Fig. 18: Exploded View Of Power Rack & Pinion Steering Gear Assembly (Tacoma 4WD &
4Runner Shown; Land Cruiser & Tundra Are Similar - 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, press oil seal from bearing guide nut. Coat NEW oil seal with power steering fluid and press
into bearing guide nut.
5. Check needle bearing of rack housing for pitting or wear. If faulty, replace rack housing. If okay, coat
inside of bearing with molybdenum disulfide lithium-base grease.
6. Inspect condition of control valve bearing. If worn or damaged, replace control valve assembly. If okay,
coat inside of bearing with molybdenum disulfide lithium-base grease.
7. Check inside of cylinder end stopper bushing. If faulty, replace bushing. If okay, coat inside of bearing
with molybdenum disulfide lithium-base grease.
8. 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.
9. 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.
10. 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 lip with power steering fluid. Press
seal and spacer into rack housing from end opposite control valve housing portion. See
Fig. 18
. 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 rack housing oil seal lip with power steering fluid. Install seal into rack housing.
4. Coat NEW cylinder end stopper "O" ring with power steering fluid. Install cylinder end stopper and
tighten to specification. See
TORQUE SPECIFICATIONS
. Stake rack housing at end stopper.
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 a leak, 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
1999 Toyota RAV4
1999-2000 STEERING Power Rack & Pinion - Trucks
Microsoft
Sunday, November 22, 2009 10:35:47 AM
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© 2005 Mitchell Repair Information Company, LLC.
