Fig. 16: Exploded View Of Power Rack & Pinion Steering Gear Assembly (Tacoma 2WD - 2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Inspection
1. With rack mounted horizontally on "V" blocks, use dial indicator to measure rack runout. Runout should
not exceed .012" (.30 mm). Check rack and teeth for wear and damage. Replace rack if necessary.
2. If necessary, press oil seal and bearing from control valve housing. Coat NEW seal lip with power
steering fluid. Press seal into place. Ensure oil seal is facing same direction as removed.
3. Coat NEW bushing with molybdenum disulfide lithium-base grease. Using press, install bushing against
oil seal in rack housing.
4. If necessary, use brass bar and hammer to tap lower bearing out of rack housing. See
Fig. 15
. Turn
housing over and press upper bearing out of rack housing.
5. Coat NEW lower bearing with molybdenum disulfide lithium-base grease. Using press, install NEW
bearing into lower side of rack housing. Turn housing over, coat NEW upper bearing with molybdenum
disulfide lithium-base grease. Using press, install bearing into upper side of rack housing.
6. If necessary, use puller to remove oil seal from rack end bushing. See
Fig. 16
. Coat NEW oil seal lip
with power steering fluid. Press seal into bushing.
7. If necessary, use screwdriver to remove Teflon ring and "O" ring from steering rack. Coat NEW "O" ring
with power steering fluid. Install "O" ring. Carefully expand NEW Teflon ring by hand, only enough to
accommodate installation. Coat Teflon ring with power steering fluid. Press ring firmly into rack groove.
8. If necessary, use screwdriver to remove 4 Teflon rings from control valve assembly. Coat NEW rings
with power steering fluid. Slightly expand rings by hand and install in each groove. Use installer tool to
slide over rings and fully seat them.
9. If necessary, use screw extractor to remove union seats from side of control valve housing. Carefully tap
NEW seats into place.
Reassembly
1. With rack housing mounted vertically in soft-jaw vise, coat NEW seal with power steering fluid, and
press into rack housing from end opposite control valve housing portion. See
Fig. 16
. Ensure oil seal
faces in proper direction.
2. Mount rack housing horizontally in vise. Clean rack teeth of any burrs. Place protective sleeve end piece
on steering rack teeth end. Coat protective sleeve with power steering fluid. Install steering rack into rack
housing. Remove protective sleeve.
3. Coat NEW "O" ring with power steering fluid, and install on rack bushing. Tape steering rack end and
coat end with power steering fluid. Install rack bushing. Remove tape.
4. Align hole for wire of cylinder end stopper with slot of rack housing. Use installer tool and turn stopper
clockwise 400-500 degrees. See
Fig. 14
.
5. Install special connectors onto union fittings of rack housing and attach hand vacuum pump. Apply
15.75" Hg for about 30 seconds. Ensure there is no vacuum leak. If there is, check installation of oil seals
at each end of housing. See
Fig. 9
.
6. Coat Teflon rings of control valve assembly with power steering fluid. Wrap serrated end of control valve
shaft with tape. Push control valve assembly into housing. Press NEW oil seal into place after coating lip
1999 Toyota RAV4
1999-2000 STEERING Power Rack & Pinion - Trucks
Microsoft
Sunday, November 22, 2009 10:35:47 AM
Page 36
© 2005 Mitchell Repair Information Company, LLC.