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Maintenance: NVH Infiniti QX50 I

Procedures 6 illustrations ~447 words

APPEARANCE AND NOISE

  1. Check the propeller shaft tube surface for dents or cracks. If damaged, replace propeller shaft assembly.
  2. If center bearing is noisy or damaged, replace propeller shaft assembly.

VIBRATION

If vibration is present at high speed, inspect propeller shaft runout first.

Scheme 31

Scheme 31: VIBRATION
Scheme 31: VIBRATION

Scheme 32

Scheme 32
Scheme 32
  1. With a dial indicator, measure propeller shaft runout at runout measuring points by rotating final drive companion flange with hands. Propeller shaft runout: Refer to " «PROPELLER SHAFT RUNOUT»(ref-617014-S25683204542014052000000) ". Propeller shaft runout measuring point (Point "delta") Dimension A: 381.5 mm (15.02 in)
  2. If runout still exceeds specifications, separate propeller shaft at final drive companion flange; then change the phase between companion flange and propeller shaft by the one bolt hole at a time and install propeller shaft.
  3. Check runout again. If runout still exceeds specifications, replace propeller shaft assembly.
  4. Check the vibration by driving vehicle.
  1. Check the propeller shaft tube surface for dents or cracks. If damaged, replace propeller shaft assembly.
  2. If center bearing is noisy or damaged, replace propeller shaft assembly.

If vibration is present at high speed, inspect propeller shaft runout first.

Scheme 33

Scheme 33: VIBRATION
Scheme 33: VIBRATION

Scheme 34

Scheme 34
Scheme 34
  1. With a dial indicator, measure propeller shaft runout at runout measuring points by rotating final drive companion flange with hands. Propeller shaft runout: Refer to " «PROPELLER SHAFT RUNOUT»(ref-617031-S08126027422014052000000) ". Propeller shaft runout measuring point (Point "delta") Dimension A: 192 mm (7.56 in) B: 172 mm (6.77 in) C: 172 mm (6.77 in)
  2. If runout still exceeds specifications, separate propeller shaft at final drive companion flange; then change the phase between companion flange and propeller shaft by the one bolt hole at a time and install propeller shaft.
  3. Check runout again. If runout still exceeds specifications, replace propeller shaft assembly.
  4. Check the vibration by driving vehicle.
  1. Check the propeller shaft tube surface for dents or cracks. If damaged, replace propeller shaft assembly.
  2. If center bearing is noisy or damaged, replace propeller shaft assembly.

If vibration is present at high speed, inspect propeller shaft runout first.

Scheme 35

Scheme 35: VIBRATION
Scheme 35: VIBRATION

Scheme 36

Scheme 36
Scheme 36
  1. With a dial indicator, measure propeller shaft runout at runout measuring points by rotating final drive companion flange with hands. Propeller shaft runout: Refer to " «PROPELLER SHAFT RUNOUT»(ref-617009-S09677708432014052000000) ". Propeller shaft runout measuring point (Point "delta") Dimension A: 162 mm (6.38 in) B: 245 mm (9.65 in) C: 185 mm (7.28 in)
  2. If runout still exceeds specifications, separate propeller shaft at final drive companion flange or transfer companion flange; then change the phase between companion flange and propeller shaft by the one bolt hole at a time and install propeller shaft.
  3. Check runout again. If runout still exceeds specifications, replace propeller shaft assembly.
  4. Check the vibration by driving vehicle.

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