OPERATOR MAINTENANCE INSTRUCTIONS
ARMY SPACE HEATER H-140
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION
PMCS are performed to keep the ASH in operating condition. Inspect the ASH within specified intervals so defects are
found and corrected or problems are reported before any serious damage or failure occurs. Do the PMCS per the PMCS
work package (WP 0014 00). Pay attention to WARNING and CAUTION statements. A WARNING means someone could
be hurt. A CAUTION means equipment could be damaged.
Designated intervals are performed under usual operating conditions. PMCS intervals must be performed
more frequently when operating under unusual conditions.
Be sure to perform your PMCS each time you operate the equipment. Always do your PMCS in the same order so that it
gets to be a habit. Once you have had some practice, you will quickly spot anything wrong.
Do your BEFORE (B) PMCS just before you operate the equipment. Pay attention to WARNING, CAUTION, and
Do your DURING (D) PMCS while you operate the equipment. During operation means to monitor the equipment and
its related components while it is actually being operated. Pay attention to WARNING, CAUTION, and NOTE
Do your AFTER (A) PMCS right after operating the equipment. Pay attention to WARNING, CAUTION, and NOTE
Do your WEEKLY (W) PMCS once a week.
Do your MONTHLY (M) PMCS once a month.
If you find something wrong when performing the PMCS, fix it if you can using the Operational Checkout and
If anything looks wrong and you cannot repair it, write it on your DA Form 2404. Report it immediately to your
EXPLANATION OF COLUMNS IN THE PMCS
The ITEM column is a numeric listing of the order in which you are to do the check or service.
The INTERVAL column tells you when to do a certain check or service.
The ITEM TO BE CHECKED OR SERVICED column tells you what equipment to check or service.
The PROCEDURE column tells you how to do the required check or service. Carefully follow these instructions. If you
do not have tools, or if the procedure tells you to, notify your supervisor.