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

1-3
1-8. OIL SUPPLY AND MEASUREMENT.
1-9. The capacity of the oil sump is 12 U.S. quarts.
The oil filler cap is attached over the oil filler neck
on top of the left crankcase. The oil sump is
equipped with an oil level gauge notched and
stamped with numerals representing quarts.
1-10. OIL CONSUMPTION.
1-11. When operated on a rigid test stand at cruise
power settings and operating within specified limits
oil consumption shall not exceed 1 quart per hour
and one –half.
FIGURE 1-1. THREE-QUARTER RIGHT FRONT VIEW OF THE IO-520-A,E,F & K. (SANDCAST CASE)
FIGURE 1-2. THREE-QUARTER REAR VIEW OF THE IO-520-A & F. (SANDCAST CASE)