6. Rotate the wormshaft by hand until the ball
nut is about in the center of
travel. This is to make sure
that the rack and sector will engage properly, with the center tooth of the
sector entering the center
tooth space of the nut.
7. Push the side cover assembly, including the
sector shaft and side cover
gasket, into place. After
making sure there is some lash between the rack and sector teeth, assemble and
tighten the side cover
Adjustment of Steering Gear on Bench
1. Tighten the worm bearing thrust screw until
all wormshaft end-play has been
removed. Then tighten the lock
2. Install the steering wheel on the wormshaft
temporarily. Carefully turn
the steering wheel all the way
in one direction and then back about one turn.
3. Using a J-544 steering gear checking scale,
at right angle to one spoke at
wheel rim, measure the pull
required to keep the wheel in motion. This should be between 1 and 1-1/2
pounds. If necessary,
adjust the worm thrust screw until the proper pull is
4. Turn the steering wheel from one stop all
the way to the other, counting
the number of turns. Then turn
the wheel back exactly half the number of turns to the center position and
mark the wheel at the top or
bottom with a piece of tape.
5. Turn the sector lash adjuster screw
clockwise to remove all lash
between rack and sector teeth.
Tighten the lock nut.
NOTE—Be sure adjustment is not
changed while tightening the lock nut.
6. Using the J-544 steering gear checking
scale, check the pull at the rim of the steering wheel. Take the highest reading on the scale as
the wheel is pulled
through the center position. This should be between 2 and 2-1/2
7. If necessary, readjust the lash adjuster
screw to obtain the proper pull. Tighten the lock nut and again check for proper
8. Fill the assembly with Steering Gear, "All
Purpose," or '"Universal"
gear lubricant to the level of
the filler plug hole and replace the filler plug.
proper adjustments have been made and
the steering gear lubricated, the assembly is ready to be replaced in the truck. In doing
this make sure that no "bind" is set up when tightening the mounting bolts and mast jacket to