VALVE SPRINGSSPRING TYPESMECHANICAL VIBRATION DAMPENERSVALVE SPRING INSPECTIONCHECKING INSTALLED HEIGHTPUSH RODSROCKER ARMSVALVE SPRINGSVALVE SPRINGSSPRING TYPESSPRING TYPESUniform PitchUniform PitchVariable PitchVariable PitchBasket CoilBasket Coil•Page 158 a, b, and cPage 158 a, b, and cMECHANICAL VIBRATION MECHANICAL VIBRATION DAMPENERSDAMPENERSFull LengthFull LengthHalf LengthHalf Length•Page 158 d and ePage 158 d and eVALVE SPRING INSPECTIONVALVE SPRING INSPECTIONSpring Squareness and Free LengthSpring Squareness and Free LengthSpring TensionSpring Tension•Closed PressureClosed Pressure•Open PressureOpen Pressure•Page 159Page 159CHECKING INSTALLED CHECKING INSTALLED HEIGHTHEIGHTMeasure between spring seat (Head) and retainerMeasure between spring seat (Head) and retainer•Page 162 Figure (a)Page 162 Figure (a)Subtract spec from measurementSubtract spec from measurementDifference is shim neededDifference is shim neededSerrated side is installed toward headSerrated side is installed toward headSilver .030 inchSilver .030 inchCopper .060 inchCopper .060 inch•Page 160Page 160PUSH RODSPUSH RODSSolid or HollowSolid or HollowSolid Push Rods lube Rocker Arms through a Solid Push Rods lube Rocker Arms through a passage in headpassage in headHollow Push Rods lube Rocker Arms through Hollow Push Rods lube Rocker Arms through internal passageinternal passageCheck for straightnessCheck for straightnessCheck for wear on endsCheck for wear on endsCheck for wear at Push Rod guide platesCheck for wear at Push Rod guide plates•Page 252 Class 261 LabPage 252 Class 261 LabROCKER ARMSROCKER ARMSShaft mounted Shaft mounted Stud mountedStud mountedCheck lock nut on stud mountedCheck lock nut on stud mountedCheck for wear at fulcrumCheck for wear at fulcrumPage 252 Class 262 LabPage 252 Class 262
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