Specifications

Component Replacement 90 17730-248

AIRTEK

•

SOFTEK

for Blue Bird Buses

FIGURES 9-72 AND 9-73

STEERING KNUCKLE ASSEMBLY

ASSEMBLY

After replacement of the kingpin bushings it is necessary to re-assemble the steering knuck-

le assemblies. The STEERTEK axle is equipped with two different thrust bearings installed.

The composite thrust bearing is installed on the left side of the axle. The roller bearing is

installed on the right side of the axle, see Figures 9-74 and 9-75, for right hand drive axle

configuration the thrust bearings will be the opposite. Do not substitute aftermarket com-

ponents when servicing.

1. Install the thrust bearing on the lower kingpin with the seal facing up toward axle (the

black seal will designate the top side). The composite thrust bearing is installed on the

left side of the axle. The roller bearing is installed on the right side of the axle, see

Figures 9-74 and 9-75. For right hand drive axle configuration the thrust bearings will

be the opposite.

2. Install the shim on the upper kingpin.

3. Pack the bushing dimples on the upper and lower steering knuckles with multi purpose

Lithium based grease (NLGI Grade 2) before installation, see Figures 9-74 and 9-75.

FIGURE 9-74 FIGURE 9-75

4. Install the upper steering knuckle on the upper arm kingpin.

5. Install the lower steering knuckle on the lower kingpin and install the old socket head

cap screws loose into the top two threaded holes.

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APPENDIX

SERVICE MANUAL