2.1.
INTRODUCTION
The four categories of maintenance are organizational, direct support, general support, and depot.
Organizational maintenance is that authorized for, performed by, and the responsibility of a using
organization on equipment it possesses. Direct support maintenance is that authorized and performed by
designated maintenance activities in direct support of using organizations. This category is limited to
repairing end items or unserviceable assemblies in support of using organizations on a return-to-user
basis.
General support maintenance is that authorized and performed by designated table of
organization and equipment (TOE) and table of distribution (TD) organizations in support of the Army
supply system. Normally. TOE and TD3 organizations repair or overhaul materiel to required
maintenance standards in a ready-to-issue condition based on applicable supported army area supply
requirements. Depot maintenance activities, through overhaul of economically repairable materiel,
augment the procurement program in satisfying overall Army requirements and, when required, provide
for repair of materiel beyond the capability of general support maintenance organizations. Appropriate
technical manuals cover each category of maintenance. For example, organizational maintenance
instructions for diesel-electric locomotive, model MRS-1, are given in TM 55-2210-201-20.
Since diesel engines range from about 59 to around 2,590 horsepower, the servicing of these
engines varies a great deal. The engine maker's service books and instructions and the pertinent
technical manual should always be available to service personnel and referred to before any repair work
is attempted.
Service schedules are usually worked out according to a locomotive's mileage or to its hours in
service. Hours in service is probably the best guide for such servicing as tappet adjustment or changing
oil filters or oil, while mileage is a good guide for the
47
Previous Page
