ANNUAL PREVENTIVE MAINTENANCE (Table 9-1) once every six months.
Always do the Preventive Maintenance in the same order until it gets to be a habit. Once prac-
ticed, 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:
(1) "Item No." column. Checks and services are numbered in a logical order for moving
around the M3A1 CROP. The item number column is used as a source of item numbers for
the TM Number Column on DA Form 2404, Equipment Inspection and Maintenance
Worksheet, for recording results of the PMCS.
(2) "Interval" column. This column identifies when the PMCS should be performed.
(3) "Item to Check/Service" column. This column identifies the item to be checked/serviced.
(4) "Procedure" column. This column contains all the information required to do the check/
(5) "Not Mission Capable If:" column. This column contains a brief statement of the condi-
tion (e.g., malfunction, shortage) that would cause the M3A1 CROP to be less than fully
ready to perform its assigned mission.