Crankshaft Oversize Front Oil Seal Replacement

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

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

Tools and Special Equipment:                   Equipment Condition:
Shop Equipment, SC 4910-95-CL-A31              Reference              Condition Description
TOO l Kit, SC 5180-90-CL-N05
Oil Seal Remover, J35993                       Page 3-116             Gear Case Cover
Oil Seal Installer, J35686                                            Removed
Oil Seal Expander, J35685-A
Materials/Parts:
Seal                   P/N Y327984TA
Sleeve                 P/N J-2037
Cloth, Abrasive        Appendix B, Item 10
Oil, Lubricating       Appendix B, Item 37

                                          CAUTION
         Be careful not to damage crankshaft surface when peening wear sleeve. Do
         not use puller or cut sleeve to remove wear sleeve.

       REMOVE AND DISCARD CRANKSHAFT WEAR SLEEVE (1) FROM FRONT OIL SEAL CRANKSHAFT
       (2) CONTACT AREA. PEEN OUTSIDE CRANKSHAFT WEAR SLEEVE DIAMETER CAREFULLY
       UNTIL IT STRETCHES ENOUGH TO SLIDE OFF CRANKSHAFT (2).

TM page 3-232

Illustration from TM 9-2320-363-34-1 (PDF page 308)

NOTE Wear line on crankshaft should be evident where contact was made with oil seal,

1. INSPECT OIL SEAL CONTACT SURFACE OF CRANKSHAFT CAREFULLY.

2. INSPECT EXPOSED AREAOF CRANKSHAFT FOR DIRT, BURRS, OR ROUGH SURFACES.

3. IF NECESSARY, CLEAN CRANKSHAFT SURFACE WITH ABRASIVE CLOTH.

1. INSTALL GEAR CASE COVER (1) (PAGE 3-116).

CAUTION Make sure gear case cover seal bore, front of crankshaft, and both sides of oil seal installer base are clean, smooth, and free of any foreign material or damage to prevent damage to equipment.

2. POSITION OIL SEAL INSTALLER BASE (2) ON CRANKSHAFT (3).

3. INSTALL TWO GUIDE STUDS (4) IN TWO CRANKSHAFT (3) BOLT HOLES 180 DEGREES APART.

4. HAND-TIGHTEN TWO GUIDE STUDS (4) UNTIL INSTALLER BASE (2) IS TIGHT AGAINST FRONT OF CRANKSHAFT (3).

TM page 3-233

NOTE

Before oil seal installation, direction of arrow on oil seal should match engine rotation.

5. CAREFULLY INSTALL NEW OVERSIZED CRANKSHAFT OIL SEAL (5) ON NEW WEAR SLEEVE (6) FROM CHAMFERED END OF SLEEVE. POSITION OIL SEAL (5) IN MIDDLE OF SLEEVE (6) WITH CASE SIDE OF SEAL AWAY FROM CHAMFERED END OF SLEEVE.

6. POSITION AND INSTALL OIL SEAL AND SLEEVE ASSEMBLY IN OIL SEAL INSTALLER HOUSING (7) WITH SEAL CASING AGAINST INSTALLER HOUSING.

7. PLACE OIL SEAL INSTALLER HOUSING (7) WITH OIL SEAL AND SLEEVE ASSEMBLY OVER CENTER SCREW (8) AND TWO GUIDE STUDS (4) AND POSITION SLEEVE (6) AGAINST FRONT OF CRANKSHAFT.

8. INSTALL THRUST BEARING (9) ON CENTER SCREW (8) WITH LETTERED SIDE OF BEARING AGAINST OIL SEAL INSTALLER HOUSING (7).

9. INSTALL NUT (10) ON CENTER SCREW (8). TIGHTEN NUT UNTIL CRANKSHAFT FRONT OIL SEAL AND SLEEVE ARE SEATED FIRMLY.

10. REMOVE OIL SEAL INSTALLER NUT (10), THRUST BEARING (9), INSTALLER HOUSING (7), GUIDE STUDS (4), AND INSTALLER BASE (2).

NOTE Follow-on Maintenance:

Install front mount (page 3-46). Install vibration damper (page 3-122). Install tachometer cable (TM 9-2320-363-20). Install power steering pump (page 7-2). Install accessory drive (page 3-126). Install alternator (TM 9-2320-363-20).

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