CHAPTER 3. AVIATION UNIT MAINTENANCE INSTRUCTIONS

TM 55-4920-415-13&P

CHAPTER 3

AVIATION UNIT MAINTENANCE INSTRUCTIONS

SECTION I. PREPARATION FOR INSTALLATION, STORAGE AND SHIPMENT

3-1. Unpacking Unit . Remove wood box from around

3-3. Preparation of Unit for Shipment . In addition to

the gyro tester being careful not to damage unit.

following the steps in paragraph 3-2, secure the gyro

tester in a wood crate. Preservation, packaging, and

3-2. Preparation of Unit for Storage.

marking requirements for shipment must be in

a. Position the fork (7) in the vertical position and

accordance with the instructions contained in Figure 4-1.

the gimbal ring (6) in a plane parallel to the

ground.

b. Wrap the gyro tester in a moisture barrier

material (Item 1, Table 1-1).

SECTION II. INSPECTION AND SERVICING OF NEW EQUIPMENT

3-6. Lubrication.

3-4. Inspection Requirements.

a. Table 3-1 contains instructions on the types of

lubricants that are satisfactory depending upon

a. Follow the before-operation services given in

the temperatures and on the intervals for

replacement.

b. Perform a complete visual inspection of the

gyro tester for broken wires, corroded terminals

and cracked or loose parts.

3-5. Servicing. The gyro tester is lubricated and ready

for operation.

Table 3-1: Lubrication Chart

Lubricants

Expected Temperatures

Intervals

-50to +40F

Above +32F

GO-LUBRICANT, Gear Universal

GOS-LUBRICANT, Gear Universal

Sub-zero Gear housing

GO 90

GOS

1 year

GAA-GREASE, Automotive and artillery

Drive motor bearings

All temperatures

1 year

3-1