SKF Timing Belt Kits - SKF.com

More documents

Recommendations

Info

Frequently asked questions Q: Tensioners and idler pulleys sometimes look the same. Can I interchange? A: You should only fit part numbers specifically shown for that application. Automotive engines each have their own particular performance characteristics, which means that tensioner and pulleys are designed and tested specifically for each new motor. The exterior appearance of the bearing unit may hide internal changes that have taken place to meet the change in engine specification, i.e., grease performance, bearing clearance, tolerances, tensioner spring strength. Q: Can I refit an old timing belt? A: NO. Used belts should not be refitted and used. The original belt has already been in use at its optimized tension, so the properties of the belt have changed compared with a new belt. Q: The tensioner is showing external corrosion but is rotating freely. Is it okay? A: Change it. If the belt is being changed, then it is possible this unit will need to be functioning on the car for another 60,000 mi/96 560 km. Don’t take the risk: internal condition and bearing life cannot be seen. Q: How often should a complete timing belt and tensioner change be carried out? A: Most car manufacturers including NISSAN, FORD, HONDA, and CHEVROLET specify complete repairs to their models during a specified service period. Outside this period the system should be checked for damage. Or if you are in doubt about the condition of components, you should recommend a complete change to your customer. 74 Q: There are many brands of timing belt kits available. Why should I use SKF? A: SKF was the first company to launch this concept, and since then has continued to use its OE manufacturing experience to lead the market with OE approved components in SKF branded boxes. Q: What’s the main benefit to our repair shop for using timing belt kits? A: You will be more efficient, having the necessary components in one box. You will also have the ability to promote a professional image to your customers in terms of quality of work and service. The end result is higher customer satisfaction and a stronger business. Specific removal and installation instructions by make, model and year included in each kit. Q: Can I buy the tensioner or pulleys on their own? A: Sometimes you will only be required by the customer to change the pulley or tensioner, so for flexibility we offer an extensive range for our customers. Q: What is the difference between a timing belt kit and a multi-V belt kit? A: The timing belt kit is used on timing system in which the crankshaft drives the camshaft(s) and actuates the valves via a timing belt. The multi-V belt kit is used on auxiliary drives in which the crankshaft drives auxiliary components such as the alternator, air conditioning compressor, power steering pump etc., via a multi-V belt. Q: What is a belt tensioner unit? A: The belt tensioner unit sets the right belt tension and provides guidance for the belt. Q: What is the difference between a BTU and an Automatic BTU? A: The adjustment of tension during mounting is achieved by means of an eccentric or by means of a spring acting against a contact pad on the bracket. Q: What is an idler pulley? A: The idler pulley is fixed and allows the belt to be correctly wound around the driven components. Q: How can I check the belt tensioner? A: A belt tension testing device that ensures proper tension of the belt after mounting should be used. Q: What are the main causes of belt damage? A: Too high or too low tension, vibrations, high temperature and belt misalignment. Q: Why is it recommended to also change belt tensioner and pulleys when the belt is repaired? A: The main source of the belt’s damage has most definitely affected the other rotating components of the timing and auxiliary systems, like the BTU, Automatic BTU and idler pulley. To allow a complete and safe repair for the engine, SKF recommends changing the belt and the belt tensioner pulleys at the same time.
Belt performance and quality Timing belts offer numerous advantages over chain and gear drives: greater efficiency, reduced weight, quieter operation and fuel savings. Constant synchronous power is assured with precision molded teeth that perfectly mesh with pulley grooves pitch, width and length. Fast facts • Increased engine demands required tougher, more durable timing belts and pulleys with high quality bearings and seals • Belts made of high quality materials cost more—but the added performance makes them the best value • Belts may look alike, but they are not interchangeable. Correct tooth profiles are critical. • Timing belt failure can result in not just inconvenience, but costly engine damage. • The cost of the belt is only 5%-10% of changing the belt. Your customers will agree that it’s a small price to pay for peace of mind. Belt construction Special belt materials provide durability performance and reliability in the high-temperature engine compartments of today’s vehicles. High tensile strength fiberglass or aramid cords resist stretching and shrinking. The belt facing consists of wear resistant fabric which protects the tooth surface and keeps frictional loss at a minimum. New belt designs Generic timing belts, made of standard materials with standard tooth profiles, are a thing of the past. New generation belts are vastly improved, providing the increased durability and smoother performance characteristics demanded by today’s engines—and your customers. Application-specific tooth profiles The earliest timing belts had a trapezoidal tooth design. But the need to meet more demanding applications resulted in the development of belts with curvilinear and modified curvilinear profiles. These different tooth profiles are not interchangeable. It is critically important to select the correct belt for each specific application. (See illustrations below for tooth profiles.) Trapezoidal Curvilinear (Round) Modified curvilinear (Round) 75
Page 1 and 2:
Catalog 457702 2010 SKF Timing Belt
Page 3 and 4:
Belt tensioner unit (TBT) The belt
Page 5 and 6:
How to use this catalog This catalo
Page 7 and 8:
Engine drive systems Technology and
Page 9 and 10:
Engine drive systems Variations of
Page 11 and 12:
Engine drive systems Cooling system
Page 13 and 14:
Engine drive systems Metal idler, w
Page 15 and 16:
Failure analysis overview 90% of en
Page 17 and 18:
Failure analysis overview Tensioner
Page 19 and 20:
Failure analysis overview Water pum
Page 21 and 22:
SKF Timing kits Application install
Page 23 and 24:
SKF Timing kits Application install
Page 25 and 26:
Abbreviation list ABS ............
Page 27 and 28: Manufacturer to model index Manufac
Page 29 and 30: Passenger cars, light & medium truc
Page 55 and 56: Timing belt kit contents TBK014P DE
Page 57 and 58: Timing belt kit contents •TBK101P
Page 59 and 60: Timing belt kit contents •TBK145W
Page 61 and 62: Timing belt kit contents •TBK165A
Page 65 and 66: Timing belt kit contents TBK214P DE
Page 67 and 68: Timing belt kit contents •TBK230P
Page 77: Timing belt kit contents •TBK324P
Page 81 and 82: Belt specifications SKF No. Width L
Page 83 and 84: Belt specifications SKF No. Width L
Page 85 and 86: Timing belt removal and installatio
Page 87 and 88: Troubleshooting and failure analysi
Page 89 and 90: Analyzing belt wear and damage A br
Page 91 and 92: Troubleshooting and failure analysi
Page 93 and 94: Good practices and helpful hints Ex
Page 95 and 96: Setting up automatic tensioners: a
Page 101 and 102: The Power of Knowledge Engineering
show all

SKF Timing Belt Kits - SKF.com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?