Appendix C. MAINTENANCE ALLOCATION CHART

TM 10-3930-647-14&P

APPENDIX

MAINTENANCE

ALLOCATION

CHART

FOR

TRUCK,

FORKLIFT,

GED,

SRT,

4,000-LB.

CAPACITY,

CLARK

MODEL

C500Y45

Section

INTRODUCTION

1. General.

h. Replace. The act of substituting a serviceable

like type part, subassembly or module (component

This maintenance allocation chart (MAC)

or assembly) for an unserviceable counterpart.

designates responsibility for performance of main-

i. Repair. The application of maintenance services

tenance functions to specific maintenance

or other maintenance actions to restore ser-

categories.

viceability to an item by correcting specific damage,

2. Maintenance Functions.

fault, malfunction or failure in a part, subassembly,

module (component or assembly), end item or

Maintenance functions are as follows:

system.

a. Inspect. To determine the serviceability of an

j. Overhaul.

That maintenance effort (ser-

item by comparing its physical, mechanical and/or

vice/action) necessary to restore an item to a com-

electrical characteristics with established standards

pletely

serviceable/operational

condition as

through examination.

prescribed by maintenance standards (i.e., DMWR)

b. Test. To verify serviceability and detect in-

in appropriate technical publications. Overhaul is

cipient failures by measuring the mechanical or elec-

normally the highest degree of maintenance per-

t r i c a l characteristics of an item and comparing

formed by the Army. Overhaul does not normally

those characteristics with prescribed standards.

return an item to like new condition.

c. Service. Operations required periodically to

k. Rebuild. Consists of those services/actions

keep an item in proper operating condition; i.e., to

necessary for the restoration of unserviceable equip-

clean (decontaminate), to preserve, to drain, to paint

ment to a like new condition in accordance with

or to replenish fuel, lubricants, hydraulic fluids or

original maunfacturing standards. Rebuild is the

compressed air supplies.

highest degree of materiel maintenance applied to

d. Adjust. To maintain, within prescribed limits,

Army-equipment. The rebuild operation includes the

by bringing into proper or exact position or by set-

act of returning to zero those age measurements

ting the operating characteristic to specified

(hours/miles, etc.) considered in classifying Army

parameters.

equipment/components.

e. Align To adjust specified variable elements of

an item to bring about optimum or desired per-

3. Column Entries.

formance.'

Columns used in the MAC are explained below:

f. Calibrate. To determine and cause corrections

a. Column l-Group Number. Column One (1)

to be made or to be adjusted on instruments or test

lists group numbers from TB 750-93-1, the purpose

measuring and diagnostic equipment used in

o f which is to identify components, assemblies,

precision measurement. Consists of comparisons of

subassemblies and modules with their next higher

two instruments, one of which is a certified standard

assemblies.

o f known accuracy, t o d e t e c t a n d a d j u s t a n y

b. Column 2-Component/Assembly. Column

discrepancy in the accuracy of the instrument being

Two (2) contains the noun names of components,

compared.

assemblies, subassemblies and modules for which

g. Install. The act of emplacing, seating or fixing

maintenance is authorized.

into position an item, part or module (component or

c. Column 3-Maintenance Functions. Column

assembly) in a manner to allow the proper func-

Three (3) lists the functions to be performed on the

tioning of an equipment or system.

C-1