Hyundai HL955 Manual page 145

3) 3) DRIVE LINE DRIVE LINE
Problem
E x c e s s i v e d r i v e l i n e
vibration or noise
Cause
Yokes not in line on drive shafts.
Worn front drive line support
bearing.
Bent drive shaft.
Loose yoke retaining nuts (drive
shafts wobble at high speed).
Rear axle oscillating support.
Lack of lubrication.
3-89
Remedy
Inspect. Align drive shaft yokes.
Inspect, repair.
Inspect all drive shafts. Replace.
Inspect. Replace.
Inspect, repair.
Lubricate with proper grade of grease.