The A & I Products OK6512 Major Overhaul Kit is designed for comprehensive engine restoration. This kit includes all necessary components for a complete overhaul, ensuring optimal performance and longevity. Made from high-quality materials, each part meets industry standards for reliability. Ideal for various engine applications, this overhaul kit is essential for anyone looking to restore their engine to peak condition.
Major John Deere Overhaul Kit for engine 6.531T Diesel, 500 Series. 6 Cyl. with Block #: R48260, R72129, R80401. Rod #: R48315, R53287, R58883, R66926. Standard Bore: 4.75 (121mm), Piston Pin: 1.875 (47.6mm). Kit includes: Piston Liner Kit, Main Bearing, Thrust Bearing, Thrust Washer Set, Connecting Rod Bearing, Front Crankshaft Seal, Rear Seal, Connecting Rod Bushing, Connecting Rod Bolt, and Camshaft Bearing. Fits John Deere models: 644B, 646B, 770, 770A, and 772A.
• 6 CYL. BLOCK: R48260, R72129, R80401, ROD#: R48315, R53287, R58883, R66926; PISTON MARKED: AR66347
• Bore: 4.75" 121mm, Pin: 1.875", 47.6mm
| Engine Overhaul Kits > 6.531T Diesel, 500 Series |
| John Deere INDUSTRIAL/CONSTRUCTION: 644B (6.531T 6CYL ENG) |
| John Deere INDUSTRIAL/CONSTRUCTION: 646B (6.531T 6CYL ENG) |
| John Deere INDUSTRIAL/CONSTRUCTION: 770 (6.531T 6CYL ENG) |
| John Deere INDUSTRIAL/CONSTRUCTION: 770A (6.531T 6CYL ENG) |
| John Deere INDUSTRIAL/CONSTRUCTION: 772A (6.531T 6CYL ENG) |
next >> | Group Description | Component | Size / Desc | Qty |
| Piston Liner Kit | A-PLK512 | | 6.00 |
| Bearing, Main | A-AR101266 | STD | 6.00 |
| A-AR104568 | .010 | 6.00 |
| A-AR104569 | .020 | 6.00 |
| A-AR104570 | .030 | 6.00 |
| Bearing, Thrust | A-AR101267 | STD | 1.00 |
| A-AR104564 | .010 | 1.00 |
| A-AR104565 | .020 | 1.00 |
| A-AR104566 | .030 | 1.00 |
| Washer Set, Thrust | A-AR89622 | STD | 1.00 |
| A-AR89971 | .007 | 1.00 |
| Bearing, Conn Rod | A-AR53020 | STD | 6.00 |
| A-AR57208 | .010 | 6.00 |
| A-AR57209 | .020 | 6.00 |
| A-AR57210 | .030 | 6.00 |
| Seal, Front Crankshaft | A-AR49025 | | 1.00 |
| Seal, Rear Crankshaft | A-RE13310 | | 1.00 |
| Bushing, Conn Rod | A-R76783 | | 6.00 |
| Bolt, Conn Rod | A-R66453 | | 12.00 |
| Gasket, Lower Set | A-CS3903 | | 1.00 |
| Item Number | Description | Qty |
| A-AR53226 | Rings, Piston | 6 |
| A-E1343FN | Retainer, Piston Pin | 12 |
| A-IK6512 | IN FRAME OH KIT | 1 |
| A-RE17050 | Gasket, OH Set w/o Seals | 1 |
| A-R35431 | Lock, Valve | 12 |
| A-R48000 | Seal, Pencil Injector | 6 |
| A-R49423 | O-Ring Kit | 6 |
| A-R49569 | Spring, Valve Inner | 12 |
| A-R49571 | Spring, Valve Outer | 12 |
| A-R53192 | Guide, Intake & Exhaust Valve | 12 |
| A-R60746 | Seal, Pencil Injector | 6 |
| A-R78513 | Gasket, Head | 1 |
| A-R81086 | Rotator, Valve | 12 |
| A-R90601 | Valve, Exhaust | 6 |
| A-R90602 | Valve, Intake | 6 |
| A-10152 | Assembly Lube; 8 oz | 1 |
| A-10153 | Assembly Lube; Case of 12-8ozbottles | 1 |
