735 Articulated Truck Power Train Caterpillar

Wheel Bearings and Duo-Cone Seals (Rear) - Install

Usage:

735 AWR

Installation Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7574	Link Bracket	1
B	136-1452	Internal Tip Pliers	1
C	1U-8865	Infrared Thermometer	1
D	1U-6434	Duo-cone Seal Installer	1

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NOTICE

Failure to properly assemble parts or failure to follow established procedures can lead to damage of the parts and assembly. To avoid damage to parts, always identify and mark the parts so that they can be installed in the same location. Ensure that gear surfaces align. Never force parts during assembly.

Note: Check all of the components after installation. Be certain that the components are properly seated.

Note: You may heat components for installation purposes and you may cool components for installation purposes. When you heat a component, do not exceed a temperature of 135 °C (275 °F). Do not heat components for more than four hours. Use Tooling (C) in order to check the temperature of the components.

Note: You must replace bearing cups and bearing cones together. Lubricate the bearing cups and the bearing cones with clean lubricant in order to prevent the formation of rust.

Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.

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Illustration 1	g00853318

Attach a suitable nylon lifting sling and use a suitable hoist in order to position spindle (6) to the rear axle. The weight of the spindle is 62 kg (137 lb). Install plate (17) between the spindle and the axle. Install 26 bolts (18) and the washers in order to connect the spindle and the plate to the axle. Remove the nylon lifting sling and the hoist.

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Illustration 2	g00853351

Install roller bearing cone (9) onto spindle (6) .

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Illustration 3	g00853368

Install the O-ring to seal retainer (8) .

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Illustration 4	g00853363

Install seal retainer (8) to spindle (6) .
Note: Align the locating dowel in the seal retainer with the locating hole in the spindle. See the white arrow in illustration 4.

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Illustration 5	g00863719

Use Tool (D) in order to install Duo-cone seal (7). Be careful to protect the sealing surfaces of the Duo-cone seal from damage.

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Illustration 6	g00853773

Install roller bearing cup (16) into wheel (1). The weight of the wheel is 160 kg (353 lb).

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Illustration 7	g00853774

Invert wheel (1). Install roller bearing cup (15) into the wheel.

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Illustration 8	g00853775

Use Tool (D) to install Duo-cone seal (14) on wheel (1). Be careful to protect the sealing surfaces of the Duo-cone seal from damage.

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Illustration 9	g00853779

Install roller bearing cone (13) onto hub (12). The hub weighs 23.5 kg (52 lb).

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Illustration 10	g00852608

Use Tool (B) to install snap ring (10) in order to secure ring gear (11) onto hub (12). The ring gear weighs 21.5 kg (47 lb) and the hub weighs 23.5 kg (52 lb).

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Illustration 11	g00852468

Attach Tool (A) to wheel (1). Attach a suitable nylon lifting sling to Tool (A) and a suitable hoist. Lift the wheel into position on the machine.

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Illustration 12	g00852454

Use two people in order to lift the hub and ring gear assembly (5) into wheel (1). Align the splines on the hub and ring gear assembly with the splines on spindle (6). Carefully slide the hub and ring gear assembly onto the spindle. The hub and ring gear assembly weighs 45 kg (100 lb).

Use the following procedure to set the preload on the wheel bearings:
1. Measure the thickness of retainer plate (3) at the three small holes. See the white arrow in illustration 13. Calculate the average thickness of the retainer plate.
1. Install retainer plate (3) and three bolts (2) onto the spindle. Do not install the shims. Evenly space the bolts next to the three small holes in the retainer plate. See the white arrow in illustration 14. Remove Tool (A) and the hoist from wheel (1) .
1. Tighten three bolts (2) to a torque of 100 N·m (74 lb ft). Rotate wheel (1) for several revolutions. Torque the bolts and rotate the wheel again.
1. Loosen three bolts (2) .
1. Tighten three bolts (2) to a torque of 40 N·m (29.5 lb ft). Rotate wheel (1) for several revolutions. Continue the sequence of torquing the bolts and rotating the wheel until the bolts torque stays at 40 N·m (29.5 lb ft).
1. Use a depth micrometer in order to find the average depth from the top of retainer plate (3) and the top of the spindle. Make the measurement through the three small holes in the retainer plate. See the white arrow in illustration 15.
1. Subtract the thickness of retainer plate (3) from the depth of the holes. See step 14.a for the thickness of the retainer plate and see step 14.f for the depth of the holes. This is the dimension of the gap between the end of the spindle and the retainer plate.
1. Remove retainer plate (3). Install shims (4) with a thickness that is equal to the gap, calculated in step 14.g, plus an extra 0.1 mm (0.004 inch). Use a micrometer to check the thickness of the shims.

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Illustration 17	g00853794

Install shims (4) (not shown), retainer plate (3) and eight bolts (2) in order to secure the hub and ring gear assembly (5) to wheel (1). The torque for the bolts is 150 ± 20 N·m (110 ± 15 lb ft).

End By:

Install the final drive. Refer to Disassembly and Assembly, "Final Drive - Install".
Install the axle shaft. Refer to Disassembly and Assembly, "Axle Shaft - Install".
Install the tire and rim. Refer to Disassembly and Assembly, "Tire and Rim - Install".