325D Material Handler Machine Systems Caterpillar

Swing Gear and Bearing - Install

Usage:

Installation Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7576	Link Bracket	4
B	132-8223	Hydraulic Pump and Motor (115 V 50/60 Hz Single Phase)⁽¹⁾	1
	1U-6221	Hydraulic Torque Wrench	1
	132-8143	36 mm Hex Link	1
C	-	Loctite 435	-
D	2P-9066	Lubricant	-
E	1U-8846	Gasket Sealant	-
F	4C-5599	Anti-Seize Compound	-

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⁽¹⁾	132-8231 Hydraulic Pump and Motor (220 V 50/60 Hz Single Phase) is also available.

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 1	g00636223

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 1.
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 Tooling (C) 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 1 for proper seal orientation in the swing gear and bearing.
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 Tooling (C) cures very quickly.
4. Cut one end of inner dust seal (3) at a 90 degree angle.
5. Start applying Tooling (C) 50.8 mm (2.00 inch) from the cut end of the seal. Apply Tooling (C) 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 1.
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 Tooling (C) 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 Tooling (C) 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 1 for proper seal orientation in the swing gear and bearing.
Lubricate the swing gear and bearing with Tooling (D).
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Illustration 2 g00520664

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Illustration 3 g00520674

Note: Clean the mating surface for the swing gear and bearing on the undercarriage frame assembly.
Apply Tooling (E) 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). Refer to Illustration 2. The weight of swing gear and bearing (1) is approximately 635 kg (1400 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 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 3.
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Illustration 4 g00520670
Apply a thin coat of Tooling (F) 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 Tooling (F) to the threads of Dacromet bolts. Make sure that the bolt holes are clean and dry when Dacromet bolts are used.

Use Tooling (B) to tighten bolts (2) to a torque of 1000 ± 125 N·m (738 ± 92 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.

Add Tooling (D) to the swing gear and bearing after the installation. Refer to Operation and Maintenance Manual, "Refill Capacities" for the capacity of the swing gear and bearing. Refer to Operation and Maintenance Manual, "Swing Gear - Lubricate" for lubricating the swing gear and bearing. Refer to Operation and Maintenance Manual, "Maintenance Interval Schedule" for the schedule for lubricating the swing gear and bearing.