Installation of the Brake Shim and Updating the
Stamp Specification

TSB-42-022-FCCC

Creation Date:2024-09-20
Engine or Vehicle Affected:

> Walk-in Van

1.1 General Information

MT50e Walk-in Van vehicles in the field are required to have the brake shim installed to prevent the brake pad
retainer clip from rubbing against the rotor on the rear axle. Additionally, the minimum thickness specification
stamped on the rear rotors is inaccurate. The following procedure provides a solution for both of these issues.

1.2 Parts Required
For a list of parts, see 1.

Table 1, Parts Table

Parts Table
Part Number Part Description Quantity
11-31214-000 Plate-Shim, Brake, MTSOE 2

Table 1, Parts Table

1, Park the vehicle on a level surface, shut down the vehicle, and set the parking brake. Chock the tires.

2. Raise the rear of the vehicle until the tires clear the ground. Place safety stands under the axle. For instructions to raise and lower the vehicle,

see Section 00.06 of the Walk-in Van Workshop Manual.
3. Remove the rear wheels. Discard the lug nuts. For instructions, see Section 40.00 of the Walk-In Van Workshop Manual.
4. Loosen and remove the brake caliper mounting bolts. See Fig. 1.

910712023 1422912

Fig. 1, Brake Caliper Mounting Bolts Removal

a

Remove the brake caliper and mounting bracket assembly.

a

. Place a drain pan under the axle shaft flanges and remove the fasteners. See Fig. 2.

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Fig. 2, Drain Pan Under the Axle Shaft Flange

7. Remove the axle shafts.

8. Remove the outer jam nut by straightening the tab on the retainer washer using a chisel or flat screwdriver. See Fig. 3.

9 1822914

Fig. 3, Outer Jam Nut Removal

9. Remove both of the locking washers

10. Remove the spindle nut. See Fig. 4.

27

11,

12.

13.

14.

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Fig. 4, Spindle Nut Removal

Remove the wheel hub and rotor assembly.

fa Notice: When removing the hub, do not let the outer wheel bearing cone fall to
the ground. This may damage the cage of the bearing. If this happens, it must be
replaced.

» Note: Retain all the spindle/hub hardware for the installation.

Remove the nuts holding the hub assembly to the axle flange. 5.

o10712023 1422916

Fig. 5, Nuts to be Removed

While the axle end is disassembled, inspect the minimum thickness specification stamped on the brake rotor. If the specification is indicated
as 1.42 inches, grind down the number two (2) until it is smooth and then stamp the number seven (7). See Fig. 6.

10712023 1422917

Fig. 6, Stamp Specification Update

Install the shim plate between the axle brake mounting flange and the brake assembly. See Fig. 7.

37

oo1o7i2023 22918

1. Shim Plate
Fig. 7, Shim Plate Installation

15. Slide the drum brake assembly onto the axle, making sure to align the bolts with the corresponding holes in the brake mounting flange
Gently maneuver the drum brake into its proper position, ensuring it is seated snugly against the axle brake mounting flange. Begin the

reassembly process by loosely installing the fasteners that were removed during the disassembly. Tighten the fasteners 151 Ib-ft (205 N-m).

16. Remove the old wheel seal and install a new seal.

17. Lubricate the axle spindle and bearing inside the hub.

18. Install the hub assembly onto the drum brake.

19. Install the flat locknut onto the axle, ensuring that the bump is facing outward, toward the wheel end
20. While turning the rotor in a clockwise direction, tighten the nut 100 Ib-ft (136 N-m).

21. Loosen the locknut % rotation, tighten the nut 30 Ib-ft (41 N-m).

22. Turn the locknut until the top of the nut is horizontal. See Fig. 8.

>

910712023 22019

Fig. 8, Nut Allignment

23. Align the tab of the lockwasher with the groove on the axle. Then, ensure that the bump of the locknut is positioned to fit into any available

achieve the desired alignment. See Fig. 9.

hole in the lockwasher. If proper alignment cannot be achieved, remove the lockwasher and rotate it 180 degrees vertically, then reinstall it to

oo10712023 1422920

Fig. 9, Lockwasher Alignment

24. Install the retaining washer, aligning it with the groove in the axle. See Fig. 10.

AT

0712023 1422921

Fig. 10, Retaining Washer Alignment

25. Install the retaining nut and tighten the nut 200 Ib-ft (271 N-m). Once the correct torque is reached, ensure that one of the tabs on the
retaining washer is aligned with a flat side of the retaining nut. Bend this tab from the retaining washer onto the retaining nut to secure it in
place. See Fig. 11.

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Fig. 11, Retaining Nut Installation

26. Place the new gasket over the axle studs and insert the axle into the wheel end and push until the studs engage the axle flange. 12.

10712023 1422923

Fig. 12, Positioning the Axle into the Wheel End

27. Insert the dowel in each hole, then install the washers and fasteners. Tighten the fastener 56 Ib-ft (76 N-m).

28. Install the brake caliper and the caliper mounting bracket assembly. Hand start the mounting hardware then tighten the mounting hardware
475 Ib-ft (644 Nm).

29. Fill the axle with synthetic gear lubricant. Tighten the plug 30 Ib-ft (41 N-m). See Fig. 13.

5I7

9/7/2023,

1. Axle Fill Port
Fig. 13, Axle Fill Port

30. At the fill port, fill each hub with synthetic gear lubricant. Tighten the plug 30 Ib-ft (41 N-m). See Fig. 14.

Fig. 14, Hub Fill Port

31. Install the wheels and tighten the lug nuts 472 Ib-ft (640 N-m).
« Note: Ensure the valve stems are 180 degrees from each when installing the
wheels.

32. Repeat steps 3 through 31 for the opposite wheel.
33. Lower the vehicle and inspect for leaks. For instructions to raise and lower the vehicle, see Section 00.06 of the Walk-In Van Workshop

Manual.
34. Test drive the vehicle for functionality and listen for noises.

1.4 Warranty
This procedure is warrantable only if the described condition exists and the repair is performed within the
applicable base or extended coverage warranty period. If a failure is not found, this procedure is considered

preventive and warranty does not apply.

See 2 for OWL VMRS codes and labor allowance information. Enter this service bulletin number in the Service
Bulletin # field.

Table 2, OWL VMRS Codes and Labor Allowance

Damage Code and Time Guide Information

Primary Failed | Component Cause Correction SRT Description Hours
Part Code Code Code Code
11-31214-000 | 013-002-001 46 14 423- SHIM, SPIDER PLATE, INSTL,
5020A_—_| (SB42-022)

Table 2, OWL VMRS Codes and Labor Allowance

Note: