SKF Timing Belt Kits - SKF.com

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Belt life vs. correct tension Belt tension 84 Chord ripping Correct tension Flank wear Ripping of teeth Tooth jump Life of belt Normal wear As this graph shows, the correct tension is critical to the life of the belt. Both excessive and insufficient tension can damage the belt and cause premature failure. General hints • Lock engine cams using correct tools to prevent slippage and movement. Do not use the teeth of the belt to block the engine when loosening or tightening the pulley bolts. • Do not use solvents to clean the pulleys. • Check that the auxiliary components controlled by the timing system (water pump, etc) are functioning correctly. If in doubt, recommend a change to the customer while making the repair. • Check for wear on the flanges. Rotate the driving shaft to the TDC of cylinder number 1; in the case of an engine with a double camshaft, assure that both are in the TDC position.
Analyzing belt wear and damage A broken belt is frequently the result of a problem with the system of pulleys and bearings. Therefore, it can be helpful to note the cause of belt breakage or wear and take steps to correct the problem. Important: Never install a used timing belt. Always install a new belt along with new idler pulleys and tensioners for optimum safety and performance. Problem: Torn or broken belt with ragged, jagged cord Probable cause: Excessive fitting tension Problem: Completely detached or worn teeth Probable cause: Either excessive or insufficient belt tension Problem: Back of belt is cracked Probable cause: Incorrect temperature, old belt Problem: Oil contamination on belt Probable cause: Contamination from oil or other petroleum derivatives Problem: Excessive noise Probable cause: Incorrect tension Problem: Belt exhibits tooth shear Probable cause: Insufficient belt tension Problem: Hollowed teeth Probable cause: Insufficient belt tension Problem: Land wear Probable cause: Excessive belt tension Problem: Visible wear on edge of belt Probable cause: Misaligned pulleys and/or tensioner 85
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Catalog 457702 2010 SKF Timing Belt
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Belt tensioner unit (TBT) The belt
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How to use this catalog This catalo
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Engine drive systems Technology and
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Engine drive systems Variations of
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Engine drive systems Cooling system
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Engine drive systems Metal idler, w
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Failure analysis overview 90% of en
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Failure analysis overview Tensioner
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Failure analysis overview Water pum
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SKF Timing kits Application install
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SKF Timing kits Application install
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Abbreviation list ABS ............
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Manufacturer to model index Manufac
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Passenger cars, light & medium truc
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Page 37 and 38: 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 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: Troubleshooting and failure analysi
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
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SKF Timing Belt Kits - SKF.com

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