Worm Shaft

Fig. 1 Oil level check:

OIL LEVEL CHECK

Oil surface should be up to level as shown in Fig. 1. If not, add suitable lubricant as necessary.

Fig. 2 Steering gear box adjusting bolt:

ADJUSTMENT OF WORM SHAFT

The steering gear box is provided with a adjusting bolt (1), Fig. 2, which provides preload to selector shaft. If necessary, adjust as follows:
1. Check worm shaft to ensure that it is free from thrust play.

Fig. 3 Positioning pitman arm:

2. Position pitman arm so it is parallel with worm shaft as shown in Fig. 3. With pitman arm in this position, front wheels should be in a straight forward position

Fig. 4 Measuring worm shaft torque:

3. Using a suitable spring scale, measure worm shaft starting torque as shown in Fig. 4. Starting torque should be 3.48-5.80 lbs.

4. If torque is not as specified, adjust adjusting bolt (1), Fig. 2, until torque is as specified.

5. If worm shaft starting toque is within specifications, check worm shaft operating torque in its entire operating range (turning worm shaft all the way to the right and left) as shown in Fig. 4.



6. Worm shaft operating torque should be under 6.96 lbs. If torque is not as specified, readjust worm shaft starting torque in a straight forward position using adjusting bolt (1), Fig. 2, then recheck worm shaft operating torque.
7. If specification is not as specified after readjustment, replace gear box.