TM 5-6675-250-20
B - 2 . M A I N T E N A N C E F U N C T I O N S ( C o n t i n u e d)
h.
Replace. The act of substituting a serviceable like type part, subassembly, or module (compo-
nent or assembly) for an unserviceable counterpart.
i.
Repair.
The application of maintenance services (inspect, test, service, adjust, align, calibrate,
or replace) or other maintenance actions (welding, grinding, riveting, straightening, facing, rema-
chining, or resurfacing to restore serviceability to an item by correcting specific damage, fault,
malfunction, or failure in a part, subassembly, module (component or assembly), end item, or sys-
t e m .
j.
O v e r h a u l.
That maintenance effort (service/actions) necessary to restore an item to a complete-
l y s e r v i c e a b l e / o p e r a t i o n a l c o n d i t i o n a s p r e s c r i b e d b y m a i n t e n a n c e s t a n d a r d s ( i . e . , D M W R ) in
appropriate technical publications. Overhaul is normally the highest degree of maintenance per-
formed by the Army. Overhaul does not normally return an item to like new condition.
k.
R e b u i l d.
C o n s i s t s o f t h o s e s e r v i c e s / a c t i o n s n e c e s s a r y f o r t h e r e s t o r a t i o n o f u n s e r v i c e a b l e
equipment to a like new condition in accordance with original manufacturing standards. Rebuild
is the highest degree of materiel maintenance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements (hours/miles, etc), considered in
c l a s s i f y i n g A r m y e q u i p m e n t / c o m p o n e n t s.
B-3. COLUMN ENTRIES USED IN THE MAC
a.
Column 1, Group Number. Column 1 lists group numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules with the next higher assembly.
b.
C o l u m n 2 , C o m p o n e n t / A s s e m b l y.
C o l u m n 2 c o n t a i n s t h e n a m e s o f c o m p o n e n t s , a s s e m b l i e s ,
subassemblies, and modules for which maintenance is authorized.
c .
C o l u m n 3 , M a i n t e n a n c e F u n c t i o n s.
Column 3 lists the functions to be performed on the item
listed in column 2. (For detailed explanation of these functions, see paragraph B-2.)
B-2
