SFN-20231007A_Shim the steering gearbox outboard

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TICO Document #: SFN-20231007A (formerly TES-203)

Issue: The steering column shaft comes into contact with the inside edge of the cutout due to a misalignment of the steering column to the steering gear

Description of Procedure: Create additional clearance between the steering shaft and the inside edge of the cab floor

Units Affected: 2017 new cab style

Parts Required:

  • BOLT 7/8”-9 X 3-1/2“ LONG HHCS 82487 (QTY 3)

  • LOCK NUT, NYLOCK COARSE 7/8”-9 85030 (QTY 3)

  • WASHER, FLAT, 7/8” 85096 (QTY 12)

Planned Labor: 30 minutes

Instructions:

  1. Park the vehicle on a flat surface, and apply the parking brake and chock wheels. If your company utilizes a “Lock Out, Tag Out” policy, you should employ it during this procedure.

  2. Inspect the clearance between the steering shaft and the inside edge of the Cab Floor. If the clearance is less than 1/16” (1.5 mm), proceed with this procedure for adding additional clearance between the inside edge of the cab floor and the steering shaft. (See Figure #1 for the location to inspect.)

  1. If additional clearance is needed between the steering shaft and the cutout in the cab floor, loosen the three (3) sets of bolts holding the steering gear to the mounting plate. Remove ONLY the two (2) lower sets of hardware and discard the used hardware. DO NOT REMOVE THE UPPER BOLT AT THIS TIME. (See Figure #2.)

  1. With the steering gear loose, the upper bolt loosened but still in place to support the steering gear, install the two (2) lower bolts. (See Figure #3.)

  1. At each bolt, use two (2) of the washers to space the steering gear off of the mounting plate and one (1) washer each at the bolt head and at the nut.

  2. Once the two (2) lower bolts and hardware are hand-tight, finish the removal and discard the upper bolt and hardware. Install the new bolt and hardware as shown in Figure #3.

  1. Verify the clearance between the steering shaft and the cab floor is greater than 1/16” (1.5 mm).

  1. Torque the steering gear bolts to 360 lbf-ft (488 n-m).

  1. Remove the “Lock Out, Tag Out” plaque.

  1. Return the vehicle to service.