Inspection [09/2015 - ]: Procedure
- INSPECT PRELOAD
- Inspect Driven Pinion Preload:
- Using SST and a torque wrench, measure the preload of the backlash between the driven pinion and ring gear.
*a Torque Wrench Fulcrum Length - SST: 09326-20011
Preload (at Starting)
0.5 to 0.9 N*m (5 to 9 kgf*cm, 4 to 8 in.*lbf)
HINT:
- Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.
Refer to PRECAUTION [09/2015 - 12/2017] , or refer to PRECAUTION [12/2017 - 08/2019] , or refer to PRECAUTION [08/2019 - ]
- When using SST (fulcrum length of 50 mm (1.97 in.)) + torque wrench (fulcrum length of 130 mm (5.12 in.)):
0.3 to 0.6 N*m (3 to 6 kgf*cm, 3 to 5 in.*lbf)
- Using SST and a torque wrench, measure the preload of the backlash between the driven pinion and ring gear.
- Inspect Total Preload:
- Using SST and a torque wrench, measure the total preload.
- SST: 09326-20011
Preload (at Starting)
0.3 to 0.5 N*m (3 to 5 kgf*cm, 3 to 4 in.*lbf) + Driven pinion preload
HINT:
- Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.
Refer to PRECAUTION [09/2015 - 12/2017] , or refer to PRECAUTION [12/2017 - 08/2019] , or refer to PRECAUTION [08/2019 - ]
- When using SST (fulcrum length of 50 mm (1.97 in.)) + torque wrench (fulcrum length of 130 mm (5.12 in.)):
0.22 to 0.36 N*m (2.2 to 3.7 kgf*cm, 1.9 to 3.2 in.*lbf) + Driven pinion preload
- Using SST and a torque wrench, measure the total preload.
- Inspect Driven Pinion Preload:
- INSPECT RING GEAR BACKLASH
- Set a dial indicator perpendicular to a ring gear tooth tip.
- Using a dial indicator, check the ring gear backlash.
Backlash
0.14 to 0.25 mm (0.00551 to 0.00984 in.)
If the backlash is not within the specification, adjust the side bearing preload or repair as necessary.
NOTE:Check at least 3 positions on the circumference of the ring gear.
- Set a dial indicator perpendicular to a ring gear tooth tip.
- INSPECT TOOTH CONTACT BETWEEN RING GEAR AND DRIVEN PINION
- Apply a light coat of Prussian blue evenly to both sides of all teeth.
- Rotate the ring gear 10 times or more.
- Rotate the ring gear to inspect the tooth contact pattern.
*a Proper Contact *b Heel Contact *c Face Contact *d Toe Contact *e Flank Contact - - NOTE:Check at least 4 positions on the circumference of the ring gear.
HINT:
Prussian blue shown in the illustration indicates the tooth contact pattern.
- If the tooth contact pattern is not correct, select a new transfer output shaft washer that is thicker or thinner as necessary and recheck.
- Apply a light coat of Prussian blue evenly to both sides of all teeth.
- INSPECT RUNOUT OF RING GEAR
- INSPECT TRANSFER RING GEAR MOUNTING CASE