![John Deere 200CLC 230CLC 270CLC Repair Manual [Excavator]](https://youfixthis.com/wp-content/uploads/2012/02/Manual_Download-300x300.jpg)
Part of the John Deere Repair Manuals.
This is the full John Deere factory technical repair manual for the 770A, 770AH, 772A and 772AH motor graders, the same shop-level book a dealer tech pulls off the shelf. It opens with general information and lubrication, then works through the running gear front to back: wheels, axles and the suspension system, the power shift transmission and torque converter, the 6531 cu. in. diesel engine, transfer drive and steering. Brakes get their own two sections, service and parking-emergency, with full teardown and adjustment. The electrical section covers batteries, charging, starting and wiring, and the frame, cab and sheet metal sections walk the structure and operator's station. The back half is where a grader manual earns its keep: the main hydraulic system, the grading device (moldboard, circle and drawbar), ground conditioning tools like the scarifier and ripper, the Automatic Blade Control (ABC) system, and a dedicated system testing section for chasing hydraulic and electrical faults with real test points instead of guesswork.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 17-80 | Specifications, Predelivery, Delivery and After-Sale Services, Lubrication |
| Wheels, Axles and Suspension System | 81-202 | Wheel Bearings, Tire and Rim Service, Axle Housings, Oscillation and Suspension Repair |
| Transmission and Torque Converter | 203-282 | Power Shift Clutch Packs, Controls Linkage, Gears and Shafts, Torque Converter Service |
| 6531 Cu. in. Diesel Engine | 283-446 | Removal and Installation, Crankshaft and Main Bearings, Cylinder Head, Fuel Injection, Turbocharger |
| Engine Auxiliary Systems | 447-464 | Cooling System, Air Intake and Exhaust, Engine Mounting, Fuel Tank and Lines |
| Transfer Drive and Steering System | 465-516 | Transfer Case, Tandem Drive Chains, Power Steering Pump and Valve, Steering Cylinders |
| Service Brakes and Parking-Emergency Brakes | 517-552 | Brake Disc and Caliper Service, Hydraulic Brake Circuit, Parking Brake Linkage and Adjustment |
| Equipment Attaching | 553-556 | Drawbar Mounting, Blade Attaching Points, Front-Mounted Attachment Linkage |
| Electrical Systems | 557-634 | Batteries, Starting Circuit, Alternator and Regulator, Lighting, Wiring Harness and Schematics |
| Frame, Chassis and Supporting Structure | 635-648 | Main Frame Inspection, Articulation Hitch, Bottom Guards, Bumpers |
| Operator's Station | 649-706 | Cab Enclosure, Seat and Seat Belt, Heating and Air Conditioning, Controls and Instrument Panel |
| Sheet Metal, Safety and Convenience | 707-726 | Hoods and Panels, Guards and Shields, Safety Decals, Convenience Accessories |
| Main Hydraulic System | 727-812 | Hydraulic Pump and Manifold, Circle Drive Circuit, Blade Lift and Tilt Circuits, Filters and Reservoir |
| Grading Device | 813-908 | Moldboard, Circle Turn Mechanism, Drawbar, Blade Side Shift and Tip |
| Ground Conditioning Tools | 909-942 | Scarifier, Ripper, Front-Mounted Tool Linkage and Hydraulics |
| Automatic Blade Control (Abc) and System Testing | 943-1330 | Abc Sensors and Solenoid Valves, Grade Control Setup, Hydraulic and Electrical System Test Points |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 770A, 770AH, 772A, 772AH | ||
| Engine Gross Power (SAE) | 160 hp (119 kW) | p. 17 |
| Engine Net Power (SAE) | 150 hp (112 kW) | p. 17 |
| Engine Bore and Stroke | 4.56 x 4.75 in. (116 x 121 mm) | p. 17 |
| Engine Piston Displacement | 466 cu. in. (7.638 L) | p. 17 |
| Engine Compression Ratio | 14.9 to 1 | p. 17 |
| Engine Maximum Torque | 465 lb-ft (630 Nm) @ 1,300 rpm | p. 17 |
| Fuel Tank Capacity | 70 gal. (265.0 L) | p. 18 |
| Cooling System Capacity | 10 gal. (38 L) | p. 18 |
| Front Wheel Retaining Cap Screw Torque | 130 lb-ft (177 Nm) | p. 38 |
| JD770-A / JD772-A rear wheels | ||
| Rear Wheel Retaining Cap Screw Torque | 300 lb-ft (407 Nm) | p. 39 |
