2006 - Gran Fondo 3 Coil

© Marzocchi Suspension2006 - Gran Fondo 3 CoilDiagnosticsFinding the problem Finding the possible cause Possible solutions proposedFork doesn't get full travel Oil level too high Check oil levelsFork doesn't get full travel Spring rate too stiff Change to softer spring rateFork extends too quickly; harsh top-out afterimpactsFork extends too quickly; harsh top-out afterimpactsRebound damping is not enoughRebound damping is not enoughIncrease rebound dampingFork has too much sag Oil is too fluid Check oil levelsReplace the oil (SAE 7.5) with one of higherviscosity indexFork has too much sag Spring rate too soft Change to stiffer spring rateFork has too much sag Spring rate too soft Increase spring preloadFork has too much sagFork is “sticky”; fork does not perform as newFork is too soft, but the sag is the onerecommendedFork is too soft, needs more than the maximumpreloadFork is too soft, needs more than the maximumpreloadFork stays down or "packs up" during multipleimpactsFront wheel tends to tuck under while turning leftor rightFront wheel tends to tuck under while turning leftor rightHeavy amount of oil on stanchions; oil drippingdown legsHeavy amount of oil on stanchions; oil drippingdown legsKnocking sound during rebound, but no harsh topoutSpring rate too softDirty sealing rings; fork needs to beservicedCompression damping is not enoughOil is too fluidSpring rate too softRebound damping is too highRebound damping is too highSpring rate too softSealing rings damagedThe stanchion tubes could be damagedRebound damping is too highIncrease spring preload by replacing the preloadtubeRenew all sealsIncrease compression damping by changing oilvolumesCheck oil levelsChange to stiffer spring rateDecrease rebound damping with the relevantregisterDecrease rebound damping with the relevantregisterChange to stiffer spring rateRenew all sealsLoss of sensitivity Old oil Change the oilHave the stanchions be checkedDecrease rebound damping with the relevantregisterLoss of sensitivity Sliding bushes worn Renew the sliding bushesOil leaking from the bottom of the fork leg Bottom nut/screw loose Tighten the nut or screwOil ring on stanchions Sealing rings dirty Renew all seals