Question about Lexus LX 450

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Wanting to replace front rotors, it appears that the hub assembly needs to come off first. everything else is off. does this require a "puller" of some sort? i would imagine if i wanted to replace the front wheel bearings, i would have to pull this hub for this procedure. can anyone give me some pointers thanks kat 4-5-11 katjohn1@airmail.net

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  • katjohn1 Apr 08, 2011

    the lexus is a 97 450 suv, the hub is approx 4 inches across, there are 6 stud/bolts , i have removed the nuts, but it appears to need some type of puller to remove the face of the hub. my guess that behind the hub are the spindle and wheel bearings. these can easily be removed, then the rotor will slide on off. my problem is getting the hub off. does this require a special tool or puller, or is there some old fashion way to pull off? i tried to attach a pict of this, however i does not appear to allow me. can i get a seperate e-mail address so i can attach? or maybe the description i am writing may now help



    thanks



    kat

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What year and model lexus?Most have two screws holding rotor to hub and you can remove the screws and bump rotor off.

Posted on Apr 07, 2011

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How easy is it to replace a front wheel bearing assembly? and also a diagram if possible.


It's not too involved. Here's a link with some more information to change it:
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Are you talking about the front rotors? The hub and rotor are one assembly and do not seperate on that truck. If you need to replace one part, the replacement part will have the hub and rotor together.

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The front wheel bearing is a multi-piece hub type of bearing, and the hub assembly does have to be pressed back together if you want it re-assembled correctly, and I have seen people try and use a drift and hammer to replace that bearing and all that they managed to accomplish was to cause even more damage and had to also replace the hub flange. You can save a lot of money by removing the entire steering knuckle/hub assembly from the vehicle, and take it and a new bearing to a machine shop, and they will usually not charge very much to press that bearing for you, then all you have to do is simply replace the steering knuckle/hub assembly.



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I need to remove the front brake rotors from my 94 Isuzu trooper to either turn or replace them. Is this a complex project requiring special tools to remove or re-install due to the auto 4wd hubs? I have...


No, but I would replace the rotors. Turning them usually winds up getting them warped as soon as they heat up and/or you hit a puddle of water..also, you will need a torque wrench and standard automotive tools, Jack and stands and a vice..

1 Place the Transfer shift in the 2H position.
Raise and support the front of the vehicle safely on jackstands.
2 Remove the wheel and tire assembly.
3 Loosen the hub to rotor retainer bolts.
4 Remove the brake caliper mounting bolts and carefully remove the caliper (along with the brake pads) from the rotor. Do not disconnect the brake line. 5 Secure the caliper out of the way with the flexible line still connected.

Once the hub/rotor is removed from the vehicle the wheel bearings may be cleaned and repacked or the bearings and races may be replaced. For more information, please refer to the wheel bearing procedures in General Information & Maintenance of this manual.

6 Remove the hub nut using hub wrench J-29020-A or equivalent.
7 Remove the hub cap assembly retainer bolts.
8 Remove the spindle nut, washers, and other components. Remove the hub/rotor, being careful not to drop the outer wheel bearings. As the hub/rotor is pulled forward, the outer wheel bearings will often fall forward.
9 Once the hub/rotor is removed, remove the retainer bolts securing the rotor and hub together. Inspect the hub and replace if needed.

To install:
1 With the rotor secured in a vise, attach the wheel hub to the rotor using the retainer bolts. Tighten the bolts to 47-58 ft. lbs. (61-75 Nm). Apply 2.12 oz. (60 gm) of grease to the hub before installing.
2 Carefully install the wheel hub/rotor over the spindle.
3 Install the bearings washers and other components. 4 Position the lock washer so the hub cap assembly bolt holes line up properly.
5 Install the spindle washer and nut and secure using hub wrench J-29020-A or equivalent. Preload the bearing to 3.31 lbs. (1.5 kg).
6 Install the inner cam and any shims. Install the hub cap assembly and secure in place with retainer bolts. 7 Tighten grade M8 bolts to 17-22 ft. lbs. (22-29 Nm), tighten grade M10 bolts to 40-47 ft. lbs. (52-61 Nm).
8 Install the brake caliper.
9 Install the tire and wheel assembly.
10 Remove the supports and carefully lower the vehicle.

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Removal & Installation
  1. Remove 2/3of the brake fluid from the master cylinder.
  2. Raise and support the vehicle.
  3. Remove the tire and wheel assembly.
  4. Remove the front wheel hub extension (dual wheel vehicles only).
    • Insert a drift or large screwdriver through the brake caliper into one of the brake rotor vanes in order to prevent the rotor from turning.
    • Mark the relationship of the front wheel hub extension to the hub
    • Remove the front wheel hub extension bolts
    • Remove the front wheel hub extension from the vehicle. It may be necessary to tap around the perimeter of the hub extension with a rubber mallet to loosen it from the hub
  5. Mark the relationship of the rotor to the hub.
  6. Remove the caliper and mounting bracket as an assembly.
  7. Hang the caliper and the mounting bracket assembly from the suspension using mechanics wire.
  8. Remove the rotor.
  9. If the rotor is difficult to remove due to corrosion in the hub area use the following procedure to remove the rotor (25 series only).
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    • Generously apply penetrating oil or the equivalent to the hub/rotor area
    • Insert (2) M10 x 1.5 bolts (jack screws) into the threaded holes of the rotor
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To install:
  1. Clean all rust and contaminants from the both side of the rotor and the hub flange.
    NOTE If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.

  2. Install the rotor.
  3. Install the caliper and the mounting bracket as an assembly.
  4. Install the tire and wheel assembly.
  5. Remove the safety stands.
  6. Lower the vehicle.

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1 Answer

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I had to remove the R/F hub assembly to replace the U-Joints -It requires a lot of force on the hub assembly generally requiring replacement of the hub assembly if it does not want to cooperate. So be prepared to replace it if necessary.

I had to purchase a large hub puller from Snap-on tools-it bolts up to the hub and the shaft is driven in at the axle shaft it was effective after a lot of pounding and heating. Which resulted (as I stated above )
with replacement of the hub assembly.


Thanks MJ

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