Power Steering Gear: Replacement

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

IF NECESSARY, REPLACE OIL SEAL AND BEARING
1. Using SST, press out the oil seal and bearing from the control valve housing.
  1. SST 09950-60010 (09951-00260), 09950-70010 (09951-07150)
  Fig 1: Pressing Out Oil Seal And Bearing From Control Valve Housing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Coat a new oil seal lip with power steering fluid.
3. Using SST, press in the oil seal.
  1. SST 09950-60010 (09951-00180, 09951-00330, 09952-06010), 09950-70010 (09951-07150)
  NOTE: Make sure to install the oil seal facing in the correct direction.
  
  Fig 2: Pressing In Oil Seal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Coat a new bearing with molybdenum disulfide lithium base grease.
5. Using SST, press in the bearing.
  1. SST 09950-60010 (09951-00330), 09950-70010 (09951-07150)
  Fig 3: Pressing In Bearing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IF NECESSARY, REPLACE OIL SEAL
1. Using SST, press out the oil seal from the bearing guide nut.
  1. SST 09950-60010 (09951-00320), 09950-70010 (09951-07100)
  Fig 4: Pressing Out Oil Seal From Bearing Guide Nut
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Coat a new oil seal lip with power steering fluid.
3. Using SST, press in the oil seal.
  1. SST 09950-60010 (09951-00280, 09951-00360, 09952-06010), 09950-70010 (09951-07100)
NOTE: Make sure to install the oil seal facing in the correct direction.

Fig 5: Pressing In Oil Seal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT BUSHING
1. Check the inside of the bushing of the cylinder end stopper for cracks. If faulty, replace the bushing.
2. Apply molybdenum disulfide lithium base grease to the inside of the bushing.
  
  Fig 6: Inspecting Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IF NECESSARY, REPLACE BUSHING
1. Using a screwdriver, remove the bushing from the cylinder end stopper.
  NOTE: Be careful not to damage the cylinder end stopper.
2. Coat the inside of a new bushing with molybdenum disulfide lithium base grease.
3. Install the bushing.
  
  Fig 7: Removing Bushing From Cylinder End Stopper
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IF NECESSARY, REPLACE TEFLON RING AND O-RING
1. Using a screwdriver, remove the teflon ring and O-ring from the steering rack.
  NOTE: Be careful not to damage the groove for the ring.
2. Coat a new O-ring with power steering fluid and install it.
  
  Fig 8: Removing Teflon Ring And O-Ring From Steering Rack
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Expand a new teflon ring with your fingers.
  NOTE: Be careful not to overexpand the ring.
  
  Fig 9: Expanding A Teflon Ring With Your Fingers
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Coat the ring with power steering fluid.
5. Install the ring to the rack, and settle it down with your fingers.
  
  Fig 10: Installing Ring To Rack
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IF NECESSARY, REPLACE TEFLON RINGS
1. Using a screwdriver, remove the 4 teflon rings from the control valve assembly.
  
  Fig 11: Removing 4 Teflon Rings From Control Valve Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Be careful not to damage the grooves for the ring.
2. Expand 4 new rings with your fingers.
  NOTE: Be careful not to overexpand the ring.
3. Coat the rings with power steering fluid.
  
  Fig 12: Installing Rings To Control Valve Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Install the rings to the control valve assembly, and settle them down with your fingers.
5. Carefully slide the tapered end of SST over the rings until the ring fits to the steering rack.
  1. SST 09631-20081
NOTE: Be careful not to damage the rings.

Fig 13: Removing Union Seat From Control Valve Housing
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IF NECESSARY, REPLACE UNION SEAT
1. Using a screw extractor, remove the union seat from the control valve housing.
  
  Fig 14: Taping In A Union Seat
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using plastic hammer and sliding handle, lightly tap in a new union seat.
NOTE: Before installing the union seat, remove dust sticking to the control valve housing.