325, 325B and 325L Excavators Caterpillar

Installation Procedure For The Swing Gear and Bearing On CIPI Undercarriage Arrangements Which Are Based On 325 Track Type Excavators

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Illustration 1	g00365832

1. Lay a new dust seal (3) around the outer race in order to determine the required length. Cut the new seal approximately 1.0 cm (0.39 inch) shorter than the required length. Cut the seal at a 90 degree angle. Use a file to smoothen the cross section cut of the seal.

2. Install new dust seal (3) in the outer race by using 8T-9021 Adhesive. Be sure to apply adhesive on the 90 degree cross section cut in the seal. Install the seal so that the lip of the seal is facing in the direction that is shown. Refer to Illustration 1.

3. Follow the procedure in Steps 1 and 2 in order to install a new dust seal (4) in the inner race.

4. Lubricate the swing gear and bearing with 5P-0960 Molybdenum Grease .

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Illustration 2	g00500040

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Illustration 3	g00520674

Note: Clean the mating surface for the swing gear and bearing on the undercarriage frame assembly.

5. Apply 1U-8846 Sealant on the mating surface for the swing gear and bearing of the undercarriage frame assembly. Fasten Tooling (A) and a suitable lifting device to swing gear and bearing (1), as shown. Refer to Illustration 2. The weight of the swing gear and bearing is approximately 428 kg (944 lb). Place the swing gear and bearing in the swing gear and bearing's original position on the undercarriage frame assembly. Make sure that the stamped mark "S" on the inner race is in the position that is shown, relative to the undercarriage frame assembly and the stopper on the outer race. Refer to Illustration 3.

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Illustration 4	g00520670
Typical Example

6. Apply a thin coat of 4C-5593 Anti-Seize Compound on the threads of bolts (2). Install the spacers and bolts (2) that secure the swing gear and bearing to the undercarriage frame assembly. Tighten the bolts to a torque of 785 ± 79 N·m (580 ± 60 lb ft). If you desire, Tooling (B) can be used to tighten the bolts.

7. Add approximately 40 L (10.6 US gal) of 5P-0960 Molybdenum Grease to the swing gear and bearing after the installation.

End By: Install the undercarriage frame assembly. Refer to the manufacturer's Disassembly and Assembly Manual for the installation of the undercarriage frame.

Installation Procedure For The Swing Gear and Bearing On CIPI Undercarriage Arrangements Which Are Based On 325B Track Type Excavators

Note: If the inner dust seal (3) and the outer dust seal (4) were installed dry, the new dust seals should be installed dry in the swing gear and bearing.

Note: If the inner dust seal and the outer dust seal were bonded to the swing gear and bearing, the new dust seals should be bonded to the swing gear and bearing.

Note: Perform Steps 1.a through 1.j in order to install the new dry dust seals.

Note: Perform Steps 2.a through 2.p in order to install the new dust seals that are bonded to the swing gear and bearing.

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Illustration 5	g00636223

1. If inner dust seal (3) and outer dust seal (4) were installed dry, use the following procedure in order to install the new dust seals:

   1. Use a wire brush in order to thoroughly clean the grooves for the dust seal of the swing gear and bearing. Make sure that all of the dirt and foreign material has been removed.

   2. Wash the grooves for the dust seal in a suitable solvent that will not leave an oily residue.

   3. Make sure that the grooves for the dust seal in the swing gear and bearing are thoroughly clean and dry prior to installation of the dust seals.

   4. Cut one end of inner dust seal (3) at a 90 degree angle. Use a blunt tool in order to install the inner dust seal in the seal groove of the swing gear and bearing.

   5. Install the seal so that the lip of the seal is facing in the direction that is shown. Refer to Illustration 5.

   6. After the inner dust seal is completely installed in the seal groove, measure the seal and cut the remaining end of the inner dust seal at a 90 degree angle. Install the remaining end of the inner dust seal in the seal groove.

   7. Make sure that the inner dust seal is seated properly in the seal groove, all the way around the swing gear and bearing. Also, make sure that there is no gap between the ends of the inner dust seal.

   8. Pull each end of the inner dust seal out of the seal groove of the swing gear and bearing approximately 50.8 mm (2.00 inch). Apply 152-9155 Loctite 380 Black Max to each end of the inner dust seal in order to bond the seals together.

   9. Immediately reinstall the inner dust seal in the seal groove of the swing gear and bearing. Again, make sure that the entire inner dust seal is properly seated in the seal groove of the swing gear and bearing. No gap should exist between the ends of the inner dust seal.

   10. To ensure that the lip of inner dust seal has not adhered to the top of the bearing at the seal joint, run a dull putty knife between the lip of the seal and the bearing at the seal joint.

   11. Follow the procedure in Steps 1.a through 1.j in order to install outer dust seal (4) in the swing gear and bearing. Refer to Illustration 5 for proper seal orientation in the swing gear and bearing.

2. If inner dust seal (3) and outer dust seal (4) were bonded in the swing gear and bearing, use the following procedure in order to install the new dust seals:

   1. Thoroughly clean all the dirt and foreign material from the grooves for the dust seal in the swing gear and bearing with a wire brush.

   2. Wash the grooves for the dust seal in a suitable solvent that will not leave an oily residue.

   3. Make sure that the grooves for the dust seals in the swing gear and bearing are thoroughly clean and dry prior to installation of the dust seals.

   Note: Install inner dust seal (3) and outer dust seal (4) in the swing gear and bearing in small increments, because 152-9155 Loctite 380 Black Max cures very quickly.

   4. Cut one end of inner dust seal (3) at a 90 degree angle.

   5. Start applying 152-9155 Loctite 380 Black Max 50.8 mm (2.00 inch) from the cut end of the seal. Apply 152-9155 Loctite 380 Black Max to the seal in 152.4 mm (6.00 inch) increments.

   6. Immediately use a blunt tool in order to install only the bonded portion of the inner dust seal in the seal groove of the swing gear and bearing. Make sure that the dust seal is seated properly in the seal groove.

   7. Install the seal so that the lip of the seal is facing in the direction that is shown. Refer to Illustration 5.

   8. To ensure that the inner dust seal has not adhered to the bearing, run a dull putty knife between the lip of the seal and the bearing.

   9. Apply 152-9155 Loctite 380 Black Max to the next 152.4 mm (6.00 inch) of the seal. Immediately use a blunt tool in order to install only the bonded portion of the inner dust seal in the seal groove of the swing gear and bearing.

   10. Make sure that the inner dust seal is seated properly in the seal groove. To ensure that the inner dust seal has not adhered to the bearing, run a dull putty knife between the lip of the seal and the bearing.

   11. Repeat Steps 2.i and 2.j until the entire length of the inner dust seal is installed. Do not install the last 152.4 mm (6.00 inch) of the inner dust seal.

   12. Measure the inner dust seal and cut the remaining end of inner dust seal (3) at a 90 degree angle. Install the last 152.4 mm (6.00 inch) of seal in the seal groove dry.

   13. Make sure that the inner dust seal is properly seated in the seal groove and that there is no gap between the seal ends. Carefully remove both loose ends of the inner dust seal out of the seal groove.

   14. Apply 152-9155 Loctite 380 Black Max to the loose ends of the seal.

   15. Immediately use a blunt tool in order to reinstall the seal ends in the seal groove. Again, make sure that the inner dust seal is properly seated in the seal groove, and that no gap existed between the ends of the seal.

   16. To ensure that the inner dust seal has not adhered to the top of the bearing, run a dull putty knife around the seal.

   17. Follow the procedure in Steps 2.a through 2.p to install outer dust seal (4) in the swing gear and bearing. Refer to Illustration 5 for proper seal orientation in the swing gear and bearing.

3. Lubricate the swing gear and bearing with grease.

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Illustration 6	g00520664

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Illustration 7	g00520674

Note: Clean the mating surface for the swing gear and bearing on the undercarriage frame assembly.

4. Apply 1U-8846 Sealant on the mating surface for the swing gear and bearing of the undercarriage frame assembly.

5. Fasten Tooling (A) and a suitable lifting device to swing gear and bearing (1), as shown. Refer to Illustration 6. The weight of the swing gear and bearing is 660 kg (1455 lb).

6. Place the swing gear and bearing in the swing gear and bearing's original position on the undercarriage frame assembly.

7. Make sure that the stamp "S" on the inner race is in the position that is shown, relative to the undercarriage frame assembly and the stopper on the outer race. Refer to Illustration 7.

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Illustration 8	g00520670

8. Apply a thin coat of 4C-5593 Anti-Seize Compound on the threads of bolts (2). Install the spacers and bolts (2) that secure the swing gear and bearing to the undercarriage frame assembly.

   Note: Some machines use bolts that are plated with Dacromet. Dacromet bolts appear silver, gray in color. Do not apply 4C-5593 Anti-Seize Compound to the threads of Dacromet bolts. Make sure that the bolt holes are clean and dry when Dacromet bolts are used.

9. Use Tooling (B) to tighten the bolts to a torque of 1000 ± 125 N·m (740 ± 90 lb ft).

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NOTICE
Improper lubrication can cause damage to machine components. To avoid damage, make sure that the proper amount of grease is applied to the swing drive. When the amount of grease in the compartment becomes too large, the agitation loss becomes large, thereby accelerating grease deterioration. Grease deterioration can cause damage to the pinion gear of the swing drive and swing internal gear. Not enough grease will result in poor gear lubrication.

10. Add 5P-0960 Molybdenum Grease to the swing gear and bearing after the installation.

    Reference: Refer to Operation and Maintenance Manual, "Refill Capacities" for the capacity of the swing gear and bearing.

    Reference: Refer to Operation and Maintenance Manual, "Swing Gear - Lubricate" for lubricating the swing gear and bearing.

    Reference: Refer to Operation and Maintenance Manual, "Maintenance Interval Schedule" for the schedule for lubricating the swing gear and bearing.

End By: Install the undercarriage frame assembly. Refer to the manufacturer's Disassembly and Assembly Manual for the installation of the undercarriage frame.

Installation Procedure For The Swing Gear and Bearing On CIPI Undercarriage Arrangements Which Are Based On 325C Track Type Excavators

Note: If the inner dust seal and the outer dust seal were originally dry installed, use the dry installation procedure. If the inner dust seal and the outer dust seal were originally bonded, use the bonded installation procedure.

Dry Installation Procedure

1. Use a wire brush in order to thoroughly clean all of the dirt and all of the foreign material from the seal grooves in the swing gear and bearing.

2. Wash the seal grooves with a suitable solvent that will not leave an oily residue.

3. Make sure that the seal grooves in the swing gear and bearing are thoroughly clean and dry prior to the installation of the dust seals.

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Illustration 9	g00721855

4. Cut one end of inner dust seal (3) at an angle of 90 degrees. Use a blunt tool to install the inner dust seal in the seal groove of the swing gear and bearing. Position the lip of the seal toward the bearing, as shown.

5. Measure the inner dust seal and cut the remaining end of the inner dust seal at an angle of 90 degrees. Install the remaining end of the inner dust seal in the seal groove.

6. Make sure that the inner dust seal is correctly seated in the seal groove. Make sure that there is not a gap between the ends of the inner dust seal.

Note: Loctite 380 cures very quickly.

7. Pull both ends of the inner dust seal out of the seal groove approximately 50.8 mm (2.00 inch). Apply Loctite 380 to the cut ends of the inner dust seal. Bond both ends together. Immediately install the inner dust seal into the seal groove of the swing gear and bearing.

8. Make sure that the inner dust seal is correctly seated in the seal groove. Make sure that there is not a gap between the ends of the inner dust seal.

9. Run a dull putty knife between the lip of the seal and the bearing at the seal joint in order to ensure that the lip of the inner dust seal does not adhere to the top of the bearing at the seal joint.

10. Repeat Step 1 through Step 9 in order to install outer dust seal (4). Refer to Illustration 9 for the correct seal orientation in the swing gear and bearing.

11. Lubricate the swing gear and bearing with grease.

12. Clean the mating surfaces of the swing gear and bearing and the undercarriage frame.

13. Apply 1U-8846 Sealant on the mating surface of the undercarriage frame. Apply 4C-5599 Anti-Seize Compound to the dowel in the swing gear and bearing.

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Illustration 10	g00520664

14. Attach Tooling (A) to swing gear and bearing (1). Attach a suitable lifting device to Tooling (A). The weight of the swing gear and bearing is approximately 280 kg (615 lb).

15. Position swing gear and bearing (1) in the original location on the undercarriage frame.

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Illustration 11	g00721502
(X) Stopper

16. Position the "S" that is located on the inner race, as shown.

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Illustration 12	g00520670

17. Apply 4C-5599 Anti-Seize Compound to the threads of bolts (2). Install the spacers and new bolts (2) that hold the swing gear and bearing to the undercarriage frame. Use Tooling (B) to tighten new bolts (2) to a torque of 900 ± 100 N·m (664 ± 74 lb ft).

18. Add 5P-0960 Molybdenum Grease to the swing gear and bearing. Refer to the Operation and Maintenance Manual for further information.

End By: Install the undercarriage frame assembly. Refer to the manufacturer's Disassembly and Assembly Manual for the installation of the undercarriage frame.