Countershaft Idler Gear and 4th Gear Axial Clearance Inspection

Countershaft Idler Gear and 4th Gear Axial Clearance Inspection

1. Install the 40.5 mm cotters (A), the 2nd gear (B), the thrust needle bearing (C), the needle bearing (D), the idler gear (E), the thrust needle bearing (F), the original thickness 61 mm washer (G), the 1st gear (H), the 4th gear (I), the original thickness 50.8 mm collar (J), the 50.8 mm washer (K), the 42.2 mm cotters (L), the cotter retainer (M), and the snap ring (N) on the countershaft (O). Install the 40.5 mm cotters, the idler gear, the 1st gear, and 4th gear in the direction shown.






2. Insert a feeler gauge blade (A) as thick as possible between the 50.8 mm collar (B) and 50.8 mm washer (C).






3. Set the dial indicator (A) on the idler gear (B).






4. Measure the idler gear axial clearance in at least three places while moving the idler gear. Use the average as the actual clearance.

Standard: 0.005-0.040 mm (0.0002-0.0016 in.)

5. If the clearance is out of the standard, remove the 61 mm washer and measure its thickness.

6. Select and install a new washer, then recheck the clearance.

WASHER, 61 mm










7. Measure the clearance between the 50.8 mm collar (A) and the 50.8 mm washer (B) with a feeler gauge (C) in at least three places. Use the average as the actual clearance.

Standard: 0.005-0.040 mm (0.0002-0.0016 in.)

8. If the clearance is out of the standard, remove the 50.8 mm washer and measure its thickness.

9. Select and install a new washer, then recheck the clearance.

WASHER, 50.8 mm