Center Case
INSPECTIONSub-oil Pump
1. Check inner and outer circumference, tooth face, and side face of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between oil pump housing edge and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measurement is out of specification, replace inner and outer gears together with new ones as a set.
Specification: 0.015 - 0.035 mm (0.0006 - 0.0014 inch)
Main Oil Pump
1. Check inner and outer circumference, tooth face, and side face of inner and outer gears for damage or abnormal wear.
2. Measure side clearance between oil pump housing edge and inner gear/outer gear.
3. Make sure side clearance is within specification. If the measurement is out of specification, replace inner and outer gears with new ones as a set.
Specification: 0.015 - 0.035 mm (0.0006 - 0.0014 inch)
Mainshaft
- Check surfaces which contact sun gear, clutch drum, clutch hub, press flange, clutch piston, each bearing, etc. for damage, peel, partial wear, dents, bending, or other abnormal damage. If any is found, replace with new one.
Control Valve
- Check oil filter screen for damage. If any is found, replace with new one.
- Check resistance between terminals of 4WD solenoid valve, 2-4WD shift solenoid valve and transfer fluid temperature sensor.
- Check sliding faces of control valves and plugs for abnormality. If any is found, replace the control valve assembly with new one.
CAUTION: Replace control valve body together with clutch return spring as a set.
- Check each control valve spring for damage or distortion, and also check its free length, outer diameter and wire diameter. If any damage or fatigue is found, replace control valve body with new one.
- Replace control valve body together with clutch return spring as a set.
Clutch
- Check drive plate and driven plate facings for damage, cracks or other abnormality. If any, replace with new one.
- Check the thickness of drive plate and driven plate facings.
CAUTION:
- Measure facing thickness at 3 points to take an average.
- Check all the drive and driven plates.
- Check return spring for damage or deformation.
- Check stamped mark shown in the figure. Then, check that free length, outer diameter and wire diameter are within specifications. If any abnormality is found, replace with new return spring assembly of the same stamped number.