Bendix Commercial Vehicle Systems C-300N HYDRAULIC POWER STEERING1/99 - Manual (Page 23)

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FIGURE 49 - INSTALLING NEW STYLE BALL RETURN TUBE &
BALLS
Before proceeding further, identify the type of ball return
tube that is being installed.
If the OLD STYLE ball return tube is in use, PROCEED
TO STEP 19. If the NEW STYLE ball return tube is in
use, PROCEED TO STEP 21.
OLD STYLE BALL TUBE
19. Insert the valve body and spindle assembly (3) all the
way into the piston (23) making certain that the stroke
limiting stem (13) is not damaged and that it mates with
the valve seat (17) in the piston (23). Insert nineteen of
the balls (9), one at a time, into one of the recirculating
tube holes in the ball return opening in the piston. Rotate
the input shaft end of the spindle (3) slightly after each
ball is inserted. Rotate the spindle in one direction only
and do not alternate from clockwise to counterclockwise.
Note: When this operation is performed correctly, the
spindle and valve body should screw out of the piston
and the balls inserted in one recirculating tube hole
should appear at the opposite hole. Before proceeding,
make certain the balls are at an equal depth in both
holes of the piston. This will assure correct installation
of the return tube (35). Figure 25.
CAUTION: The utmost care must be taken with these
steps. Incorrect assembly of this group may result in
one or more balls failing inside the piston or coming out
at the top and lodging in the housing.
20. Install the remaining seven balls (9) in the recirculating
tube halves (35), and use lithium base grease to retain
them in the tube. Seat the assembled tube halves (35)
containing the seven balls in the recirculating tube holes
in the piston (23). Lightly grease the sealing surfaces
of the tube cover(24) and install it in the piston making
certain the slot in the underside of the cover mates with
the recirculating tube in the piston. Install the retaining
ring (36) in the piston to secure the tube cover making
certain it is completely seated in its groove. After
assembly, check for smooth rotation of the spindle
assembly in both directions. Figure 21, 22, 24 & 48.
NEW STYLE BALL TUBE
21. Insert the valve body and spindle assembly (3) all the
way into the piston (23) making certain that the steering
limiting stem (13) is not damaged and that it mates with
the valve seat (17) in the piston (23). Pull the valve and
spindle assembly (3) out of the piston (23) about two
inches, MAKING CERTAIN THE STEERING LIMITING
STEM (13) REMAINS ALIGNED WITH VALVE BALL
AND SEAT (17). Make certain the spindle threads will
not interfere with the ball pick-up tabs on the ball tube
(35) when it is inserted into the tube holes in the piston
(23). The spindle’s threads are visible at the bottom of
the tube holes in the piston. Figure 49 Insert the ball
return tube halves (35) all the way into the holes in the
piston. If the ball return tube is properly installed, the