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Hersteller: MTD Dateigröße: 2.17 mb Dateiname: Unterrichtssprache:

When the directional valve is directing the flow to the back of the cylinder, the cylinder rod extends quickly until it meets significant resistance. Upon reaching unloading pressure, movemen of the shaft will slow but will continue forward. If the pressure reaches a preset maximum (called relief valve pressure) the relief valve, located within the directional valve, will allow the flow to bypass the cylinder and return to the reservoir. This can happen when the cylinder rod meets excessive resistance, or when it reaches the end of its stroke and can move no farther. NOTE: Never operate at relief valve pressure for more than a few seconds. When the directional valve is directing the flow to the front of the cylinder, the rod will retract quickly since it is encountering no resistance. The relief valve will momentarily bypass the flow at the end of the return stroke but the directional valve should then automatically return to the neutral position, directing the flow directly into the reservoir. This serves to protect the pump from possible damage due to prolonged operation at relief valve pressure. Because of the potential for system damage, the relief valve is carefully and precisely preset by the manufacturer. NOTE: The user should not attempt to adjust or change the setting of the relief valve. OPERATIONAL PROBLEMS If you have trouble with your log splitter, please refer to the Hydraulic Trouble Shooting Guide. NOTE: Readjustment of valves or disassembly of pump should be performed by an authorized service dealer only. 14 I HYDRAULIC TROUBLE SHOOTING GUIDE Problem Probable Cause(s) Corrective Action Cylinder rod will not move A Broken driveshaft B Loose shaft coupling C Gear sections damaged D Damaged relief valve E Hydraulic lines blocked F Too little oil to pump G Damaged directional valve H Blocked directional valve A Return pump for authorized repair B Correct engine/pump alignment as necessary C Return pump for authorized repair D Return directional valve for authorized repair E Flush and clean hydraulic system F Add oil to reservoir G Return directional valve for authorized repair H Flush and clean hydraulic system; return directional valve for authorized repair Slow cylinder shaft speed while extending and retracting A Gear sections damaged B Excessive pump inlet vacuum C Slow engine speed D Damaged relief valve E Too little oil to pump F Air in oil G Directional valve leaking internally H Internally damaged cylinder A Return pump for authorized repair B Make certain pump inlet hoses are clear and unblocked—use short, large diameter inlet hoses C Return engine for authorized repair D Return directional valve for authorized repair E Add oil to reservoir F Add oil, clean reservoir, make certain oil return tube is below oil level G Return directional valve for authorized repair H Return cylinder for authorized repair Engine runs but wood will not split, or wood splits too slowly A Small gear section damaged B Pump check valve leaking C Excessive pump inlet vacuum D Low relief valve setting E Too little oil to pump F Air in oil G Directional valve leaking internally H Overloaded cylinder I Internally damaged cylinder A Return pump for authorized repair B Return pump for authorized repair C Make certain pump inlet hoses are clear and unblocked; use short, large diameter inlet hoses D Adjust valve while using pressure gauge* E Add oil to reservoir F Add oil, clean reservoir, make certain oil return tube is below oil level G Return directional valve for authorized repair H Do not attempt to split wood against the grain I Return cylinder for authorized repair Engine stalls during splitting A Low horsepower/weak engine B Overloaded cylinder A Return engine for authorized repair B Do not attempt to split wood against the grain Engine will not turn or stalls under low load conditions A Engine/pump misalignment B Frozen or seized pump C Low horsepower/weak engine D Hydraulic lines blocked E Blocked directional valve A Correct alignment as necessary B Return pump for authorized repair C Return engine for authorized repair D Flush and clean hydraulic system E Flush and clean hydraulic system; return directional valve for authorized repair Leaking pump shaft seal A Broken driveshaft B Engine/pump misalignment C Gear sections damaged D Poorly positioned shaft seal E Plugged oil breather A Return pump for authorized repair B Correct alignment as necessary C Return pump for authorized repair D Return pump for authorized repair E Make certain reservoir is properly vented *Should be performed by an authorized service dealer only. 15 Models 635 and 636 NOTE: The engine is not under warranty by the log splitter manufacturer. . .If repairs or service is needed on the engine, please contact your nearest authorized engine service outlet. Check the “Yellow Pages” of your telephone book under “Engines-Gasoline.” Find It Fast In The Yellow Pages NOTE Specifications subject to change without notice or...

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