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1.Install the following
special tools to the hub and tighten to the specified
torque.
- Front hub remover and installer (MB990998)
- Spacer (MB991000)
Tightening torque: 270 ± 27
N·m 2.Fix the hub in a vice using a
piece of wood or the like. 3.Rotate the hub to
make the bearing well-greased.
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4.Use the following special
tools to measure the hub rotation starting
torque.
- Preload socket (MB990326)
- Torque wrench (MB990685)
Limit: 1.4 N·m 5.If the
hub rotation starting torque at the specified tightening
torque (270 ± 27
N·m) exceeds the limit, replace the hub. If there are
rough or gritty feelings in rotation,
replace the hub.
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6.Set a dial gauge, and move
the hub in the axial direction to measure the looseness in
the wheel bearing. Limit: 0.05
mm 7.If the wheel bearing looseness at the
specified tightening torque (270 ± 27
N·m) exceeds the limit, replace the hub.
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