Operators Manual For Military 621G Scraper

CHAPTER 1. GENERAL INFORMATION, EQUIPMENT DESCRIPTION AND THEORY OF OPERATION
GENERAL INFORMATION
PREPARATION FOR STORAGE OR SHIPMENT
PREPARATION FOR STORAGE OR SHIPMENT CONTINUED
Basic Issue Items (BII) and Additional Authorization List (AAL) Items
Table 1. Exercise Schedule.
Preparation of Equipment for Shipment
LIST OF ABBREVIATIONS/ACRONYMS
EQUIPMENT DESCRIPTION AND DATA
Figure 1. Military 621G Scraper (Left Side).
Figure 2. Military 621G Scraper (Right Side).
EQUIPMENT DATA
EQUIPMENT DATA CONTINUED
THEORY OF OPERATION
Figure 2. Final Drive.
Figure 3. Air and Brake System.
HYDRAULIC SYSTEM
Figure 5. Hydraulic System.
CHAPTER 2. OPERATOR INSTRUCTIONS
DESCRIPTION AND USE OF OPERATOR CONTROLS AND INDICATORS
Figure 1. Main Entry and Exit.
Figure 2. Alternate/Emergency Exit.
Figure 3. Door Handles.
Figure 4. Quad Gauge Module.
Figure 5. Main Display Module.
Figure 6. Tachometer, Speedometer, and Transmission Gear and Direction Indicator.
Figure 7. Indicators.
Figure 8. Switch Panel.
Figure 9. Turn Signals, Tilt/Telescope Adjustment, and Emergency Flashers.
Figure 10. Wrist Rest.
Figure 11. Transmission Control.
OPERATOR CONTROLS AND INDICATORS CONTINUED
Figure 12. Foot Controls.
OPERATOR CONTROLS AND INDICATORS CONTINUED
Figure 13. Seat.
OPERATOR CONTROLS AND INDICATORS CONTINUED
Figure 14. Seat Belt.
Figure 15. Heater and Air Conditioning Controls/Rear Wiper Switch.
Figure 16. Bowl Control.
Figure 17. Ejector Control.
Figure 18. Apron Control Thumb Lever.
Figure 19. Transmission Hold Control Button.
Figure 20. Cushion-Hitch Control Button.
Figure 21. Throttle Lock Control and Park Brake Switch.
Figure 22. Military Light Switch/Front Wiper Switch.
OPERATOR CONTROLS AND INDICATORS CONTINUED
Figure 23. Engine Access Doors and Hood Support Strut.
Figure 24. Tractor Ground Level Shutdown Switch.
Figure 25. 24V Slave Receptacle, Battery Disconnect Switch, Fuel Shutoff Valve, Electric Fuel Priming Pump, and Purge Valve.
OPERATOR CONTROLS AND INDICATORS CONTINUED
Figure 26. Defrost Fan Switch.
Figure 27. Cab Dome Lamp Switch.
Figure 28. Mirrors.
OPERATION UNDER USUAL CONDITIONS
SEAT, SEAT BELT, AND CONTROL ADJUSTMENTS
ENGINE STARTING AND MACHINE WARM-UP
ENGINE STARTING AND MACHINE WARM-UP CONTINUED
ENGINE STARTING AND MACHINE WARM-UP CONTINUED
TRANSMISSION OPERATION
DIFFERENTIAL LOCK OPERATION
MACHINE OPERATION
Stopping Machine
SCRAPER OPERATION
SCRAPER OPERATION CONTINUED
SCRAPER OPERATION
Picking Up Windrows
OPERATION UNDER UNUSUAL CONDITIONS
SLAVE STARTING
OPERATION IN EXTREME COLD
OPERATION IN EXTREME COLD CONTINUED
OPERATION IN MUD OR ON SOFT SURFACES
OPERATION IN SALTWATER AREAS
OPERATION IN SNOW AND ON ICE
RECOVERY AND TOWING
Figure 2. Front Towing Eyes.
Figure 3. Fire Extinguisher.
Figure 4. Tractor Ground Level Shutdown Switch.
Figure 5. Shutoff Valve.
Figure 1. BII Stowage Box.
Figure 2. Decals, Data Plates, and Stencils.
DECALS, DATA PLATES, AND STENCILS
Figure 3. Decals, Data Plates, and Stencils.
DECALS, DATA PLATES, AND STENCILS CONTINUED
Figure 4. Decals, Data Plates, and Stencils.
DECALS, DATA PLATES, AND STENCILS CONTINUED
Figure 5. Decals, Data Plates, and Stencils.
DECALS, DATA PLATES, AND STENCILS CONTINUED
Figure 6. Decals, Data Plates, and Stencils.
DECALS, DATA PLATES, AND STENCILS CONTINUED
Figure 7. Decals, Data Plates, and Stencils.
Figure 8. Shipping Data Plate.
Figure 9. Lubrication Data Plate.
CHAPTER 3. TROUBLESHOOTING PROCEDURES
TROUBLESHOOTING INTRODUCTION
TROUBLESHOOTING SYMPTOM INDEX
TROUBLESHOOTING PROCEDURES
Table 1. Operator Troubleshooting.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Figure 1. Brake Actuator.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
Table 1. Operator Troubleshooting - Continued.
CHAPTER 4. PMCS MAINTENANCE INSTRUCTIONS
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION
Table 1. Maintenance Intervals, Symbols, and Manhours.
GENERAL PMCS PROCEDURES
LUBRICATION PROCEDURES
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
Table 1. Preventive Maintenance Checks and Services (PMCS).
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 3. Differential.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 5. Bowl and Cutting Edge Flood Lamps.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 8. Rear Wheel and Tire.
Figure 9. Ejector Rollers.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 10. Transmission and Differential Sight Gauge/Oil Fill.
Figure 11. Front Wheel and Tire.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 12. Hydraulic Tank and Sight Gauge.
Figure 13. Engine Air Precleaner.
Figure 14. Exhaust Stack.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 15. Ether Start Aid Cylinder and Protective Cap.
Figure 16. Window Washer Fluid Tank.
Figure 17. Air Filter Service Indicator.
Figure 18. NATO Slave Receptacle.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 19. Fuel Filter Water and Sediment Drain.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 20. Radiator and Drive Belts.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 21. Engine Oil Level Gauge (Dipstick).
Figure 22. Engine Oil Level Check.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 23. Front Air System Tanks Drain Valves.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 24. Front Wheel and Tire.
Figure 25. Hitch Area.
Figure 26. Differential.
Figure 27. Bowl and Cutting Edge Flood Lamps.
Figure 28. Scraper Bowl Area.
Figure 29. Ejector Rollers.
Figure 30. Rear Wheel and Tire.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 31. Rear Air Tank System Drain Valve.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 33. Transmission and Differential Sight Gauge/Oil Fill.
Figure 34. Front Wheel and Tire.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 35. Hydraulic Tank and Sight Gauge.
Figure 36. Engine Air Precleaner.
Figure 37. Exhaust Stack.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 38. Ether Start Aid Cylinder and Protective Cap.
Figure 39. Washer Fluid Tank.
Figure 40. Air Filter Service Indicator.
Figure 41. NATO Slave Receptacle.
Figure 42. Engine Oil Level Gauge (Dipstick).
Figure 43. Radiator and Drive Belts.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 44. Fuel Tank Fill Cap and Neck.
Figure 45. Solargizer.
Figure 46. 24 Hitch Lubrication Fittings.
Figure 47. Five Hitch Lubrication Fittings.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued.
Figure 48. Exterior Cab Filter.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 49. Battery Compartment.
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
Figure 51. Brake Camshaft Bearing Lubrication (Right Front Shown).
Table 1. Preventive Maintenance Checks and Services (PMCS) Continued
CHAPTER 5. MAINTENANCE INSTRUCTIONS
BOWL AND CUTTING EDGE FLOOD LAMP BULB REPLACEMENT
Figure 2. Flood Lamp Bulb.
Figure 3. Flood Lamp.
BLOCKING THE APRON
Figure 2. Inboard Pin Mount.
Figure 4. Inboard Pin Mount.
DOME LAMP BULB REPLACEMENT
ENGINE PRIMARY AIR FILTER ELEMENT MAINTENANCE
Figure 1. Engine Air Filter Assembly Cover.
Figure 2. Primary Air Filter Element.
CLEANING AND INSPECTION
Figure 3. Primary Air Filter Element.
Figure 4. Engine Air Filter Service Indicator.
ETHER STARTING AID CYLINDER REPLACEMENT
Figure 1. Ether Starting Aid Cylinder.
Figure 2. Filter and Gasket.
Figure 3. Filter and Gasket.
Figure 4. Ether Starting Aid Cylinder.
FUSE AND CIRCUIT BREAKER MAINTENANCE
Figure 2. Fuse, Circuit Breaker, and Relay Identification.
Table 1. Fuse, Circuit Breaker, and Relay Identification Key.
Table 1. Fuse, Circuit Breaker, and Relay Identification Key - Continued.
Figure 3. A/C System Circuit Breaker.
Figure 4. Solargizer Fuse and Spare.
Figure 5. Solargizer Fuse and Spare.
Figure 6. Fuse Panel Access.
HEADLAMP BULB REPLACEMENT
Figure 2. Headlamp Bulb.
Figure 3. Headlamp Cover.
WINDOW WIPER BLADE REPLACEMENT
PREPARATION FOR TRANSPORT
RO/RO Regulations
Load and Secure Machine on Flatcar
Unload Machine from Flatcar
Figure 1. Military 621G Scraper on M870 MHET - Side View.
Unload Machine from Trailer
CHAPTER 6. SUPPORTING INFORMATION
REFERENCES
REFERENCES - Continued
COMPONENTS OF END ITEM (COEI) AND BASIC ISSUE ITEMS (BII) LISTS
Table 2. Basic Issue Items (BII) List.
Table 2. Basic Issue Items (BII) List - Continued.
EXPENDABLE AND DURABLE ITEMS LIST
Table 1. Expendable and Durable Items List - Continued.
Table 1. Expendable and Durable Items List - Continued.
Table 1. Expendable and Durable Items List - Continued.

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