Chevrolet 10 series 1973, Руководство по капитальному ремонту

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STEERIN G 9-19
Fig. 45-V alve Body and S haft Assem bly - Explode
Pitman Shaft and Side Cover
Disassembly
Remove the locknut and unscrew the side cover from the
adjusting screw. Do not attempt to disassemble pitman
shaft. Discard locknut.
Cleaning and Inspection
1. Wash all parts in clean solvent and dry parts with
compressed air.
2. Check pitman shaft bearing surface in the side
cover for scoring. If badly worn or scored, replace
the side cover.
3. Check the sealing and bearing surfaces of the
pitman shaft for roughness, nicks, etc. If minor
irregularities in surface cannot be cleaned by use of
crocus cloth, replace the pitman shaft.
4. Replace pitman shaft assembly if teeth are
damaged or if the bearing surfaces are pitted or
scored.
5. Check pitman shaft lash adjusting screw. It must be
free to turn with no perceptible end play. If
adjusting screw is loose replace the pitman shaft
assembly.
Assembly
Thread the side cover onto the pitman shaft adjusting
screw until it bottoms and then turn in one-half turn.
Install a new adjusting screw locknut, but do not tighten.
Rack-Piston
Disassembly
1. Remove tool J-7539 from the rack-piston.
2. Remove the ball return guide clamp, ball guide and
balls.
3. If necessary to replace the teflon oil seal and "O"
ring, remove at this time.
Fig. 4 6 -ln s ta llin g Stub S haft Assem bly
Cleaning and Inspection
1. Wash all parts in clean solvent and dry with
compressed air.
2. Inspect the worm and rack-piston grooves and all
the balls for scoring. If either the worm or rack-
piston needs replacing, both must be replaced as a
matched assembly.
3. Inspect ball return guide halves, making sure that
the ends where the balls enter and leave the guides
are not damaged.
4. Inspect lower thrust bearing and washers for scores
or excessive wear. If any of these conditions are
found, replace the thrust bearing and washers.
5. Inspect rack-piston teeth for scoring or excessive
wear. Inspect the external ground surfaces for wear,
scoring or burrs.
Assembly
1. If the teflon oil seal and "O" ring were removed,
lubricate a new "O" ring and seal with Power
Steering Fluid and install in groove on rack-piston.
The teflon ring may be slightly loose after
assembly, but will tighten up when subjected to the
hot oil in the system (fig. 47).
2. Slide the worm all the way into the rack-piston. It is
not necessary to have the thrust bearing assembly
on the worm at this time.
3. Turn the worm until the worm groove is aligned
with the lower ball return guide hole (fig. 48).
4. Lubricate the balls with Power Steering Fluid, then
feed 17 balls into the rack-piston, while slowly
rotating the worm counter-clockwise.
IMPORTANT: The black balls are .0005"
smaller than the silver balls. The black and
silver balls must be installed alternately into
the rack-piston and return guide.
5. Alternately install 7 balls into the return guide and
retain with chassis lubricant at each end of guide.
N O T C H IN E N D C A P M U S T FULLY
E N G A G E PIN P R O J E C T IN G IN T O
V A L V E B O D Y
CHEVROLET OVERHAUL MANUAL