TroubleshootingProblem Possible Cause Corrective Action1. A hydraulic fitting is not completelyconnected.1. Check and tighten all fittings.2. A hydraulic fitting is damaged. 2. Replace the damaged fitting.3. There is an obstruction in a hydraulichose.3. Find and remove the obstruction.4. An auxiliary valve on the machine isnot opening.4. Repair the valve.5. The boom-end bearing has failed. 5. Replace the bearing.6. The digging chain is too tight. 6. Adjust the tension on the digging chain.7. There is sand buildup in the tooth rootof the drive sprocket.7. Raise the trencher, run the chainbackward, then decrease the chaintension.The chain does not turn.8. The hydraulic motor or the chain drivehas failed.8. Contact an Authorized Service Dealer.1. The teeth are worn. 1. Replace any worn teeth.2. There is a restriction in a hydraulichose.2. Check the hoses and repair anyproblems found.3. The hydraulic system is too hot. 3. Shut down the system and allow it tocool.The trencher does not dig fast enough.4. The relief valve is set belowspecifications.4. Contact an Authorized Service Dealer.The chain turns in the wrong direction. 1. The hydraulic hoses are reversed. 1. Disconnect the reversed hoses andinstall them correctly.1. The fill plug is leaking. 1. If there is moisture around the wheelplug, change the oil and replace theplug and the plug O-ring.2. The O-ring on the motor has failed. 2. Contact an Authorized Service Dealer.The bearing-case lube is contaminated.3. The seal has failed. 3. Contact an Authorized Service Dealer.26