Tools Required

J 39758 King Pin Holding Tool

1. Set the parking brake.
2. Block the vehicle rear wheels.
3. Raise the vehicle frame until the front tires clear the floor.

Notice: Do not use the front crossmember to support the vehicle or the crossmember may buckle.

4. Support the frame using suitable safety stands.
5. Remove the wheels, the hubs, and the bearings. Refer to Front Wheel Hub, Bearing, and Seal Replacement in this section.
6. Remove the brake components as needed. Refer to Brake Caliper Replacement (Front, Bendix) or to Brake Caliper Replacement (Front, Dayton-Walther) in Disc Brakes.
7. Remove the brake backing plates and the dust covers.
8. Remove the upper king pin dust cap (1).



9. In order to remove the king pin nut, use the J 39758 .
10. Insert the tool pins into the holes at the bottom of the king pin.
11. Align the tool's bolt holes and secure the tool with two bolts into the steering knuckle. This will keep the king pin from spinning.



12. Remove the king pin nut (2).
13. Remove the king pin bearing-and-cup assembly (3).
14. Clean the following components using cleaning solvent:

•	The king pin nut

•	The bearing--Soak the bearing until all of the old lubricant is gone.

•	The cavity

Tools Required

1. Pack the cavity and the king pin thrust bearing (3) using high-temperature wheel bearing grease.
2. Install the king pin bearing (3).



3. In order to install the king pin nut, use the J 39758 .
4. Insert the tool pins into the holes at the bottom of the king pin.
5. Align the tool's bolt holes and secure the tool with two bolts into the steering knuckle. This will keep the king pin from spinning.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the king pin nut (2).

Tighten
Tighten the king pin nut to 550 N·m (406 lb ft).




7. Use the J 35999 in order to measure the king pin bearing preload. Refer to King Pin Bearing Preload .



8. Install the dust cap (15) and install the snap ring.
9. Install the following parts:

•	The bottom gasket

•

The cap

•	The washers and the bolts

10. Install the lower king pin cap bolt (17).

Tighten
Tighten the lower king pin cap bolt to 24 N·m (18 lb ft).

11. Lower the vehicle.
12. Remove the blocks.