Specifications

Component Replacement 86 17730-248

AIRTEK

•

SOFTEK

for Blue Bird Buses

FIGURE 9-56 FIGURE 9-57

KINGPIN BUSHING REMOVAL

1. Remove the retaining ring for the grease cap.

2. A hydraulic shop press with a minimum forcing capacity of 2.5 tons (or use an arbor

press) will be required.

BEFORE APPLYING HYDRAULIC PRESSURE TO ANY TOOLING SET-UP, ALWAYS CHECK TO BE

SURE THE PRESS PLATE, ADAPTERS, AND COMPONENTS BEING WORKED ON ARE

POSITIONED PROPERLY, I.E. “IN LINE” WITH THE RAM. IMPROPER POSITIONING CAN CAUSE

PERSONAL INJURY OR COMPONENT DAMAGE.

BEFORE APPLYING HYDRAULIC PRESSURE TO REMOVE OR INSTALL THE KINGPIN BUSHING,

SUPPORT THE LOWER STEERING KNUCKLE AS SHOWN IN FIGURES 9-58 AND 9-59.

IMPROPER SUPPORT TO THE STEERING KNUCKLES CAN CAUSE COMPONENT DAMAGE.

3. Use the grease cap to press out the kingpin bushing and seal. Remove the grease zerk in

the grease cap or use a hollow driver, (see Figure 9-58) to press out the kingpin bushing.

4. Install the lower steering knuckle upside down in press. Be sure to support the lower

steering knuckle assembly so that it sits in-line with the press, see Figure 9-59.

5. Use the same procedure to remove the kingpin bushing in the upper kingpin connec-

tion or the steering arm, see Figures 9-58 through 9-60.

6. Clean the parts and inspect for reassembly, see Figure 9-61.

FIGURE 9-58 FIGURE 9-59

128

APPENDIX

SERVICE MANUAL