Output Shaft Bearing Preload
CAUTION:
Output shaft bearing preload must be checked and/or adjusted if any of the following components are replaced: rear planetary carrier and output shaft, output shaft bearings or transaxle case. Output shaft bearing preload is determined by measuring output shaft rotating torque.
- Install NEW bearing races for output shaft in transaxle case. Press NEW bearing on output shaft. Install NEW rear bearing for output shaft and Plate (6618-A) on rear of transaxle case. See Fig 1 . Slightly tighten retaining bolts on plate until bolt heads are below surface of plate. DO NOT fully tighten bolts.
- Place transaxle case in press so plate is supported. Ensure clearance is present so output shaft can extend through plate when installed.
- Original output shaft shim should be used as a starting point for adjusting bearing preload. If original output shaft shim is not available, use output shaft shim with thickness of .238-.239" (6.04-6.07 mm). This is thickest shim available.
- Apply small amount of petroleum jelly to original output shaft shim. Install output shaft shim on output shaft, just above bearing. Install output shaft in transaxle case. Press output shaft into rear bearing and transaxle case.
- Install NEW output shaft nut on output shaft. DO NOT reuse old output shaft nut. Install Holder (6497) on output shaft nut. Using torque wrench and Adapter (6498), tighten output shaft nut by rotating torque wrench and output shaft counterclockwise. See Figure . Tighten output shaft nut to specification. See TORQUE SPECIFICATIONS .
- Using INCH-lb. torque wrench, measure output shaft rotating torque required to rotate output shaft to determine output shaft bearing preload. Output shaft rotating torque should be 1-8 INCH lbs. (.1-.9 N.m).
- If output shaft rotating torque exceeds specification, install thicker output shaft shim. If output shaft rotating torque is less than specified, install thinner output shaft shim. Output shaft shims are available in 15 thickness ranging from .204" (5.17 mm) to .239" (6.06 mm) in approximate .001" (.025 mm) increments.
- Ensure no end play is present on output shaft. Once correct output shaft rotating torque is obtained, use press and Staking Adapter (6639) to stake output shaft nut against output shaft. Ensure staked area on output shaft nut is fully bottomed in groove area on output shaft. Remove transaxle case from press. Remove plate from rear of transaxle case.