Crankshaft Oversize Rear 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
Tool Kit, SC 5180-90-CL-N05
Oil Seal Remover, J35993                      Page 3-148             Flywheel Housing
Oil Seal Expander, J35685-A                                          Removed
Oil Seal Installer, J35686
Materials/Parts:
Seal                    P/N 2327984TA
Sleeve                  P/N J-2037
Cloth, Abrasive        Appendix B, Item 10

                                          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 REAR OIL SEAL CRANKSHAFT
       (2) CONTACT AREA. PEEN OUTSIDE CRANKSHAFT WEAR SLEEVE DIAMETER CAREFULLY
       UNTIL IT STRETCHES ENOUGH TO SLIDE OFF CRANKSHAFT (2).

TM page 3-146

Illustration from TM 9-2320-363-34-1 (PDF page 222)

CAUTION Make sure flywheel housing seal bore, rear of crankshaft, and both sides of oil seal installer base and spacer are clean, smooth, and free of any foreign material or damage to prevent damage to equipment. **NOTE**

Minor wear iine on crankshaft surface should be evident where contact was made with oil seal. This is normal.

1. INSPECT OIL SEAL CONTACT SURFACE OF CRANKSHAFT CAREFULLY.

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

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

1. INSTALL FLYWHEEL HOUSING (1) (PAGE 3-148).

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

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

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

5. INSTALL OIL SEAL INSTALLER SPACER (5) ON CENTER SCREW (6).

TM page 3-147

Illustration from TM 9-2320-363-34-1 (PDF page 223)

NOTE Note direction of indication arrow on new seal showing engine rotation.

CAREFULLY INSTALL NEW CRANKSHAFT OVERSIZE REAR OIL SEAL (7) ON NEW WEAR SLEEVE (8) FROM CHAMFERED END OF SLEEVE. POSITION OIL SEAL (7) IN MIDDLE OF SLEEVE (8) WITH CASE SIDEOF SEAL AWAY FROM CHAMFERED END OF SLEEVE.

7. POSITION AND INSTALL OIL SEALAND SLEEVE ASSEMBLY IN OIL SEAL INSTALLER HOUSING (9) WITH SEAL CASING AGAINST INSTALLER HOUSING.

8. PLACE OIL SEAL INSTALLER HOUSING (9) WITH OIL SEAL AND SLEEVE ASSEMBLY OVER CENTER SCREW (6) AND TWO GUIDE STUDS (4) AND POSITION SLEEVE (8) AGAINST REAROF CRANKSHAFT (3).

9. INSTALL THRUST BEARING (10) ON CENTER SCREW (6) WITH LETTERED SIDE OF BEARING AGAINST OIL SEAL INSTALLER HOUSING (9).

10. INSTALL NUT (11) ON CENTER SCREW (6). TIGHTEN NUT UNTIL CRANKSHAFT OVERSIZE REAR OIL SEAL AND SLEEVE ARE SEATED FIRMLY.

11. REMOVE OIL SEAL INSTALLER NUT (11), THRUST BEARING (10), INSTALLER HOUSING (9), SPACER (5), GUIDE STUDS (4), AND INSTALLER BASE (2).

TM page 3-148