Specifications

17730-248 59 Component Replacement

AIRTEK

•

SOFTEK

for Blue Bird Buses

4. Remove the frame stands and lower frame.

5. Tighten M20 shackle locknut to vehicle manufacturer's specifications.

6. Remove the wheel chocks.

AIRTEK REAR SHACKLE FRAME BRACKET

DISASSEMBLY

1. Place the vehicle on level floor.

2. Chock the wheels.

3. Raise the frame.

4. Support the vehicle with frame stands.

5. Suspend the front axle from the shocks.

PRIOR TO AND DURING DEFLATION AND INFLATION OF THE FRONT AIR SUSPENSION SYSTEM,

ENSURE THAT ALL PERSONNEL AND EQUIPMENT ARE CLEAR FROM UNDER THE VEHICLE AND

AROUND THE SERVICE AREA, FAILURE TO DO SO CAN CAUSE SERIOUS PERSONAL INJURY,

DEATH, OR PROPERTY DAMAGE.

6. See additional Air Spring Cautions and Warnings in the Important Safety Notice Section

of this publication prior to inflating or deflating the suspension system.

7. Deflate the air springs by removing the height control valve linkage and lowering the

leveling valve arm. This will exhaust the air pressure in the air springs.

8. Remove the air lines from air springs.

9. Remove the rear M20 spring eye and shackle pivot bolts, washers and locknuts.

SERVICE HINT A bottle jack may be required to raise the axle slightly to facilitate removal of the rear spring

eye bolt.

10. Remove the frame fasteners from the shackle bracket. See manufacturer's guidelines.

11. Remove the shackle bracket from the vehicle, see Figures 9-13 and 9-14.

12. Inspect the shackle assembly and both thrust washers (if equipped) for excessive wear

or damage. See Thrust Washer Inspection in the Preventive Maintenance Section of this

publication. Hendrickson recommends the thrust washers be replaced when this

assembly is serviced.

13. If damaged or worn excessively, replace with Genuine Hendrickson Parts as detailed

in the Component Replacement Section of this publication.

FIGURE 9-13

SERVICE MANUAL

101

FRONT AXLE & SUSPENSION

APPENDIX