PART TWO—VEHICLE MAINTENANCE INSTRUCTIONS

Section VII

MAINTENANCE ALLOCATION

 Paragraph
Scope24
Allocation of maintenance25

24. SCOPE.

a. The scope of maintenance and repair by the crew and other units of the using arms is determined by the availability of suitable tools, availability of necessary parts, capabilities of the mechanics, time available, and the tactical situation. All of these are variable and no exact system of procedure can be prescribed.

25. ALLOCATION OF MAINTENANCE.

a. Indicated below are the maintenance duties for which tools and parts have been provided for the using arm and maintenance personnel. Replacements and repairs which are the responsibility of ordnance maintenance personnel may be performed by using arm personnel when circumstances permit, within the discretion of the commander concerned. Echelons and words as used in this list of maintenance allocations are defined as follows:

First and Second Echelon:
Table III
AR 850–15		 Operating organization driver, operator or crew, companies and detachments, battalions, squadrons, regiments, and separate companies and detachments (first and second echelons, respectively).
Third Echelon:
Table III
AR 850–15		 Technical light and medium maintenance units, including post and port shops.
Fourth Echelon:
Table III
AR 850–15		 Technical heavy maintenance and field depot units including designated post and service command shops.
Fifth Echelon:
Table III
AR 850–15		 Technical base units.
Service:
(Including preventive maintenance) par. 24 a (2) and (3) in part AR 850–15		 Checking and replenishing fuel, oil, grease, water and antifreeze, air, and battery liquid; checking and tightening nuts and bolts; cleaning.
Service:
(Including preventive maintenance) par. 24 a (2) and (3) in part AR 850–15		 Checking and replenishing fuel, oil, grease, water and antifreeze, air, and battery liquid; checking and tightening nuts and bolts; cleaning.
Replace:
Par. 24 a (5)
AR 850–15		 To remove an unserviceable part, assembly, or subassembly from a vehicle and replace it with a serviceable one.
Repair:
Par. 24 a (6) in part
AR 850–15		 To restore to a serviceable condition, such parts, assemblies or subassemblies as can be accomplished without completely disassembling the assembly or subassembly, and where heavy riveting, or precision machining, fitting, balancing, or alining is not required.
Rebuild:
Par. 24 a (6)
AR 850–15		 Consists of stripping and completely reconditioning and replacing in serviceable condition any vehicle or unserviceable part, subassembly, or assembly of the vehicle, including welding, riveting, machining, fitting, alining, balancing, assembling, and testing.
Reclamation:
AR 850–15 Par. 4 (c) in part CIR. 75, dated 16 March ’43		 Salvage of serviceable or economically repairable units and parts removed from vehicles, and their return to stock. This includes the process which recovers and/or reclaims unusable articles or component parts thereof and places them in a serviceable condition.

NOTES: (1) Operations allocated will normally be performed in the echelon indicated by X.

(2) Operations allocated to the third echelon as indicated by E may be performed by these units in emergencies only.

(3) Operations allocated to the fourth echelon by E are normally fifth echelon operations. They will not be performed by the fourth echelon, unless the unit is expressly authorized to do so by the chief of the service concerned.

  ECHELONS
CLUTCH 2nd 3rd 4th 5th
Bearings, clutch release—replace X      
Clutch—replace and/or repair (reline)   X    
Hub, clutch—replace   X    
Hub, clutch—repair     X  
Sprocket assembly, clutch—replace   X    
Sprocket assembly, clutch—repair     X  
 
CONTROLS AND LINKAGE  
Controls and linkage—service and/or replace X      
Controls and linkage—repair   X    
 
ELECTRICAL GROUP  
Battery—service (recharge) and/or replace X      
Battery—repair   X    
Battery—rebuild     E X
Cables, battery—replace and/or repair X      
Coil, ignition—replace X      
Head, speedometer—replace X      
Head, speedometer—repair   X    
Head, speedometer—rebuild     X  
Horn assembly—replace X      
Horn assembly—repair   X    
Light assemblies—service and/or replace X      
Light assemblies—repair   X    
Panel, instrument—replace X      
Panel, instrument—repair   X    
Switch assemblies—replace X      
Switch assemblies—repair   X    
Wiring—replace X      
 
ENGINE  
(V–45″–Twin Engine)  
Bearings, main—replace     E X
Bearings, connecting rod—replace     E X
Breaker assembly, circuit—replace X      
Breaker assembly, circuit—repair   X    
Breaker assembly, circuit—rebuild     X  
Carburetor—replace X      
Carburetor—repair   X    
Carburetor—rebuild     X  
Cleaner, air—service and/or replace X      
Cleaner, air—repair   X    
Cleaner, air—rebuild     X  
Cylinder assembly—replace   X    
Cylinder assembly—repair     X  
Cylinder assembly—rebuild (recondition)     E X
Condenser—replace X      
Engine assembly—replace *4 X    
Engine assembly—repair   X    
Engine assembly—rebuild     E X
Gasket, cylinder head—replace X      
Gears, timing—replace   E X  
Generator assembly—replace X      
Generator assembly—repair   X    
Generator assembly—rebuild     X  
Head, cylinder—replace and/or repair   X    
Lines and connections—replace X      
Lines and connections—repair   X    
Pistons, rings and pins assembly—replace   E E X
Plug, spark—replace X      
Points, circuit breaker—service and/or replace X      
Pump assembly, feed—replace X      
Pump assembly, feed—repair   X    
Pump assembly, feed—rebuild     X  
Pump assembly, oil—replace X      
Pump assembly, oil—repair   X    
Pump assembly, oil—rebuild     X  
Pump assembly, oil scavenger—replace and/or repair   X    
Pump assembly, oil scavenger—rebuild     X  
Rod, connecting—replace and/or rebuild (recondition)     X X
Sprocket, engine—replace X      
Strained gasoline—replace and/or repair   X    
Valves—service X      
 
EXHAUST GROUP  
Muffler and exhaust pipe—replace X      
Muffler and exhaust pipe—repair   X    
 
MISCELLANEOUS  
Bars, safety—replace X      
Bars, safety—repair   X    
Boxes, ammunition, battery and tool—replace X      
Boxes, ammunition, battery and tool—repair   X    
Carriers, luggage and scabbard—replace X      
Carriers, luggage and scabbard—repair   X    
Frame—replace and/or rebuild     E X
Guards, mud—replace X      
Guards, mud—repair   X    
Plate, skid—replace X      
Plate, skid—repair   X    
Saddle—replace X      
Saddle—repair   X    
Saddle—rebuild     X  
Springs, saddle post—replace X      
Tank, fuel—replace X      
Tank, fuel—repair   X    
Tank, oil—replace X      
Tank, oil—repair   X    
 
SUSPENSION (FRONT)  
Bars, handle—replace X      
Bars, handle—repair   X    
Damper, steering—replace X      
Drum, brake—replace   X    
Fork, front assembly—replace X      
Fork, front assembly—repair   X    
Fork, front assembly—rebuild     X  
Fork, spring—replace X      
Fork, spring—repair   X    
Fork, spring—rebuild     X  
Plate, rocker—replace X      
Plate, rocker—repair   X    
Shoe assembly, brake—service and/or replace X      
Shoe assembly, brake—repair (reline)   X    
Springs, cushion and rebound—replace X      
 
SUSPENSION (REAR)  
Chains, all—replace and/or repair X      
Drum, brake, rear—replace   X    
Guards, chains—replace X      
Guards, chains—repair   X    
Shoe assemblies, brake—service and/or replace X      
Shoe assemblies, brake—repair (reline)   X    
Sprocket, rear—replace   X    
Wheels—replace X      
Wheels—repair   X    
Wheels—rebuild     E X
 
TIRES  
Casings and tubes—replace X      
Casings—repair     E X
Tubes, inner—repair X      
 
TRANSMISSION  
Spring, kick starter—replace X      
Sprocket, transmission countershaft—replace X      
Starter, kick—replace X      
Starter, kick—repair   X    
Transmission—replace *4 X    
Transmission—repair   X    
Transmission—rebuild     E X
 
VEHICLE ASSEMBLY  
Motorcycle—service X      
Motorcycle—rebuild (with serviceable unit assemblies)     X E

4 The second echelon is authorized to remove and reinstall items marked by an asterisk. However, when it is necessary to replace an item marked by an asterisk with a new or rebuilt part, subassembly or unit assembly, the assembly marked by an asterisk may be removed from the vehicle by the second echelon only after authority has been obtained from a higher echelon of maintenance.