APPENDIX B. MAINTENANCE ALLOCATION CHART

TM 55-4920-378-14&P

APPENDIX B

MAINTENANCE ALLOCATION CHART

Section I. INTRODUCTION

rebuild operation includes the act of returning to

B-1. General. The purpose of the maintenance

zero those age measurements (hours, miles, etc.)

a l l o c a t i o n chart is to provide all activities with

c o n s i d e r e d in classifying Army equipment/com-

authorized

maintenance

functions

per-

ponents.

formed at each level of maintenance.

h . Repair. The application of maintenance

B - 2 . Maintenance functions. Maintenance func-

services (inspect, test, service, adjust, align, cal-

tions shall be limited to and defined as follows:

i b r a t e , replace) or other maintenance actions

a . Adjust. Maintain within prescribed lim-

( w e l d i n g , grinding, riveting, straightening, fac-

its by bringing into proper or exact position, or

i n g , remachining, or resurfacing) to restore ser-

b y setting the operating characteristics to the

viceability to an item by correcting specific dam-

s p e c i f i e d parameters.

age, fault, malfunction, or failure in a part,

subassembly,

module/component/assembly,

end

b. Align. To adjust specified variable el-

item or system.

ements of an item to bring about optimum or de-

s i r e d performance.

i . Replace. The act of substituting a ser-

viceable like-type part, subassembly, module

c . Calibrate. To determine and cause cor-

( c o m p o n e n t or assembly) in a manner to allow

r e c t i o n s to be made or to be adjusted on in-

t h e proper functioning of an equipment/system.

struments or test measuring and diagnostic

e q u i p m e n t used in precision measurement. Con-

s i s t s of comparisons of two instruments, one of

j . Service. Operations required periodically

which is a certified standard of known accuracy,

t o keep an item in proper operating condition,

t o detect and adjust any discrepancy in the ac-

i . e . , to clean, preserve, drain, paint, or to re-

curacy of the instrument being compared.

p l e n i s h fuel/1ubricants/hydraulic fluids or com-

pressed air supplies.

d . Inspect. To determine the serviceability

o f an item by comparing its physical, mechani-

k . Test. To verify serviceability and to de-

c a l , and/or electrical characteristics with estab-

t e c t incipient failure by measuring the mechani-

l i s h e d standards through examination.

c a l or electrical characteristics of an item and

c o m p a r i n g those characteristics with prescribed

e . Install. The act of emplacing, seating, or

standards.

fixing into position an item, part, module (com-

p o n e n t or assembly) in a manner to allow the

l . Symbols. The uppercase letter placed in

p r o p e r functioning of the equipment/system.

t h e appropriate column indicates the lowest lev-

e l at which that particular maintenance func-

f . Overhaul. That maintenance effort (ser-

tion is to be performed.

v i c e / a c t i o n ) necessary to restore an item to a

c o m p l e t e l y serviceable/operational condition as

B - 3 . Explanation of format. Purpose and use of

prescribed by maintenance standards (e.g.,

the format are as follows:

DMWR) in pertinent technical publications.

a . Column 1. Group number. Column 1 lists

Overhaul is normally the highest degree of

group numbers, the purpose of which is to

m a i n t e n a n c e performed by the Army. Overhaul

m a t c h components, assemblies, subassemblies

d o e s not normally return an item to like new

and modules with the next higher assembly.

condition.

b . Column 2. Functional group. Column 2

g. Rebuild. Consists of those services/ac-

lists the next higher assembly group and the

tions necessary for the restoration of un-

item names of components, assemblies, sub-

serviceable equipment to a like-new condition in

a s s e m b l i e s and modules within the group for

a c c o r d a n c e with original manufacturing stan-

w h i c h maintenance is authorized.

d a r d s . Rebuild is the highest degree of materiel

m a i n t e n a n c e applied to Army equipment. The

B-1