Wheel Studs; Anti-Lock Braking System (Abs) Tooth Wheel - Meritor PreSet Maintenance Manual

4 Prepare Parts for Assembly

Wheel Studs

Replace all wheel studs that have damaged or distorted threads.
Replace broken or bent studs, and studs that are badly corroded.
Also replace the stud on each side of the damaged stud. If two or
more studs in the hub are damaged, replace all the studs in the hub.
Broken studs are usually an indication of either excessive or
inadequate wheel nut torque.
WARNING
Take care that you do not damage stud threads. Studs with
damaged threads can strip or cross-thread, which will reduce
clamp load, loosen studs and cause a wheel to separate from
the vehicle. Serious personal injury and damage to
components can result.
Replace bent, loose, broken or stripped studs. When you
replace a stripped stud, always replace the stud on each side
of the stripped stud as well. Even if the adjoining studs are not
cracked, they have sustained fatigue damage, which can
cause the wheels to loosen and separate from the vehicle.
Serious personal injury and damage to components can result.
You must correctly support the hub when you remove or install
a stud. If you do not support the hub correctly, serious personal
injury and damage to components can result.
Do not use a hammer to remove or install studs while the hub
is on bearings. A hammer can cause impact damage to the
bearing raceway, which will reduce bearing life. Serious
personal injury and damage to components can result.
Ensure that you do not damage stud threads during installation
procedures. Damaged threads will not allow the stud to
provide the required clamp to support the wheel retention
system. The wheels can loosen and separate from the vehicle.
Serious personal injury and damage to components can result.
Stud Removal
1. Wear safe eye protection.
2. Place the clean hub in a shop press.
3. Support the inboard side of the flange adjacent to the stud
head and perpendicular to the press cylinder.
4. Use a press on the threaded end of the stud to force the stud
out of the flange.
12 Meritor Maintenance Manual MM-0637 (Revised 07-12)
Stud Installation
1. Wear safe eye protection.
2. Support the outboard side of the flange close to the stud hole
and perpendicular to the press cylinder.
CAUTION
Always replace the studs with the same part number as those
removed. Damage to components can result.
3. Always replace the studs with the same part number as those
removed. Damage to components can result. Press the new
stud all the way into the hub. Verify that the stud is fully seated
and that the stud head is not embedded into the hub.
If the stud head is embedded into the hub: Replace the
hub.
4. Examine the hub flange to verify the studs are not damaged,
and make sure the flange was not damaged during the stud
installation process.
If the flange is damaged: Replace the hub.

Anti-Lock Braking System (ABS) Tooth Wheel

1. Wear safe eye protection.
2. Inspect the ABS tooth wheel for any damage that may have
occurred during operation or hub removal.
If the ABS tooth wheel is damaged: Identify the cause
and correct the problem. Use the following procedure to
remove the damaged wheel and install a new wheel.
3. Be careful while using a small pry bar or hammer to remove
the wheel from the hub. It could bend and damage both
components. Use a circular pattern around the wheel to
remove it from the hub. Figure 4.7.