Pre-Inspection

Pre-Inspection
Before disassembling the front final drive, drain off oil from final drive assembly and remove the rear cover. Then perform the following inspection.

TOTAL PRELOAD





1. Turn drive pinion in both directions several times to set bearing rollers.
2. Check total preload using Tool.
Tool number : ST3127S000 (J25765-A)
Total preread (with oil seal) : 2.98 - 4.76 Nm (0.31 - 0.48 kg-m, 27 - 42 inch lbs.)

DRIVE GEAR TO DRIVE PINION BACKLASH





Check drive gear to drive pinion backlash using a dial gauge at several points.
Drive gear to drive pinion backlash: 0.13 - 0.18 mm (0.0051 - 0.0071 inch)

COMPANION FLANGE RUNOUT





1. Fit a dial gauge onto the companion flange face (inner side of the propeller shaft mounting bolt holes).
2. Rotate the companion flange to check for runout.
Runout limit : 0.10 mm (0.0039 inch)
3. Fit a test indicator to the inner side of the companion flange (socket diameter).
4. Rotate the companion flange to check for runout.
Runout limit : 0.13 mm (0.0051 inch)
5. If the runout value is outside there pair limit, follow the procedure to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion gear by 90° step, and search for the point where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, replace the companion flange.
c. If the runout value still outside of the limit after the companion flange has been replaced, check pinion bearing and drive pinion assembly.

TOOTH CONTACT
Check tooth contact.