Drive Pinion Shaft: Assembly

Measure dimension "A" of the drive pinion shaft.
ST 398643600 GAUGE

Fig 1: Measuring Dimension "A" Of Drive Pinion Shaft
Using a press, force-fit the roller bearing in position.
CAUTION: Do not change the relative positions of the outer race and bearing cone.

Fig 2: Installing Roller Bearing Into Position
After fitting the O-ring to the shaft, attach the drive pinion collar to the shaft.
CAUTION: Be careful not to damage the O-ring.
Tighten the lock washer and lock nut with ST1, ST2 and ST3.
ST1 498937110 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER

Actual tightening torque: 116+/-5 N.m (11.8+/-0.5 kg-m, 85.3+/-3.6 ft-lb)
NOTE:
- Pay attention to the orientation of lock washer.
- Tightening torque using torque wrench is determined by the following equation.
  T₁ = L/_{L + 72.2} X T
  
  T: Actual tightening torque
- Install ST2 to torque wrench as straight as possible.
  
  Fig 3: Installing (ST2) To Torque Wrench As Straight As Possible
Measure the starting torque of the bearing. Make sure the starting torque is within the specified range. If out of the allowable range, replace the roller bearing.
Starting torque: 0.3 - 2.0 N.m (0.03 - 0.2 kg-m, 0.2 - 1.4 ft-lb)

Fig 4: Measuring Starting Torque Of Bearing
Stake the lock nut securely at two places.
Measure dimension "B" of the drive pinion shaft.
ST 398643600 GAUGE

Fig 5: Measure Dimension "B" Of Drive Pinion Shaft
Determine the thickness "t" (mm) of the drive pinion shim.
NOTE: The number of shims must be three or less.

t = 6.5+/-0.0625 - (B - A)

Fig 6: Determining Thickness "t" (mm) Of Drive Pinion Shim