Chevrolet 1973 Overhaul Manual page 448

P O S IT IO N W O R M PIN
IN VALVE B O D Y N O T C H
Fig. 55-Valve to Worm Alignment
Fig. 56-lnstalling Valve Body
c. With Ball Retainer J-7539 in place in the rack-
piston, push the rack-piston (with teeth toward
pitman shaft opening), into the housing until
Tool J-7539 contacts the center of worm (fig. 59).
d. Turn the stub shaft clockwise with a 3/4" twelve
point deep socket or box end wrench to thread
the rack-piston onto the worm while holding
Tool J-7539 against the end of the worm.
e. When the rack-piston is completely threaded on
the worm, remove Ball Retainer J-7539 and Seal
Compressor J-8947 (Cars) or J-7576 (Trucks).
5. Install the pitman shaft and side cover as follows:
a. Install a new "O" ring in the pitman shaft side
cover and retain with chassis lubricant.
b. Turn the stub shaft until the rack-piston teeth
are centered in the pitman shaft opening, then
install the pitman shaft and side cover so that
CHEVROLET OVERHAUL MANUAL
VALVE
B O D Y
Fig. 57-Valve Body Position in Housing
Fig. 58-lnstallin g Adjuster Plug
J-8947 (CARS)
J-7576 (TRUCKS)
Fig. 5 9 - Insta llin g Rack-Piston
STEERIN G 9-23
OIL RETURN
HOLE
A D JU STE R
J-6222
RACK-PISTON
J-7539