Disassembly
1) Remove pump pulley. See POWER STEERING PUMP PULLEY under
REMOVAL & INSTALLATION. Remove shaft bearing retaining ring. See
Fig. 5. Pull shaft and bearing assembly out of pump. If removing
bearing from shaft, measure and record clearance (if any) between
shaft shoulder and bearing inner race. See Fig. 6. Pry shaft seal from
housing.
2) Remove flow control fitting from pump. See Fig. 5. Remove
"O" ring, flow control valve assembly and flow control spring.
3) Insert small punch in access hole, and remove thrust plate
retaining ring. Using a press and 5/8" piece of bar stock, press
against pressure plate hub until thrust plate is removed. Remove "O"
ring, pump ring, pump rotor, vanes and 2 dowel pins.
4) Remove pressure plate using press (if necessary). Remove
"O" ring from pressure plate. Remove dowel pin from housing. Remove
"O" ring from sleeve. Working from pulley side of housing, drive out
sleeve with a punch.
Inspection
Clean all parts in power steering fluid. Inspect pressure
plate, vanes, pump ring, drive shaft and bearing for scoring, pitting
or chatter marks. Replace worn or damaged parts.
Reassembly
1) Press new sleeve assembly into housing. Install new,
lubricated "O" ring into groove in sleeve. Install dowel pin into
housing. Install pressure plate spring. Install new, lubricated "O"
ring into groove in pressure plate.
2) Mark spot on top of pressure plate directly over dowel pin
hole in plate to help align hole with dowel pin. Install pressure
plate into housing, ensuring pin engages hole in pressure plate.
Install 2 pump ring dowel pins.
3) Install pump rotor with counterbore (larger diameter of
center bore) facing pulley end of housing. Insert pump vanes into
rotor slots. With identification marks on pump ring facing upward,
install pump ring over dowel pins. Install new, lubricated "O" ring
into housing groove.
4) Install thrust plate, ensuring dimples in thrust plate
align with mounting holes in housing, and thrust plate holes engage
pump ring dowel pins. Press thrust plate into housing far enough to
install retaining ring. Install retaining ring with opening centered
on mounting boss nearest access hole.
5) Press shaft bearing onto shaft until clearance between
inner race and shoulder is same as clearance recorded during removal.
See Fig. 7. Slide shaft and bearing assembly into housing, rotating
assembly to align splines of shaft and rotor. Install bearing
retaining ring with beveled side down, indicated by position of large
lug on ring. Install pulley on pump.
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