Chevrolet 1988 Light Duty Truck Repair Manual page 127

9. DISASSEMBLE AND ASSEMBLE RACK
PISTON
DISASSEMBLE
1 D isassem ble parts
1 Assem ble parts
as shown
2 Clean and inspect
NOTICE:
all parts for
balls are sm aller than the
excessive wear
silver balls The black
and silver balls must be
installed alternately into
the rack-piston and
return guide to m aintain
rack piston to worm gear
preload
I— TEFLON SEAL AND O" RING-
II replaced lubricate new seal
and O' ring w ith power
steering fluid.
Turn w orm until w orm groove
is aligned w ith the low er
ball return guide hole
B efore a s s e m bling rack
in housing, ball retainer
J-21552 must be inserted
into rack to allow
removal of worm
Figure 27— Removing and Installing the Rack Piston and Pitman Shaft Seals and Bearing
ASSEMBLE
as shown.
The black
W O R M — Slide all the way
into the rack-piston —
Lu bricate balls w ith
pow er steering fluid
Install balls, through
ball return guide hole,
w hile rotating worm
cou nterclo ckw ise
GUIDE— Alternately
install rem ainder of
balls and retain with
grease at each
end of guide
CLAMP
SCREW -Tighten
to 5 Newton Metres
(4 Ft. Lbs )
POWER STEERING 3B3-13
10. REMOVE AND INSTALL PITMAN SHAFT
SEALS AND BEARING
R
e m o v e
1. Clean end of housing 1 Coat seal lip and washer face
thoroughly to prevent dirt
with anhydrous calcium grease.
from entering and be
2 Install parts as shown
extremely careful not to
score the housing bore.
2. Use screw driver to
remove pitman shaft
dust seal.
3. Remove retaining ring
with snap ring pliers
NEEDLE BEARING
J-4245.
Remove only if it
4. Using screw driver, pry
needs replacing.
seals and washers
from bore.
SEAL BACK-UP
WASHER
PITMAN SHAFT
DUST SEAL
PITMAN SHAFT SEAL-
Removmg bearing
------------------- !
Installer
J-8092
Installer
J-22407
When tool bottom s on
housing bearing is
fully installed
Install Pitman shaft seals.
Install Pitman shaft bearing.
in s t a l l
HOUSING ASSEMBLY
Inspect fo r burrs.
F-04606