Inspection
1. Inspect the locking ring and gear
A. Inspect the inside surface of the ring for wear.
B. Inspect the synchronizer sleeve teeth and corresponding teeth on the synchronizer ring for wear (rounding)
Good
Worn out
C. Inspect the hub teeth and corresponding teeth on the gear for wear (rounding)
Good
Worn out
D. Inspect the end surface of the hub gear for wear.
E. Inspect the tapered surface for wear and scoring.
F. Inspect the teeth on all gears for uneven wear, scratches, abrasions and cracks
2. Apply oil to the beveled surface of the gear and place the synchronizer ring on the mating gear. Rotate the ring to make sure it does not slip.
Measure the clearance between the locking ring and the gear around the entire circumference.
Note: When measuring the gap, keep the synchronizer ring on the gear evenly.
Clearance between ring and gear
- Standard: 0.73-1.18mm
- Operating limit: 0.4 mm
Clearance between double cone of synchronizer and gear:
Standard:
- A: (between the outer ring and the cone) 0.5-1.1 mm
- IN: (between the cone and the gear) 0.5-1.0 mm
- WITH: (outer ring and gear) 0.95-1.68 mm
Operating limits:
- A: 0.3 mm
- H: 0.3mm
- C: 0.6 mm
If the gap is less than the operating limits, replace the synchronizer ring and cone.
