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

4-26
FIGURE 4-22. PERMOLD CRANKCASE ASSEMBLY COMPLETE.
1. Gauge and Cap Assy., Oil 27. Bushing, Flanged 53. Washer, Lock
2. Screw 28. Gasket 54. Washer, Plain
3. Washer, Lock 29. Nut, Flanged 55. Nut, Plain, Hex
4. Washer, Plain 30. Washer, Plain 56. Washer, Lock
5. Tube, Oil Filler Assy. 31. Bolt 57. Washer, Plain
6. Gasket 32. Washer, Lock 58. Bolt, Thru
7. “O” ring 33. Washer, Plain 59. Bolt, Thru
8. Nut, Plain, Hex 34. Bolt 60. Bolt, Thru
9. Washer, Lock 35. Bolt 61. Bolt, Thru
10. Washer, Plain 36. Washer, Lock 62. "0" Ring
11. Bolt 37. Washer, Plain 63. Dowel
12. Eye, Engine Lifting 38. Bolt 64. Bushing, Idler Gear
13. Spacer 39. Nut, Marsden, Lock 65. Bearing, Needle
14. Nut, Plain, Hex 40. Washer, Plain 66. Plug, Machine Thrd.
15. Washer, Lock 41. Bolt 67. Gasket, Copper
16. Washer, Plain 42. Nut, Marsden, Lock 68. "0" Rings
17. Spacer, Gov. Pad 43. Washer, Plain 69. Nozzle, Squirt
18. Cover, Gov. Pad 44. Nut, Plain, Hex 70. Plug, Pipe
19. Gasket 45. Washer, Lock 71. Plug, Pipe
20. Nut, Plain, Hex 46. Washer, Plain 72. Plug, Pipe
21. Washer, Lock 47. “O” ring 73. Screw, Drive
22. Washer, Plain 48. Bolt 74. Plate, Identification
23. Cover, Camshaft Hole 49. Nut, Plain, Hex 75. Crankcase, 1-3-5 Side
24. Gasket 50. Washer, Lock 76. Crankcase, 2-4-6 Side
25. Nut, Plain, Hex 51. Washer, Plain 77. Plug, Pipe
26. Washer, Plain 52. Nut, Plain, Hex