The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

9000 Bulletin Board
1985-1998 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Maybe this technical service bulletin could help...
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Street (more from Street) on Mon, 3 May 2004 04:47:42 Share Post by Email
In Reply to: Anyone Ever Heard of Need to Balance Brake Rotors?, Peter Ingram, Sun, 2 May 2004 20:25:39
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Rims/Tires - Vibration Diagnosis
CATEGORY
Suspension

SECTION
7

PAGE
8

ISSUE
05/94-0460

CODE
700

Subject:
Addressing Vibration Complaint Caused By Rims or Tires

Application:
All Models

Vibration complaints must be carefully diagnosed and corrected so that the customer does not have to return for a second or third attempt. This bulletin contains information on rims and tires to assist you in identifying the root cause of a complaint and making an adjustment or repair. Also see PSI 04/94-0457 for information regarding steering wheel oscillation.

Interview the customer

Explore the answers in order to make the proper adjustments. recommendations or repairs. Take notes! Some sample questions are listed below:

^ At what outside temperature range does the symptom occur?
^ At what road speed does it occur?
^ When was the symptom first noticed?
^ Can the symptom be duplicated?
^ Is the symptom intermittent?
^ Does it occur after the car has been parked several hours and then disappear after a few miles?
^ Have there been any previous attempts at a repair?


Preliminary Checks

1. Test drive the car and verify the customer complaint. Flat spots from sitting should disappear after a few miles.
2. Check that the correct type of tire and rim are fitted to the car.
3. Inspect the tires and rims for visible damage.
4. Make sure that tire pressures are correct and the same as those shown in the owner's manual.
5. Inspect the tires for unusual wear patterns.
6. Check that there are no flat areas on the tire tread.
7. Check the rims for dents or flat spots.
8. Check for missing wheel weights.


Balancing Tires

1. Remove and dynamically balance all four tires.

NOTE Modern balance machines have settings for "high accuracy". Be sure and use this feature when fine-tuning the balance. If you do not, the machine may round off a weight of less than 1/4 oz. to zero.

2. During the balance process, observe the rotation of the tire and rim. There should not be any flat spots in the tire or rim nor should there be any lateral runout. If a tire has flat spots or lateral run-out, replace it. If a rim has damage or lateral run-out, replace it.








NOTE ^ If the car is equipped with full wheel covers and vibration still exists, remove the wheel covers and test drive again. If the vibration goes away, replace the suspect wheel covers.
^ If excessive weight is required, it may be necessary to dismount the tire, rotate it 180°on the rim and rebalance.
^ Certain balance machines have "match mounting" capability which matches a rim and tire before balancing takes place. See Figure 2.
^ Always use tire lubricant when mounting a rim or tire. Do not use petroleum-based products. See Figure 3.

3. Road test the car. Try to best duplicate the conditions when the complaint occurs.

NOTE If additional remedies are necessary, there may be damage or runout at the rim.

Checking Rims for Runout or Damage

1. Dismount the tire and install the rim on the balance machine. Spin the rim by hand and observe the areas where the tire and rim meet.






2. If no runout or damage is visually detected. mount the rim (without the tire) in a stationary wheel balancing machine. Set up a dial indicator gauge with a pointer and measure both the radial (out-of-round) and axial (warp) tolerances on both sides of the rim. See Figure 4.


Maximum permitted tolerance:

Rim type: [A] radial (mm)[B] axial (mm)
Steel rim 0.6 0.8
Alloy 0.5 0.5

3. Replace any rim that has excessive tolerances.

NOTE Even new rims should be inspected prior to mounting a tire to make certain there is no transport damage.

Warranty Information:

Based on a customer complaint. a claim may be submitted only when a manufacturing defect is clearly demonstrable.

Based on a specific condition, however. you may contact your District Service & Parts Manager for authorization.



posted by 62.194.7...
Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!