- OPERATION ORGANIZATIONAL MANNTENANCE AND ORDNANCE FIELD AND DEPOT MAINTENANCE 12-TON,4-WHEEL WRECKERLOW-BED SEMITRAILERS
- Operator 's Organizational, and Field Maintenance Manual
- Scope
- Scope (Cont)
- Scope (Cont)
- Operator 's Organizational, Direct Support and General Support Maintenance Manual
- Administrative Storage
- Component of End Item
- Expendable Consumable Maintenance Supplies and Materials
- Expendable Consumable Maintenance Supplies and Materials (Cont)
- Basic Issue Items List and Items Troop Installed or Authorized List
- Section II. Basic Issue Items List
- Operator 's Organizational, and Field Maintenance Manual
- Maintenance allocation
- Break-In Procedures
- Section III. Preventive-Maintenance Sevice
- Outline
- Cleaning
- Daily Preventive-Maintenance Services
- general Procedures for Second Echelon
- general Procedures for Second Echelon (Cont)
- Table III. (Superseded) Preventive Maintenance Checks and Services
- Section IV. Troubleshooting
- Table III.1. (Added) Troubleshooting
- Table III.1. (Added) Troubleshooting (Cont)
- Table III.1. (Added) Troubleshooting (Cont)
- Table III.1. (Added) Troubleshooting (Cont)
- Table III.1. (Added) Troubleshooting (Cont)
- Table III.1. (Added) Troubleshooting (Cont)
- Appendix I: (Supereseded) References
- Appenidx II: (Added) Maintenance Allocation Chart
- Maintenance Allocation Chart
- Maintenance Allocation Chart (Cont)
- Maintenance Allocation Chart (Cont)
- Maintenance Allocation Chart (Cont)
- Appendix III: (Added) Basic Issue Items List
- Section II. Basic Issue Items List
- Table of Contents
- Table of Contents (Cont)
- Chapter 1. INTRODUCTION
- Figure 1. Wrecker Low-bed Semitrailer M270A1-Left-front view
- Figure 2. Wrecker Low-bed Semitrailer M270-Left-front view
- Figure 3. Wrecker Low-bed Semitrailer M269-Left-front view
- Figure 4. Wrecker Low-bed Semitrailer M270A1-right-rear view
- Figure 5. Wrecker Low-bed Semitrailer M270-right-rear view
- Figure 6. Wrecker Low-bed Semitrailer M269-right-rear view
- Figure 7. Wrecker Low-bed Semitrailer M270A1-Top view
- Figure 8. Wrecker Low-bed Semitrailer M269-Top view
- Forms , Recordsr and Reports
- Section Il. DESCRIPTION AND DATA
- Differences Among Models
- Taillights.
- Chassis Frame and Body Frame
- Deck
- Suspension
- Figure 9. Suspension-semitrailer M270A1
- Operation of Semitrailer Brakes.
- Figure 10. Sechematic Diagram of Brake System-semitrailer M270A1
- Figure 11. Sechematic Diagram of Brake System-semitrailer M270 amd M269
- Emergency Relay Valve Assembly.
- Air Filters.
- Types of Brakes.
- Units of the Brakc Systcms.
- Wheel Brake Mechanisms.
- Figure 16. Wheel brake mechanisn-semitrailers M270 and M269.
- Brake Hydraulic Master Cylinders and Air Chambers (Semitrailer M270A1)
- Hubs and Brake Drums
- Brake Drums.
- Wheels and Tires
- Landing Gear (Supports)
- Stowage Box, Stowage Compartment, and Tool Boxes
- Tool Box (fig. 23).
- Lights and Wiring
- Figure 24. Wiring Diagram-Semitrailer M270A1
- Figure 25. Wiring Diagram-Semitrailer M270 amd M269
- Data and Service Plates
- Tabulated Data
- Tabulated Data (Cont)
- Tabulated Data (Cont)
- Chapter 2. OPERATING INSTRUCTIONS
- Break-In Procedures
- Kingpin
- Intervehicular Cable Receptacles and Sockets
- Landing Gear (Supports) Operating Handcrank
- Operation Under Usual Conditions
- Operating Towing Vehicle and Semitrailer.
- Uncoupling Semitrailer From Towing Vehicle.
- Section Ill. OPERATION UNDER UNUSUAL CONDITIONS
- Extreme-Cold Weather Conditions.
- Extreme - cold Weather Operation.
- Operation on Unusual Terrain and Fording
- Mud and Snow
- Chapter 3. ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
- Section Il. LUBRICATION AND PAINTING
- Figure 31. Special tools for organizational maintenance.
- Reports and Records
- Figure 32. Lubrication Order
- Lubrication Order
- Figure 33. Lucalized Lubrication Points (A-H)
- Extreme - Cold Weather.
- Painting
- Cleaning
- Preventive Maintenance by Driver or Operator
- Table II. Driver's or Operator's Preventive Maintenance Services
- Table II. Driver's or Operator's Preventive Maintenance Services (Cont)
- Preventive Maintenance by Organizational Maintenance
- Special Conditions.
- Table III. Organizational Mechanics or Maintenance Crews C and D
- Table III. Organizational Mechanics or Maintenance Crews C and D (cont)
- Section IV. TROUBLESHOOTING
- Brakes
- Slow Brake Application or Slow Release.
- Suspension
- Landing Gear
- Lights
- Body and Equipment
- Remove split lock ring.
- Installation of Tire On Wheel.
- Hub and Brake Drum
- Installation of Hub and Brake Drum on Axle.
- Adjust bearings .
- Install wheels on hub.
- Section VI. SUSPENSION
- Spring Seat
- Installation of Oil Seal and Inner Cone and Roller Bearing Assembly.
- Installation of Spring Seat.
- Section VII. BRAKES
- Figure 42. Minor adjustment of brakes-semitrailers M270 and M269.
- Major adjustment.
- Figure 44. Making brake major adjustment at anchor pins-semitrailers M270 and M269.
- Internal Brake Mechanisms (Semitrailers M270 and M269)
- Internal Brake Mechanisms (Semitrailer M270A1)
- Emergency Relay Valve
- Leakage Tests.
- Semitrailers M270 and M269 (fig. 12).
- Brake Air Chamber and Hydraulic Master Cylinder
- Removal.
- Brake Air Chamber (Semitrailers M270 and M269)
- Air and Hydraulic Hose, Tubing, and Fittings, Test and Check
- Air-Over-Hydraulic Brake System (Semitrailer M270A1)
- Air Hose Coupling
- Figure 46. Operating handcrank assembly and crank shaft extension bracket assembly-installed.
- Landing Gear Installation
- Spare Wheel and Tire Carrier
- Section IX. ELECTRICAL SYSTEM
- Taillights
- Removal.
- Clearance Lights
- Directional Lights (Semitrailers M270 and M269)
- Section X. FRAME, BODY, AND EQUIPMENT
- Stowage Box (Semitrailer M270A1).
- Chapter 4. FIELD AND DEPOT MAINTENANCE INSTRUCTIONS
- Section II. REPAIR AND REBUILD OF WHEELS, HUBS, AND BRAKE DRUMS
- Hubs and Brake Drums
- Figure 51. Hubs and Brake Drums, Brakes, Axle, and Parts-Semitrailer M270A1-Partial Exploded View
- Spring Seat Bearings
- Figure 52. Hub, brake drum, adapter, and parts-semitrailer M270A1- exploded view.
- Removal.
- Cleaning.
- Inspection and Repair.
- Installation.
- Springs
- Cleaning.
- Figure 56. Spring 7979217-assembled view.
- Spring Bearing Plates and Spring Guide Bracket Side
- Figure 57. Torque rods, spring guide brackets, and attaching parts-exploded view.
- Torque Rods
- Installation.
- Tube, with Brackets, Assembly (Trunnion Cross Tube)
- Section IV. REPAIR AND REBUILD OF BRAKES AND BRAKE SYSTEM COMPONENTS
- Figure 59. Internal Brake Meenanism Semitrailer M270 and M269-Exploded View
- Rebuild of brake shoes.
- Installation
- Emergency Relay Valve
- Section V. REBUILD OF LANDING GEAR, STOWAGE BOX, STOWAGE COMPARTMENT, AND TIRE CARRIER
- Inspection and Repair.
- Figure 61. Landing Gear-Semitrailer M270A1-Exploded View
- Assembly of Landing Gear Left Leg Assembly.
- Figure 62. Landing Gear Left Leg Assembly 8700957 - Exploded View
- Disassembly of Landing Gear Right Leg Assembly.
- Figure 63. Landing Gar Right Leg Assembly-partial Exploded View
- Disassembly of Landing Gear Right Leg Assembly. (Cont)
- Disassembly of Landing Gear Right Leg Assembly. (Cont)
- Assembly of Landing Gear Right Leg Assembly.
- Assembly of Landing Gear Right Leg Assembly. (cont)
- Handcrank Assembly
- Stowage Box and Stowage Compartment
- Spare Wheel and Tire Carrier
- Figure 66. Spare Wheel and Tire Carrier - Exploded View
- Chock Blocks
- Section VI. REBUILD OF ELECTRICAL SYSTEM
- Figure 67. Service Tail and Stop and Blackout Tailight 7411002-Partial Exploded View
- Blackout Stoplight (fig. 68).
- Figure 68. Blackout Stoplight Assembly 7527682-Partial Exploded View
- Directional Light (Semitrailers M270 and M269)
- Clearance Lights (fig. 70).
- Figure 70. Clearance Light Assembly-Exploded View
- Section VIl. REPAIR AND REBUILD OF FRAME
- Section Vlll. REPAIR AND REBUILD OF DECK AND STAKES
- Axle
- Figure 71. Repair and rebuild standard points of measurement.
- Chapter 5. SHIPMENT AND STORAGE AND DESTRUCTION OF MATERIEL TO PREVENT ENEMY USE
- Receiving Inspections.
- Loading the Semitrailers on Railroad Flatcars
- Figure 72. Balocking The Semitrailers on Railroad Flatcars
- Section Il. DESTRUCTION OF MATERIEL TO PREVENT ENEMY USE
- General
- Method No. 1 Destruction by Demolition
- Method No. 2Destruction by Burning
- Method No. 3-Destruction by Gunfire
- Appendix. REFERENCES
- Forms
- Other Publications
- Other Publications (Cont)
- Other Publications (Cont)
- INDEX
- INDEX (Cont)
- INDEX (Cont)
- INDEX (Cont)
- INDEX (Cont)
- INDEX (Cont)
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- TM-9-8240
- By Order of the Secretary of the Army
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- By Order of the Secretary of the Army
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