Accessory Drive Replacement

TM 9-2320-363-34-1 · Chapter 3 — Power Package Maintenance

This task covers: a. Removal b. Cleaning c. Inspection d. Installation

Tools and Special Equipment:                         References:
Shop Equipment, SC 4910-95-CL-A31                    TM 9-2320-363-20
Tool Kit, SC 5180-90-CL-N05
                                                     Equipment Condition:
Materials/Parts:
                                                     Reference              Condition Description
Ring, Seal               P/N 8929253
                                                     TM 9-2320-363-20       Alternator Belt Removed
Oil, Lubricating         Appendix B, Item 37

                                               NOTE
             If necessary, tap accessory drive with soft-nosed mallet to aid in removal.

1.    REMOVE FIVE BOLTS (1) AND ACCESSORY DRIVE (2) FROM GEAR CASE COVER (3).
2.    REMOVE AND DISCARD SEAL RING (4) FROM ACCESSORY DRIVE (2).

Use general cleaning methods to clean all parts (page 2-30).

Inspect all parts for wear or damage.

LUBRICATE NEW SEAL RING (1) WITH CLEAN ENGINE LUBRICATING OIL AND INSTALL SEAL RING (1) IN GROOVE ON ACCESSORY DRIVE (2).

Install accessory drive with word UP cast into housing in 12 o’clock position.

INSTALL ACCESSORY DRIVE (2) ON GEAR CASE COVER (3) ENGAGING ACCESSORY DRIVE GEAR (4) WITH BULL GEAR (5). ALINE BOLT HOLES OF ACCESSORY DRIVE (2) AND GEAR CASE COVER (3). PRESS ACCESSORY DRIVE (2) INTO PLACE AND INSTALL FIVE BOLTS (6).

4. TIGHTEN FIVE BOLTS TO 22-28 LB-FT (30-38 N.m) IN PATTERN SHOWN.

5. USE DIAL INDICATOR WITH CLAMP BASE TO MEASURE GEAR LASH BETWEEN ACCESSORY DRIVE GEAR AND BULL GEAR. POSITION DIAL INDICATOR TO READ BETWEEN SCRIBED LINES (7) ON GEAR LASH CHECKER (8). GEAR LASH SHOULD BE 0.001-0.010 IN. (0.025-0.254 mm). IF GEAR LASH DOES NOT MEET SPECIFICATIONS, ACCESSORY DRIVE MUST BE REPLACED.