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.

NOTE: If too much pressure is applied, the roller bearing will not turn easily.

Fig 2: Force-Fitting Roller Bearing In 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.
Calculate lock washer and lock nut specifications using the following formula.

T2 = L1/(L1 + L2) x T1

T1: 116 N.m (11.8 kgf-m, 85.3 ft-lb)

[Required torque setting]

T2: Tightening torque

L1: ST2 length 0.072 m (2.83 in)

L2: Torque wrench length

Example: See Fig 3 .

Fig 3: Tightening Torque Chart

ST1 498937110 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER
NOTE:
- Pay attention to the orientation of lock washer.
- Install ST2 to torque wrench as straight as possible.
Fig 4: Identifying L1 & L2 - ST1, ST2 & ST3
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:
1. 0.3 - 2.0 N.m (0.03 - 0.2 kgf-m, 0.2 - 1.4 ft-lb)
Fig 5: 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 6: Measuring 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 7: Drive Pinion Shim Chart