Drive Pinion Shaft: Assembly

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

Fig 1: Measuring Dimension "A" Of Drive Pinion Shaft
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Using a press, force-fit a new roller bearing in position.
NOTE: If too much pressure is applied, the roller bearing will not turn easily.

Fig 2: Forcing-Fit Roller Bearing In Position Using Special Tool
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After fitting a new O-ring to the shaft, attach the drive pinion collar to the shaft.
Install the lock washer to drive pinion shaft in proper direction.
Tighten a new lock nut with ST1, ST2 and ST3.
Calculate lock washer and lock nut specifications using the following formula.

T2 = L2/(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:

Fig 3: Installing Lock Washer To Drive Pinion Shaft
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ST1 498937110 HOLDER

ST2 499787700 WRENCH

ST3 499787500 ADAPTER

NOTE: Install ST2 and torque wrench as straight as possible.

Fig 4: Identifying ST2 & Torque Wrench Installing Dimension
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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.
1. Starting torque: 7.6 - 38.1 N (0.776 - 3.88 kgf, 1.7 - 8.6 lb)
Fig 5: Measuring Starting Torque Of Bearing
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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
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The thickness "t" (mm) of the drive pinion shim.
t = 6.5+/-0.0625 - (B - A)
Select three or less shims from following table.

Fig 7: Pinion Shims Specifications
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