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Brakes Pulling[700/89] posted by TOM COOK on
Sunday, 27 December 1998, at 4:01 p.m.
Brakes seem to pull for an instant upon first application giving the steering wheel a small jerk when brakes first applied. Recent brake pad replacement and rotors turned seemed to help somewhat but did not cure problem. I am very skeptical of the mchanic's rep that did repair who said that this was typical of this year and model Volvo. Can anyone help me out on this one??
--Tom Cook
Re: Brakes Pulling[700/89] posted by Steve Ringlee on
Sunday, 27 December 1998, at 11:15 p.m.
Frequently this results from sticking guide pins. Your calipers have two guide pins each that allow the caliper body to float as hydraulic pressure is applied. If the pins are corroded or not lubricated properly, the pads will not move at the same rate and are likely to stick against the rotor. Re-lubing the pins is a mandatory part of any brake job and one frequently ignored by quick-to-finish mechanics. This is easy to fix: jack up one side, remove the wheel, and you will see two bolt heads on the inboard side of the caliper, each end surrounded by a rubber boot. Unbolt these one at a time, remove one and its sleeve, make sure it has no corrosion, re-lubricate with Permatex caliper lube or equivalent, and re-install. Torque on the Girling two-piston front caliper is 25 ft-lb. If the pin has inconsequential corrosion, clean and polish with crocus cloth; if anything more, replace the pin and sleeve.
--Steve Ringlee
Re: Brakes Pulling[700/89] posted by Steve Seekins on
Monday, 28 December 1998, at 10:50 a.m.
This is the classic symptom of bad radius rod to control arm bushings. There are 2 cone shaped bushings at the front end of each radius rod where they connect to the control arm. Easily replaced, be sure you get the newer more durable ones. Also, when replacing, be sure to clean out the holes in the control arm of ALL corroded metal and rubber residue from the old bushings. Also, do not do final tightening of the bushing bolts at either end of the radius rod until the car is on the ground and the suspension fully loaded and settled - otherwise you risk premature failure of the new bushings.
--Steve Seekins