Question 1

How to service and repair the front Wheel Hub on Toyota 4Runner?

Accepted Answer

The repair process for front axle hubs begins by removing the front wheel and separating the front speed sensor with a hexagon wrench then removing the 2 clamps and bolt before detaching the speed sensor wire harness from the steering knuckle. Obtain the front disc brake caliper assembly by first unattaching the bolt securing the brake tube bracket to the steering knuckle while using Special Service Tool: 09023-00101 to disconnect the brake tube from the caliper assembly before removing its 2 bolts. Start by removing the front disc then dissolve the front stabilizer link assembly when you detach the nut while keeping the stud steady with a hexagon (6 mm) wrench because the ball joint may rotate. The tie rod end sub-assembly separation process requires users to first remove the cotter pin and nut through the assistance of Special Service Tool: 09628-62011. Detach the steering knuckle via Special Service Tool: 09628-62011 to eliminate the front suspension upper arm assembly nut combined with the clip removal. Together with it, unfasten the two front suspension arm sub-assembly lower bolts. A front drive shaft hub separation with a plastic hammer is required for 4WD systems prior to removing the hub sub-assembly. The knuckle grease retainer cap inner is removed by using a screwdriver and hammer while Special Service Tool: 09930-00010 throughout the procedure with a hammer aids in unstaking the front wheel adjusting nut which is finally separated using Special Service Tool: 09318-12010. To proceed with front axle hub removal start by unscrewing the 4 bolts which secure the steering knuckle to the axle hub along with removing the axle hub itself from the knuckle. The O-ring attached to the axle hub must be removed after freeing the hub. The front axle hub soft requires placement in a vise after which Special Service Tool: 09710-30021 (09710-03051), 09950-40011 (09951-04020, 09952-04010, 09953-04020, 09954-04010, 09955-04061, 09957-04010, 09958-04011) will be required to remove the bearing and a screwdriver used to separate the front axle hub spacer. To assemble the front axle hub utilize Special Service Tool: 09649-17010 to press in a new bearing and then use a new front axle hub spacer with the assistance of a hammer and brass bar before taking care to avoid spacer damage. Secure the dust cover together with the axle hub to the steering knuckle with 4 bolts that need to be torqued at 80 Nm (816 kgf/cm, 59 ft. lbs.). Install the new O-ring with MP grease on the axle hub before installation. The process begins with mounting a new adjusting nut through Special Service Tool: 09318-12010 while using a torque of 275 Nm (2,804 kgf/cm, 203 ft. lbs.). Following that, install a new knuckle grease retainer cap inner with a brass bar and hammer to prevent damage from occurring. To install the components you should first attach both front axle hub assembly and front suspension upper arm assembly using a new nut that requires 110 Nm (1,122 kgf/cm) torque and securing with a new cotter pin. The front suspension arm sub-assembly lower receives two bolts which need a torque of 160 Nm (1,630 kgf/cm, 118 ft. lbs.) before installation of the tie rod end sub-assembly with nut and new cotter pin. A nut should be attached to connect the front stabilizer link assembly to the steering knuckle before torquing it to 70 Nm (714 kgf/cm, 52 ft. lbs.). A hexagon (6 mm) wrench should be used to hold the stud if the ball joint moves with the nut. Use Special Service Tool: 09023-00101 to connect the brake tube to the disc brake caliper assembly then torques both components to 15 Nm (155 kgf/cm, 11 ft. lbs.). Attachment of the steering knuckle speed sensor wire harness occurs by bolting it in place and torqueing to 13 Nm (133 kgf/cm, 10 in. lbs.). After that, install 2 clips and secure the speed sensor with a bolt tightened to 8.3 Nm (85 kgf/cm, 73 in. lbs.). The last steps include bleeding the brake line followed by checking the reservoir fluid level and brake fluid leakage prevention before installing the front wheel and torquing it to 112 Nm (1,142 kgf/cm, 83 ft. lbs.). Front wheel alignment checks and ABS speed sensor signal tests are also required.

Question 2

How to Service and Repair a Wheel Hub on Toyota Tacoma?

Accepted Answer

Services and repairs of wheel hubs should start with removing the front wheel. The ABS speed sensor involves disconnecting its wire harness clamp to the steering knuckle through two bolt removals. Disassembly of the brake caliper begins by unscrewing the two bolts while using proper support to keep it from damage. Detach the grease cap by using a screwdriver then verify the bearing shaft alignment with a dial indicator to check if it exceeds 0.05 mm (0.0020 inch); follow this result with new axle hub bearing replacement. You should eliminate the axle hub with disk by discarding the cotter pin and lock cap and then utilizing a 30 mm socket wrench to remove the nut followed by the claw washer together with the outer bearing and axle hub with disk off the steering knuckle. Maintain proper care when handling the outer bearing to prevent its drop. You should use a screwdriver to pry the oil seal gently while watching out for the ABS speed sensor rotor. Remove the inner bearing from the axle hub afterward. To begin, remove the dust cover by disconnecting its four bolts before removing the stabilizer bar link by holding the bolt with a wrench and unscrewing the nut and five retainers and collar and four cushions and bolt. A jack should support the lower suspension arm followed by loose operations on the 2 lower ball joint set bolts and cotter pin removal and nut looseness. Special Service Tool: 09628-62011 will help disengage the steering knuckle from the upper ball joint while you remove its 2 lower ball joint set bolts and the steering knuckle together with the nut. Keep the jack in position. You should install the lower suspension arm using a jack while placing the steering knuckle onto the lower ball joint and then install the bolts temporarily. To secure the upper ball joint against the steering knuckle position your arm downward before attaching the nut through proper torques to 110 Nm (1,100 kgf-cm, 80 ft. lbs.). After adding a new cotter pin loosely fasten the nut to an angle of 60o when the cotter pin holes do not match. Torque the 2 lower ball joint bolts to 160 Nm (1,600 kgf-cm, 116 ft. lbs.). Prepare the dust cover by inserting 4 bolts then torque them to 8.3 Nm (85 kgf-cm, 74 inch lbs.) and finish by installing the stabilizer bar link with its bolt and 5 retainers, collar, 4 cushions, along with a new nut. Use MP grease by placing it in your palm to pack the bearings until you see the grease coming out from the opposite side while giving attention to coat all inside surfaces of the hub and cap. Through the use of Special Service Tools 09527-17011, 09950-60020 (09951-00710), 09950-70010 (09951-07150) with a hammer, install a new oil seal into the axle hub while protecting the ABS speed sensor rotor and applying MP grease on the seal lip. Set the axle hub against the spindle and add both a new outer bearing and claw washer to it. Adjust preload by applying torque of 34 Nm (350 kgf-cm, 25 ft. lbs.) to the nut followed by rotating the hub several times before loosening the nut just enough for movement and measuring the frictional force of the oil seal with a spring tension gauge until preload matches the specified value range of frictional force from 6 to 18 N (0.6 - 1.8 kgf, 1.3 - 4.0 lbs.). A dial indicator should be used to check bearing shaft backlash which must be 0.05 mm (0.0020 inch) or less. Then install the lock cap and new cotter pin by tightening the nut to 60 degrees levels only if the cotter pin holes are misaligned. The final step should be grease cap installation. Secure the brake caliper by threading the 2 bolts to a torque of 108 Nm (1,100 kgf-cm, 80 ft. lbs.) and connect the ABS speed sensor along with wire harness clamp to vehicles with ABS by using the 2 bolts torqued to 8.0 Nm (82 kgf-cm, 71 inch lbs.). To complete the process install the front wheel by torquing it to 110 Nm (1,150 kgf-cm, 83 ft. lbs.). Next depress the brake pedal several times then inspect the front wheel alignment for all vehicles and check the ABS speed sensor signal when ABS is equipped.

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