AirTek AT90 Dokumentacja Pobierz pdf (Strona 44)

Preventive Maintenance 36 17730-248

AIRTEK

•

SOFTEK

for Blue Bird Buses

SHACKLE THRUST WASHER INSPECTION (If Equipped)

NOTE SOFTEK Vision 8K capacity vehicles built after 02/2007, and all other vehicles built after

11/2006 are not equipped with shackle thrust washers.

In normal use these components will function satisfactorily, even though the components

may show some wear.

FIGURE 7-24

An indication that the shackle thrust washers are worn, or need replacement is when the

suspension exhibits one or more of the following conditions:

1. Excessive lateral movement of the spring.

2. The rear spring eye and or thrust washers are in contact with the shackle plates.

3. Normal and unacceptable thickness of the thrust washers (See Figure 7-24) can be

measured with a micrometer or a ruler.

■

The normal thickness of a new thrust washer is

⁄

" (0.187").

■

The minimum thickness allowable for a thrust washer is

⁄

" (0.090").

■

If one or more of these conditions is experienced, disassembly of the rear shack-

le assembly is required to replace the thrust washers.

■

If one thrust washer is worn out, Hendrickson recommends both thrust washers

on that side of the suspension be replaced. Inspect the thrust washers on the other

side of the vehicle and replace if necessary. See Shackle Thrust Washer replace-

ment procedure in the Component Replacement Section of this publication.

Thrust Washer

*Specification provided, controlled and subject to change by vehicle manufacturer.

Shackle Bracket

Shackle Plate

M20 Locknut

Tightening Torque

290-310* ft. lbs.

Leaf Spring with Bushing

Washer

M20 Bolt

APPENDIX

SERVICE MANUAL

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 119 120

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