17-12. Cleaning, Inspection and Repair
a. Discard all seal and preformed packing. Replace
with new ones in assembly.
b. Clean all metal parts with cleaning solvent, (Fed.
P-D-680, or equivalent); dry thoroughly with
Inspect all parts for cracks, chips or excessive
wear. Replace parts as required.
d. Replace steering gear worm shaft if bent or
Never attempt to straighten a bent worm shaft.
Reassembly and Installation
a. Refer to figure 17-7 and reassemble the steering
worm gear box as follows:
(1) Place the ball nut (29) over worm shaft (21).
Ball guide holes of the ball nut shall be up and the shallow
end of the rack to the left from the steering wheel position.
(2) Install balls (28) into ball nut (29) and guides
Figure 17-9. Filling ball nut circuits and guides
(27) as follows:
(a) Place 45 balls (28) equally into two separate
containers (fig. 17-9).
(b) Place balls into guide holes while turning the
worm gradually away from that hole. (Fill only one
circuit at a time.)
(c) Continue until the circuit is full from the bottom of
one hole to the bottom of the other.