Specifications

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Preventive Maintenance 32 17730-248

AIRTEK

•

SOFTEK

for Blue Bird Buses

AXLE WRAP LINER INSPECTION

FIGURE 7-16

INSPECTION PROCEDURE

■

Axle wrap liners are installed on the STEERTEK

axle to help prevent any type of abrasion on the

axle at the clamp group area. Any time an axle

wrap is removed it is mandatory that the axle

wrap liner be replaced.

■

Liner Crack Criteria:

It is possible for the axle wrap liner to crack dur-

ing service. If the liner is cracked and all the

pieces are intact it is not necessary to replace the

liner. If the liner is broken out and there are

pieces missing the liner must be replaced imme-

diately, see Figure 7-16. See Axle Wrap

replacement in the Component Replacement

Section of this publication.

SHOCK ABSORBER INSPECTION

Hendrickson uses a long service life, premium shock absorber on all AIRTEK and SOFTEK

suspensions. When the shock absorber replacement is necessary, Hendrickson recom-

mends that the shock absorbers be replaced with identical Hendrickson Genuine parts

for servicing. Failure to do so will affect the suspension performance, durability, and will

void the warranty.

FIGURE 7-17

Inspection of the shock absorber can be performed by

doing a heat test, and a visual inspection. For instruc-

tions on shock absorber replacement see the

Component Replacement Section of this publication. It

is not necessary to replace shock absorbers in pairs if

one shock absorber requires replacement.

HEAT TEST

1. Drive the vehicle at moderate speeds on rough

road for minimum of fifteen minutes.

DO NOT GRAB THE SHOCK AS IT CAN POSSIBLY CAUSE

PERSONAL INJURY.

2. Lightly touch the shock body carefully below the

dust cover, see Figure 7-17.

3. Touch the frame to get an ambient reference. A

warm shock absorber is acceptable, a cold shock

absorber should be replaced.

4. To inspect for an internal failure, remove and

shake the suspected shock. Listen for the sound of

metal parts rattling inside. Rattling of metal parts can indicate that the shock has an

internal failure.

APPENDIX

SERVICE MANUAL