Assembly

Lubricate all seals, bushings, bearings and gears with multi-purpose gear lube prior to installation.
1. Position ball nut over worm shaft so that deep side of teeth will be toward side cover when installed in gear housing.
2. Install exactly 1/2 the number of balls in each circuit, rocking worm shaft slightly to aid in installing balls.
3. Place about six balls in each return guide, using grease to hold balls in place.
4. Install return guides, clamp and screw.
5. Rotate worm through its complete travel several times to be sure balls are installed correctly and rotate freely.
6. Place upper bearing on worm shaft and slide worm shaft assembly into housing.
7. Place lower bearing in worm bearing adjuster and install bearing retainer.
8. Install adjuster assembly and locknut in housing. Tighten adjuster only enough to hold worm bearings in place. Final adjustment will be made later.
9. Turn worm shaft until center groove in ball nut lines up with center of pitman shaft bushing.
10. Install pitman shaft and lash adjuster with shim so that center tooth meshes with center groove in ball nut.
11. Install side cover with gasket on lash adjuster by turning adjuster counterclockwise.
12. Install side cover bolts and washers.
13. Turn lash adjuster so that teeth on shaft and ball nut engage but do not bind.
14. Install lash adjuster locknut loosely.
15. To protect pitman shaft seal from damage, cover shaft splines with masking tape. Slide new seal into place and seat it against shoulder in housing.
16. Install new worm shaft seal flush with surface of housing.
17. Fill gear housing with multi-purpose lubricant and adjust gear assembly as outlined previously.