Common Information

TASK 79-22-41-200-402 Oil Scavenge Pump - Related Parts - Examine The Driven Gear, Inspection-002

Effectivity

FIG/ITEM	PART NO.
01-170	4P7010

General

CAUTION

GEARS MUST BE REPLACED IN MATCHED SETS IF EITHER ONE REQUIRES REPLACEMENT.

This TASK gives the procedure for the inspection of the driven gear. For the other parts of the oil scavenge pump assembly, refer to Inspection-000 TASK 79-22-41-200-400.

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

The policy that is necessary for inspection is given in SPM TASK 70-20-01-200-501.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

References

Refer to the SPM for data on these items.

Definitions of Damage, SPM TASK 70-02-02-350-501.

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501.

Inspection of Parts, SPM TASK 70-20-00-200-501.

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Method of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Procedure

1. SUBTASK 79-22-41-240-051 Do a Crack Test on the Driven Gear (Magnetic)

   1. Clean the part. Refer to Cleaning-000 TASK 79-22-41-100-400.

   2. Do the test for cracks on the part that is given below.

      PART IDENT	PROCEDURE	CURRENT/INSPECT	TASK/SUBTASK
      Driven gear	TB	650 Amp	Refer to SPM TASK 70-24-01-240-501 SUBTASK 70-24-01-240-011
      	Coil	3500A/T	Refer to SPM TASK 70-24-01-240-501 SUBTASK 70-24-01-240-014

      1. Cracked

         1. Reject

2. SUBTASK 79-22-41-220-059 Examine the Driven Gear Tip of Tooth at Location 4745

   1. Refer to Figure.

   2. Damage on tip of tooth

      1. Remove the sharp edges or high spots which could damage the mating gear teeth surfaces.

         1. Repair, VRS5336 (Repair-005) TASK 79-22-41-300-005.

   3. Diameter

      1. Between 1.7007 and 1.6998 in. (43.2 and 43.175 mm).

         1. Accept

      2. Less than 1.6998 in. (43.175 mm).

         1. Reject

3. SUBTASK 79-22-41-220-060 Examine the Driven Gear Teeth on the Face Surface at Location 1

   1. Refer to Figure.

   2. Scored

      1. Lightly remove raised material. A 32 micro-inches (0.8 micro-meter) finish is required.

         1. Repair, VRS5336 (Repair-005) TASK 79-22-41-300-005.

      2. Chipped, flaking or fretting.

         1. Reject

   3. Damage and obvious signs of wear

      1. Measure the dimension over diametrically opposed 0.315 in. (8 mm) diameter pins.

         1. Between 1.877 and 1.8679 in (47.676 and 47.444 mm).

            1. Accept

         2. Less than 1.8679 in (47.444 mm).

            1. Reject

4. SUBTASK 79-22-41-220-061 Examine the Driven Gear Teeth on End Surface at Location 2

   1. Refer to Figure.

   2. Scored

      1. Not discernible with 0.04 in. (1 mm) radius spherical-end.

         1. Accept

      2. Remove raised material with a fine stone.

         1. Repair, VRS5336 (Repair-005) TASK 79-22-41-300-005.

5. SUBTASK 79-22-41-220-062 Examine the Driven Gear Rear and Front Journals at Location 4717 and 4721

   1. Refer to Figure.

   2. Scored

      1. Remove raised metal with a fine stone. Scores must have a circumferential direction. A 10 micro-inches (0.25 micro-meter) finish is required.

         1. Repair, VRS5336 (Repair-005) TASK 79-22-41-300-005.

6. SUBTASK 79-22-41-220-063 Examine the Driven Gear Front Bush Journal at Location 4717

   1. Refer to Figure.

   2. Diameter

      1. Between 0.8661 and 0.8653 in. (22 and 21.979 mm).

         1. Accept

      2. Less than 0.8653 in. (21.979 mm).

         1. Reject

   3. Concentricity

      1. In 0.0004 in. (0.01 mm) in relation to surface A.

         1. Accept

      2. More than Step.

         1. Reject

7. SUBTASK 79-22-41-220-064 Examine the Driven Gear Rear Bush Journal at Location 4721

   1. Refer to Figure.

   2. Diameter

      1. Between 0.8661 and 0.8653 in. (22 and 21.979 mm).

         1. Accept

      2. Less than 0.8653 in. (21.979 mm).

         1. Reject

Figure: Locations on the Driven Gear

Locations on the Driven Gear