SKF Timing Belt Kits - SKF.com

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Engine drive systems Auxiliary drive system The role of this particular drive system is growing in importance every day, as modern cars cover more demanding consumer requirements; comfort, electronic devices, fuel efficiency, etc. PAS (power assisted steering) and AC (air conditioning), once costly options are now standard on a wide range of cars. The aftermarket for multi-V belt idler and tensioner units has seen a steady rise as a result of this technology being implemented. The auxiliary drive system will continue to grow in importance for the modern car in the coming years. Multi-V belt The multi-V drive belt has become standard on new applications since the late 90’s. The design covers the need to drive multiple accessories from one belt around a compact area. The belt therefore needs to be flexible to offer tight wraps and return the belt on small radius pulleys, but also to be able to handle the higher tension needed to “grip” the functioning components without slippage. Reliability and endurance should similarly match the timing system on the engine. The multi-V belt operates in tough environments, sometimes low down on the car and often exposed to dirt, water and oil, and with more utilities added to the car, the strain on the belt increases. Other arrangements may see the system operate high up in a compact area where higher temperatures will affect the belt. Newer materials, such as EPDM, are common on the belts offering superior performance features. Even though the multi-V belt profile (pk) has become a recognized standard, there is no standard belt for the application. For every engine model there can be more than a handful of different auxiliary drive belt arrangements (different span lengths), depending on the type of equipment fitted. This span length is very important, down to the last millimeter for optimum operation. 8 A typical timing or multi-V belt will, in its lifetime, travel a distance equal to one lap around the world, where the teeth of the timing belt takes as many “bites” as there are people in the world. When the lap is completed, and sometimes sooner, as people today travel longer distances more quickly, the belt and bearing components need to be replaced.
Engine drive systems Metal idler, with double row bearings (VW). Polyamide idler, with single row bearing (Fiat). Accessory belt idler pulley (ABIP) Idler Idlers can be found in varied positions on the engine timing system, each with specific loading and performance conditions. Today’s engineers are trying to find ways to increase the life span of the idler to reach a target of 124,300 mi/>200 000 km (with the eventual aim of it having the same life span as the engine). They need to withstand the higher operating conditions through component design evolution. For example, a significant area of improvement is bearing sealing and greases. Finally more polyamide pulleys fitted results in overall weight gain for the designers. Engine seal Engine sealing arrangements have advanced dramatically over the last few years. Although hidden from view, modern sealing techniques, such as moulded-in-place permanent gasket solutions, have delivered significant improvements in achieving oil-tight assemblies for the effective life of an engine. Dynamic sealing, for crankshafts and camshafts, is now receiving similar design and material attention. Traditional elastomeric lip seals are today being replaced by PTFE (PolyTetraFluoroEthylene) thin film seals. They offer extended sealing life and a far greater level of protection from chemical attacks. This is a particular problem with diesel engines and some of the more exotic synthetic based oils. However, these provide the extended service intervals demanded in the market-place. slack span The idler pulley allows the belt to be correctly wound (providing optimum wrap angle) around the driven components, while also reducing the free belt length, which, if not accurately calculated into the design build, could cause excess vibrations and noise. 1. Sealing lip (varied material) 2. Metal or rubber casing 3. Contact spring Standard PTFE-seal with elastomeric or felt dust lip. 4th Generation PTFE-seal with improved durability and “easy-assembly”. Unitized PTFE-seal for heavy contamination. Idler Traditional engine shaft seal design 1. tight span engine rotation Modern engine shaft seal designs - PTFE: 2. 3. 9
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: Engine drive systems Cooling system
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 63 and 64:
Timing belt kit contents •TBK186W
Page 65 and 66:
Timing belt kit contents TBK214P DE
Page 67 and 68:
Timing belt kit contents •TBK230P
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Timing belt kit contents •TBK324P
Page 79 and 80:
Belt performance and quality Timing
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 97 and 98:
Passenger cars, light & medium truc
Page 99 and 100:
Passenger cars, light & medium truc
Page 101 and 102:
The Power of Knowledge Engineering
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