EXPLANATION OF MOST COMMONLY FOUND PROBLEMS IN BRAKE DRUMS:
Brake systems should be checked at systematic and programmed intervals
These checks will result in
Diminished fuel consumption
Decreased risk of breakdowns on the road
Decreased repair costs

Cracked Brake Drums :
Problem: Extensive heating and cooling may cause cracks on blocks of lining surface.
Reason: Recurrence of cracking problems may be the result of insufficient brake and brake drum systems or maladjustments for certain applications. If no error is detected during the inpection control process of the break system and brake drums, the problem may be due to driver fault or negligence.
Explanation: When the brake system is controlled, wear of brake drums must be compared with producer firm's values. The diameter of a brake drum must be suitable to the radius of brake lining. If these are not a proper fit, uneven tearring in the brake lining will occur resulting in a shortened life span. At the same time the brake lining will overheat causing cracks on brake drums.

Thin Heat Cracks :
Problem: Thin, hairline cracks appear on the brake drum's working surface.
Reason: This problem occurs when brakedrums are continually heating and cooling.
Explanation: These thin cracks don't affect the performance of braking but must be constanly kept under control. If cracks begin to deepen, the brake drum must be changed.

Oval Brake Drums :
Problem: Uneven wear on the drums surface
Reason: A deviation from the radius occurs at different points of the working surface of drums causing more wear on one drum surface than on the other.
Explanation: This kind of brake drum must be turned straightly on a lathe to correct to the point not exceeding maximum drum diameter. If this diameter exceeds the maximum diameter, then the drum must be changed.

Oiled Brake Drums :
Problem: Colorless spots are detected or the brake drum surface or brake system.
Reason: There is a leakage of grease or oil in the brake system. Wrong oiling of accentric or wrong lubricating of a brake system may cause unwanted oiling.
Explanation: The leakage point must be found, repaired, and the brake system completely cleaned. If after this proccess the brake drum is still oily, then the brake drums must be changed.

Deep Lined Brake Drums :
Problem: Deep lines appear on the braking surface of brake drums and extensive wear.
Reason: Extensive wear.
Explanation: If these lines are little, repairs can be made by turning the lined area on the lathe. Also, if the lines little and if the diameter of brake lining is in tolerance, then only the lining may need to be changed. In order to decide, the quantity of wearing material in brake system must be controlled. If necessary both lining and drum must be changed.

Shining Brake Drum :
Problem: Braking surface on the drums are shining like a mirror.
Explanation: In this case it must be repaired with 80-100 degree sand every. If this problem continues, then wear of the drum must be controlled. If the brake drum surface is like a glass, it must be asked to producer of the vehicle for alternative brake drums.

Spotted Brake Drums Because of Heat :
Problem: Blistered darkened dots appear on the brake surface.
Reason: These are result of unwanted, irregular wear. When pressed to a pedal for braking, it senses as pedal was moving under the foot and voice may come during braking.
Explanation: To recover this case, we have to turn on lathe to clean such surfaces or stoning may be sufficient. If we can't manage in this way then the brake durm must change. For adjusting maximum braking effect, irregular wearing, case of brake drums must be controlled and if necessary must be changed.

Suggstions to Extend the Usage Life of Brake Drums and Linings :
When mounting drum or disc on hub, if excessive force is applied, there may be deformation on counter parts. The reason for this must be found and corrected.
The bearing of the wheel must be mounted correctly in order to avoid the excessive power force on the brake drums and discs during the braking.
In certain intervals the brake drums and lining must be checked. Unadjustment of distance betwen brake drums and discs may cause on over heating of brake drums and dicsc and result in higher fuel consumption. This must be fixed.
When brake drums heated the parking brakes must not be used. It is recommended to wait for cooling otherwise the brake drums may be cracked.

When the Brake drum must be Changed :
The safe usage of brake drums depends on different factors. The conditions that determine the life of brake drums are listed below:
Brake drums msut be changed when the following provisions/conditions occur:
1- Maximum degree of diameter is reached
2- Utmost heating occurs
3- Cracked
4- Strong dots appear inside
5- Bolt holes wear or broaden
6- Deep lines appear on the surface of linig
7- Extensive heat caısed when braking
8- Curved and distored
9- To meet the smiked Braking balance and effect brake drums must be changed as a couple

Guarantee :
1- Safak will guarantee only if a workmanship defect had become during production.
2- Safak will not be responsible from wrong mounting or usage being done by a third party
3- Safak is not giving a guarantee to the productions which is not named in its latest catalog.
4- If defect from the production is being accepted, Safak will be responsible only at the amount of the prt being purchased.
5- Safak is not responsible from the acident or loss of the part being sold caused on workman ship cost.

Service Report :
*Safak Dokum is rendering a service to the automotive ,ndustry by producing brake drums and discs at an international level.
*Safak is producing brake drums and discs at the highest quality on CNC equipment.
*Safak is a supplier of brake drums and discs of every kind of vehicle through her vendors or directly to the world market.
*Safak as a friend of consumer, caring utmost sensitiveness on production and design against possible injury of a mounting personnel.
*Safak is continuously expensing its all power, in order to meet the customers needs and satisfaction, to keep the highest service extent busines world.