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Lotus Service Notes
Section CK Hub carrier
Hub bearing unit Hub unit fixing bolt Retaining swage Double row ball bearing Wheel bolt thread
c50
Anti-roll bar drop links 38 Wheel bolts 105 Speed sensor to hub carrier 5 Brake disc retaining screw 10 CK.6 - FRONT WHEEL BEARINGS The hub bearing unit, which is common to all four wheels, is fixed to the hub carrier by 4 hex. head bolts, and incorporates a double row ball bearing with the inner race of the outboard bearing formed directly in the hub forging, and the inner race of the inboard bearing retained by a swaging operation on the hub flange. Inboard and outboard grease seals are included in the assembly, with a vehicle speed sensor ring integrated into the inboard seal, whose signal is picked up by a sensor mounted in the rear of the hub carrier. If there is found to be any discernible free play in the hub bearing, or any roughness or tight spots can be felt, or any untoward noise heard, or any signs of lubricant expulsion are evident, the hub assembly should be replaced - there is no provision for adjustment or replacement of individual bearings. To Replace Hub Bearing Assembly 1. With the wheel removed, release the two fixing bolts, and remove the brake calliper from the hub carrier. Support clear of the brake disc without straining the flexible hose. Release the single countersunk screw and withdraw the brake disc from the hub. 2. Release the four bolts securing the hub bearing unit to the hub carrier. 3. Fit the new hub bearing unit to the hub carrier, apply Permabond A130 (A912E7033) to the threads of the four bolts, and torque tighten to 70 Nm. 4. Refit the brake disc and calliper, using Permabond A130 (A912E7033) on the threads of the calliper fixing bolts and torque tighten to 86 Nm. Pump the brake pedal to re-position the pads before driving the car. |