Radius Arm: Service and Repair
Radius Arm - F-450, F-550Radius Arm - F-450, F-550:
CAUTION: Suspension fasteners are critical parts because they affect performance of vital components and systems and their failure can result in major service expense. They must be replaced with the same part number or an equivalent part if replacement is necessary. Do not use a replacement part of lesser quality or substitute design. Torque values must be used as specified during reassembly to make sure of correct retention of these parts.
1. Remove the shock absorber.
2. CAUTION: Tighten the radius arm front nuts with the suspension at curb height.
Remove and discard the 2 radius arm front nuts and bolts.
^ To install, tighten to 300 Nm (222 ft. lbs.).
3. CAUTION: Tighten the radius arm rear nut with the suspension at curb height.
Remove and discard the radius arm rear nut and bolt.
^ To install, tighten to 300 Nm (222 ft. lbs.)
4. Remove the radius arm.
5. To install, reverse the removal procedure.