GMC S Series 1994, Руководство по ремонту

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7. Turn adjuster plug (55) counterclockwise until hole
in adjuster plug (55) is aligned with the second mark
on the housing (20) (see Figure 6).
8. Install adjuster plug lock nut (48).
Tighten
• Adjuster plug lock nut (48) to 109 N*m
(80 lb. ft.) using a drift in a notch.
• Hold ad ju ster plug (55) to m aintain
alignment of the marks.
9. Install steering gear. Refer to “Power Steering Gear
Replacement” in Section 3B.
4 0 -SHAFT, STUB
48 - NUT, ADJUSTER PLUG LOCK
PITMAN SHAFT OVER-CENTER PRELOAD
ADJUSTMENT
Figures 7 thru 9
1. Remove steering gear from vehicle. Refer to
“Power Steering Gear Replacement” in Section 3B.
2. Rotate stub shaft back and forth to drain power
steering fluid.
3. Loosen the adjuster lock nut (8).
4. Turn the pitm an shaft ad ju ster screw
counterclockwise until fully extended, then turn
clockwise 1 full turn.
5. Rotate the stub shaft (40) from stop to stop, using a
12-point socket, and count the number of turns.
6. Starting at either stop, turn the stub shaft (40) back
1
12
the total number of turns. This is the “center” of
the gear.
• When the gear is centered, the flat on the stub
shaft (40) should face upward and be parallel
with the side cover (7) and the master spline
on the pitman shaft should be in line with the
adjuster screw (see Figure 8).
7. Place a torque wrench on the stub shaft (40) with
the handle in the vertical position. Rotate the stub
shaft (40) 45° each side of the center (see Figure 9).
• Stub shaft must rotate smoothly and must not
stick or bind.
• Record the worm bearing preload measured
on or near the center.
• Recorded bearing preload to be 0.7-1.7 N*m
(6-15 lb. in.), with worm and ballnut
installed. If the torque is outside this range,
the gear assembly should be readjusted or
repaired as required.
Notice: See “Notice” on page 3B1A-1 of this section.
Figure 3 Loosening Adjuster Plug Nut
A-INDEX MARK
55 - PLUG,ADJUSTER