Operating instructions
Table Of Contents
- 1 Introduction
- 2 General Description
- 3 Special Tools and Equipment
- 4 Disassembly
- 5 Cleaning, Repair and Replacement
- 6 Inspection
- Definitions
- Magnetic Particle Inspection
- Critical New Part Dimensions
- Fluorescent Particle Inspection
- Dimensional Inspection
- Protective Coatings
- Crankcase Inspection
- Crankshaft Inspection
- Camshaft Inspection
- Connecting Rod Inspection
- Gear Inspection
- Piston Inspection
- Cylinder Inspection
- Inspection Chart
- Crankcase Stud Heights
- Mag Particle Inspection Procedures
- Table of Limits
- Torque Specifications
- General Torques
- Table of Limits Chart
- 7 Assembly of Subassemblies
- 8 Final Assembly and Test
- 9 IO-520-M
- 10 IO-520-BB, CB and MB

4-28
FIGURE 4-24. CRANKSHAFT GROUP (TYPICAL OF SANDCAST MODELS
1. Washer, Thrust 19. Nut, Marsden
2. Bearing, Crankshaft, Main 20. Collar, 1-3-5 Side
3. Gear, Idler 21. Collar, 2-4-6 Side
4. Bushing, Idler Gear 22. Sleeve, Oil Transfer
5. Pin, Cotter 23. "0" Ring
6. Nut, Slotted 24. Pin, Roll
7. Bolt, Special 25. Stud
8. Cap 26. Screw
9. Rod, Connecting 27. Gear, Crankshaft
10. Bearing 28. Spring
11. Bushing 29. Reinforcing Ring
12. Ring, Retaining 30. Seal
13. Plate, Counterweight 31. Bushing
14. Pin, Counterweight 32. Dowel
15. Pin, Counterweight 33. Plug, Oil Control
16. Pin, Counterweight 34. Crankshaft Group
17. Counterweight, Crankshaft
18. Bushing, Counterweight