- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
There are a couple of things that can cause vibration ie wheel balancing that might be wrong usually vibrates when driving at 100-120 km/hr,ball joints that a worn,wheel hubs bend,steering knuckle excessive play,steering rack excessive play,worn steering UJ,worn steering column....
do not grease bushes . Excessive play in the steering is an indication that the end float or clearance in the box/rack needs adjusting. The noise I suspect to be a bearing failing and that would account for the play. Stabiliser bars have nothing to do with steering. They are there to stop body roll going round a corner.
Lay under the front end and have someone turn the wheel back and forth. Inspect all the steering linkage components for play in the joints. any play is too much and the fitting should be replaced. It may also be the ball joints. They are located on the steering knuckle at each front wheel.Inspect for play in the same manner
The most common of all problems in a steering system is excessive steering wheel play. Steering wheel play is normally caused by worn ball sockets, worn idler arm, or too much clearance in the steering gearbox. Typically, you shou Id not be able to turn the steering wheel more than 1 1/ 2 inches without causing the front wheels to move. If the steering wheel rotates excessively, a serious steering problem exists.
An effective way to check for play in the steering linkage or rack-and-pinion mechanism is by the dry-park test. With the full weight of the vehicle on the front wheels, have someone move the steering wheel from side to side while you examine the steering system for looseness. Start your inspection at the steering column shaft and work your way to the tie-rod ends. Ensure that the movement of one component causes an equal amount of movement of the adjoining component.
Watch for ball studs that wiggle in their sockets. With a rack-and-pinion steering system, squeeze the rubber boots and feel the inner tie rod to detect wear. If the tie rod moves sideways in relation to the rack, the socket is worn and should be replaced.
Another way of inspecting the steering system involves moving the steering components and front wheel BY HAND. With the steering wheel locked, raise the vehicle and place it on jack stands. Then force the front wheels right and left while checking for component looseness.
If you make a hard right or left hand turn (with steering wheel turned until it stops) you'll hear and feel a pop sensation.When you drive over potholes you'll feel a slight pull to one side.If it is one of the upper balljoints,you can grab the tire with both hands near the top(11 and 1 o'clock) and pull the wheel back and forth.You will feel looseness if the upper balljoint is bad.
There should be a bolt sticking out of the steering box with 1 or 2 nuts on the bolt. This is a thrust setting which puts load on the steering gear. Most people jack the front wheels off the ground and then back off the nut or nuts. You then turn the bolt to screw further into the steering box until you have 1/2 inch or less of play in the steering wheel. Then tighten the nut or nuts down and recheck to see if setting held.
There are a few things that could be wrong.
1) One of the suspension joints are worn and causing the excessive play, ie....tie-rods, idler arm and so on.
2) Steering gear is worn and in need of adjustment.
All in all, they should take a look at it and determine if anything is out of spec.
I know school buses are required to pass state inspections, has your bus been checked lately?
Wheel Hub Assemblies: Systems and Diagnosis of Worn Hub Assemblies & Bearings
Front wheel hub assemblies and bearings control the position of, and reduce the resistance of, vehicle wheels in contact with the pavement. When they fail, front wheels may not be kept in position and vibration and noise usually develop. Symptoms that normally develop as a result of these worn parts include:
A humming, rumbling or growling noise which increases with acceleration or as the vehicles turns
Vibration felt in the steering wheel, which changes with vehicle speed or as the vehicle turns
Looseness or excessive play in the steering wheel (especially while driving over rough road surfaces)
A loud, constant grinding noise when driving the vehicle (heard in the most severe cases of a wheel bearing failure)
Pulling to one side when braking.
Roughness - with the vehicle of the ground, roughness or vibration when rotating the wheel
Looseness - with the vehicle off the ground, looseness when wiggling the wheel back and forth (Looseness may also indicate a worn ball joint)
Excessive brake pedal play can also indicate sloppy or excessively loose wheel bearings
ABS failure in the system may be related to failure of the ABS sensor in the hub assembly or the internal sensor in the wheel bearing