MCi Crusader II 1989 Maintenance Manual page 358

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MC-9 .MAINTENANCE MAN.UAL
INSPECTION
All sealing surtaces and seal cavities must be free from nicks
and corrosion. If you detect any nicks or corrosion. you must
replace the part to ensure proper sealing. Before you inspect
the steering gear. wash all parts in clean. clear solvent and blow
dry with compressed air.
1. Inspect rack piston (10) teeth for cracks and wear. If you
can detect a step by running your fingernail edge horizontally
across the teeth surtace, replace the rack piston.
2. Inspect the rack piston ball track grooves (helical shaped)
for brinelling (dents) or spalling (flakes) (figure 11 -48). If either
condition exists, the rack piston (10), valve sleeve (Sb). sector
Figure 11-48. Location
of Ball Track
Grooves in
Rack
Piston.
shaft (39) and worm shaft (Sa) must all
be
replaced.
3. Inspect the worm shaft (Sa) ball track grooves (helical
shaped) for brinelling or spalling. See figure 11-49 for an exam-
ple of how ball sits property on the track and normal machine
marks on the shaft
Figure 11-49. Worm Shaft
with Ball in Track.
4. Visually inspect the upper input shaft seal area near serra-
tions for nicks, and run your fingernail edge across the sealing
surlace to detect steps.
NOTE: The Input lhaft la pinned to the
worm shaft by a torsion bar pin, and the
worm shaft/Input ah•ft .... mbly la flexible
at this Joint. As a rnult, the auembly may
be allghUy bent •t this joint. Thia alight
bend la normal.
As you inspect the tlousing cylinder bore, you will notice
scoring marks running lengthwise through the bore. This scor•
ing is normal. The scoring in the steering gear cylinder should
not be compared to the scoring you might see in the cylinder
bores of an internal combustion engine.
5. Check the housing (1) faces for nicks which would pre-
vent proper seating. Replace the housing if these nicks are
present (figure 11-50).
6. Inspect the housing bearing (2) for brinelling or spalling
(figure 11-51). If either condition exists, or if one or more of the
rollers is lost. replace the bearing (figure 11-53).
Figure 11-50. Inspect for Nicks.
Figure 11-51. Inspect Housing Bearing.
7. Inspect the sector shaft (39) bearing sealing areas for
brineliing or spalling. Run your fingernail edge across these
areas to detect steps. Inspect for cracks. If any of these condi-
tions exist. replace the sector shaft (figure 11-52).
Figure 11-52. Shaft Bearing Seal Area.
8. lnspectthe thrust bearing rollers (23) for any deterioration.
Inspect the two thrust washers (22) for brinelting, spalling or
cr~cks. Replace any part if you detect these conditions (figure
11-53).