Powertrain Assembly Service

Fig. 4 Exploded view of Chrysler Constant Control power steering gear:

Fig. 5 Reaction seal removal:

Fig. 6 Cylinder head oil seal ring removal:

DISASSEMBLE
1. Place powertrain vertically in a suitable soft jawed vise to prevent damage to piston assembly. To retain 33 worm bearing needle roller bearing during housing head removal, use arbor tool No. C-3929.
2. Raise housing head until worm shaft oil seal clears top of worm shaft, then position tool No. C-3929 on top of worm shaft and into seal. Raise housing head until arbor is positioned in bearing, then remove housing head and arbor. bearings become dislodged during head removal, retain in housing head using a suitable grease for installation. If necessary to replace worm shaft oil seal, perform operation with housing head installed in gear housing.
3. Remove large O-ring from housing head, then the reaction seal from groove in housing head face by forcing compressed air into ferrule chamber.
4. Remove reaction spring, reaction ring, worm balancing ring and spacer, then retain worm shaft rotation and remove nut from knurled section.
5. Remove thin upper bearing race, then the thrust bearing.
6. Remove center bearing race, then the lower thrust bearing and thick race.
7. Remove lower reaction ring and spring, then the cylinder head assembly.
8. Remove two cylinder head outer groove O-rings, then the reaction O-ring from groove in face of cylinder head by forcing compressed air into oil hole located between the two O-ring grooves. Remove snap ring and seal.
9. Remove snap ring, sleeve and rectangular oil seal ring from cylinder head counterbore.
10. Ensure torque required to rotate worm shaft throughout its full travel in or out of piston does not exceed 1.5 inch lbs. The worm and piston assembly are serviced as a complete unit and should not be disassembled.

Fig. 4 Exploded view of Chrysler Constant Control power steering gear:

ASSEMBLE
1. Seat piston ring in its groove by pressing down on piston, opening the ends for proper locking action.
2. Vertically position piston assembly (worm shaft side up) in a suitable soft jawed vise, then lubricate two large O-rings with a suitable lubricant. Install O-rings into cylinder head grooves.
3. Install worm sleeve seal, sleeve and snap ring, if removed, then install lower reaction O-ring seal in cylinder head groove.
4. Slide cylinder head assembly ferrule side up on worm shaft, then inspect worm shaft seal ring to ensure gap is closed to avoid ring damage as cylinder head contacts piston flange.
5. Lubricate the following parts with a suitable power steering fluid, then install in order as follows:
a. Thick lower thrust bearing race.
b. Lower thrust bearing.
c. Lower reaction spring, ensuring small hole is over ferrule.
d. Lower reaction ring with flange up so ring protrudes through reaction spring and contacts O-ring in cylinder head.
e. Center bearing race.
f. Upper thrust bearing.
g. Thin upper thrust bearing race.
h. New worm shaft thrust bearing adjusting nut (do not tighten).
6. Rotate worm shaft clockwise 1/2 turn, then retain worm shaft in position with splined nut, tool No. C-3637 and a suitable socket wrench.
7. Torque adjusting nut to 50 ft lb to pre-stretch worm shaft threads.

Fig. 7 Center bearing preload check:

Fig. 8 Staking worm shaft bearing adjustment nut:

Fig. 9 Installing reaction seal & O-ring:

8. With worm shaft in retained position as described in step 6, loosen adjusting nut, then place several rounds of cord around center bearing race. Make a loop in one end of cord, then attach a spring scale to loop. Pull cord using spring scale, which will cause bearing race to rotate. Tighten worm bearing adjusting nut while pulling on scale until a reading of 16 to 24 ounces is obtained while race is turning.
9. With worm shaft in retained position as described in step 6, stake upper part of worm shaft adjusting nut into knurled area of shaft, then hold a 1/4 inch flat end punch on center line of worm shaft end at a slight angle. Strike punch, then check preload. If adjusting nut moved during staking operation, correct by striking with a glancing blow in direction required to regain proper preload. If proper preload was obtained, stake locknut in three more locations 90° apart. Test for proper staking by applying 20 ft lb of torque in each direction on locknut. If movement does not occur, staking is satisfactory.
10. Position spacer assembly over center race, engaging race slot with dowel pin and spacer slot over cylinder head ferrule. Ensure valve lever hole in center bearing race is aligned with center spacer.
11. Install upper reaction ring on center race, then the spacer with flange down against spacer.
12. Install upper reaction spring over reaction ring with cylinder head ferrule through hole in reaction spring.
13. Install worm balancing ring inside upper reaction ring without flange, then apply a suitable lubricant to ferrule O-ring and insert into groove on cylinder head ferrule.
14. If oil seal was removed from housing head, install new seal using tool No. C-3650, ensuring lip of oil seal faces bearing and seal is driven inward until tool bottoms on support.
15. Apply a suitable lubricant to reaction seal, then insert into groove on face of housing head with flat side of seal out. Install housing head O-ring.
16. Slide housing head over worm shaft, engaging cylinder head ferrule and O-ring and ensuring reaction rings enter circular grooves in housing head.