B250 3/4 Ton Van L6-225 3.7L VIN H 1-bbl (1987)
Fig. 28 Stub shaft bearing installation. Model 605
3. If removed, install stub shaft needle bearing and upper thrust bearing.
4. Apply anhydrous calcium grease to stub shaft seal, then install shaft seal, dust seal and snap ring.
5. Install rack piston and valve assembly, then lower thrust bearing, O-ring seal, adjuster plug and lock nut. See procedures for thrust bearing preload
adjustment before tightening lock nut.
6. Install side cover spring and O-ring seal.
7. Install pitman shaft gear so center tooth of gear meshes with center groove of rack piston, then depress side cover and install snap ring. Open end
of snap ring should be 1/2 inch from access hole.
Assemble Housing
Fig. 18 Pitman shaft seals & washers
1. With stamped end of needle bearing facing outward, drive bearing into bore from outside of housing until flush. Make sure bearings rotate freely.
2. Lubricate cavity between lips of pitman shaft (double lip) seal with power steering fluid.
3. Lubricate and install pitman shaft seals as shown. Make sure seal lips are properly positioned, retaining ring is seated.
4. If connectors were removed, install new ones by driving them into place.
Assemble Rotary Valve
1. Assemble one valve body Teflon ring back-up O-ring seal in each groove in valve body, being sure seals do not become twisted.
2. Assemble valve Teflon rings in ring grooves over O-ring seals by carefully slipping rings over valve body. The rings may appear loose or twisted
in the grooves but the heat of the oil during subsequent operation will cause them to straighten.
3. Install valve spool dampener O-ring seal in valve spool groove, being sure it is not twisted.
4. Insert stub shaft through valve spool, engaging spool locking pin.
5. Pull valve spool and stub shaft assembly into valve body, aligning stub shaft notch and valve body pin.
6. If used, slide spool spring over stub shaft and place into position.
7. Lubricate cap-to-worm O-ring and install in valve body. During assembly of the valve, if the stub shaft and cap is allowed to slip out of
engagement with the valve body pin, the spool will be permitted to enter the valve body too far. The dampener O-ring seal may expand into valve
body oil grooves, preventing removal of spool. If this happens, remove spool spring and disassemble rotary valve. Press on spool until O-ring seal
is cut and can be removed. Install new O-ring and reassemble.
