Specifications

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Component Replacement 50 17730-248

AIRTEK

•

SOFTEK

for Blue Bird Buses

SECTION 9

Component Replacement

FASTENERS

Hendrickson recommends that when servicing the vehicle to replace the removed fasteners

with new equivalent fasteners. Maintain correct torque values at all times. Check torque val-

ues as specified. See Hendrickson’s Torque Specifications in the Appendix of this

publication. If non-Hendrickson fasteners are used follow torque specifications listed in the

vehicle manufacturer’s service manual.

SPACERS

There are different front axle spacer configurations for each front suspension system. Prior

to disassembly of the front axle clamp group, note the orientation and quantity of the front

axle spacer(s) (if equipped). It is required that the axle spacers be installed in the same

orientation and location as removed to preserve the existing vertical alignment. Refer to the

Parts List Section of this publication.

AIRTEK HEIGHT CONTROL VALVE – 10K

DISASSEMBLY

1. Drain the air from the secondary air tank.

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.

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

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

3. Deflate the air springs by removing the height control valve linkage at the rubber grom-

met and lowering the height control linkage arm. This will exhaust the air pressure in

the air springs.

FIGURE 9-1 10K

THE PUSH-TO-CONNECT FITTINGS ARE NON-

SERVICEABLE. IT IS NECESSARY TO CLEAN THE

DIRT AND DEBRIS AWAY FROM THE PUSH-TO-

CONNECT FITTINGS AND THE AIR LINES TO HELP

PREVENT ANY FOREIGN MATERIAL FROM

ENTERING THE AIR SPRING, AIR SYSTEM OR

DAMAGING THE PUSH-TO-CONNECT FITTINGS.

CLEAN PUSH-TO-CONNECT FITTINGS USING

SOAPY WATER AND A SOFT BRISTLED BRUSH AND

DRY WITH COMPRESSED AIR.

4. Remove the air lines from the height control

valve, see Figure 9-1. The air lines are

push-to-connect. Push in on the air line to

release tension, push down on the collar

and pull out the air line.

5. Remove the two ¼" mounting nuts and washers.

6. Remove the height control valve.

¼ Nylon Air Line"

Leveling Valve Arm

Push-to-connect

Fittings

Air Spring Bracket

Air Spring

APPENDIX

SERVICE MANUAL