Lesson #5


Preventative Maintenance Checks and Services (PMSC).

PMCS is  a structured method of maintaining a piece of equipment in a fully mission capable condition so that it is mission ready when needed.

Designated Intervals. PMCS is conducted at specific time throughout your use of the equipment.  The following intervals are specified for PMCS under normal conditions:

Procedures .

The PMCS process is clearly defined in the technical manual (TM) for your piece of equipment.  The following are some basics with which you should be familiar.

Troublespots .

Dirt, grease, oil, and debris may cover up a serious problem. Clean as you check. Following precautions printed on the container, use drycleaning solvent (SD-3) on all metal surfaces. On rubber or plastic material, use soap and water.


Wetness around seals, gaskets, fittings, or connections indicates leakage. A stain also denotes leakage. If a fitting or connector is loose, tighten it. If broken or defective, report it. Use the following as a guide:


Operation is allowable with Class I or II leakage except for brake system. Any brake fluid leakage must be reported. WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR. When operating with Class I or II leaks, check fluid levels more frequently. Class III leaks must be reported immediately to your supervisor or to unit maintenance. Failure to do this will result in damage to vehicle and/or components.


For lubrication requirements and procedures, refer to the appropriate TM.  Lubrication specifications will be located in an appendix.

The PMCS Checklist.

Each TM contains a checklist to guide you in performing your PMCS.  The checklist consists of 5 columns.

Item Number. The "item number" is a reference to the item inspected.  When the maintenance crew looks at block 10a of your DA Form 2404 for any faults you may listed, they will reference the item number you listed in the appropriate TM. Remember, if you find no faults during your PMCS then don't enter an item number on the DA Form 2404. If you find a fault, list the item number that applies to the fault in block 10a. If you find a fault that is not covered by the TM then don't enter an item number. Circle the item number if the fault is listed as "equipment is not ready/available" or "not mission capable" in the TM. If you can fix the fault then don't make any reference to the fault on your DA Form 2404.

Interval. The "interval" column tells you when the inspection should take place, as discussed at the beginning of this lesson. If you are conducting a "Before" operation PMCS then you would inspect all items listed as "Before" in the interval column of the checklist.

Location or Item to Check/Service. The "location" or "item to check/service" column will tell you where or what to inspect and/or service.

Crewmember and Procedure. The "crewmember" and "procedure" column will tell you who is responsible for the described task and how to perform the task.

Not Fully Mission Capable if. The "not fully mission capable if" column tells you what condition requires you to list the vehicle as "deadlined".

Item No.




Not Fully Mission Capable if:

Item to Check/ Service










Left Front Side,





If leaks are detected in the area of the transfer case oil cooler, do not attempt to tighten retaining nuts; internal damage to the transfer case oil cooler may result. Notify unit maintenance.


If leakage is detected, further investigation is needed to determine the location and cause of the leak.                                                          

a. Visually check underneath vehicle for any evidence of leak fluid leakage.

b. Visually check front and left side of vehicle for obvious damage that would  impair operation.










                                             a. Any brake fluid; class III leak of oil, fuel, or coolant.

b. Any damage that will prevent operation.




Example Page from a PMCS Checklist in the TM