Landa VHP Series Operator's Manual

Landa VHP Series Operator's Manual Manual pdf 23 page image

23MaintenanceTroubleshootingPROBLEM POSSIBLE CAUSE SOLUTIONPULSATION Faulty pulsation damper Check precharge. If low, recharge or installnew one.LOWPRESSUREWorn nozzle Replace with nozzle of proper size.Belt slippage Tighten or replace with correct belt.Air leak in inlet plumbing Disassemble, reseal and reassemble.Relief valve stuck, partially plugged orimproperly adjusted. Valve seat wornClean and adjust relief valve; check forworn or dirty valve seats. Kit available.Inlet suction strainer clogged orimproperly sizedClean. Use adequate size. Check morefrequently.Worn packing.Abrasives in pumped in cavitation. Inade-quate waterInstall proper filter. Suction at inletmanifold must be limited to lifting less than20 feet of water or 8.5 psi vacuum.Fouled or dirty inlet or discharge valves Clean inlet and discharge valveassemblies.Worn inlet, discharge valve blockedor dirtyReplace worn valves, valve seats and/ordischarge hose.Leaky discharge hose Replace.PUMP RUNSEXTREMELY ROUGH,PRESSUREVERY LOWRestricted inlet or air entering the inletplumbingProper size inlet plumbing; check for airtight seal.Inlet restrictions and/or air leaks. Stuckinlet or discharge valveReplace worn cup or cups. Clean outforeign material. Replace worn valves.WATER LEAKAGEFROM UNDERMANIFOLD.Worn packing Install new packing.OIL LEAKING IN AREAOF CRANKSHAFTWorn crankshaft seal or improperlyinstalled oil seal O-ringRemove oil seal retainer and replacedamaged O-ring and/or seals.Bad bearing Replace bearing.EXCESSIVEPLAY IN END OFCRANKSHAFTPULLEYWorn main bearing from excessivetension on drive beltReplace crankcase bearing and/ortension drive belt.WATER INCRANKCASEHumid air condensing into water insidecrankcaseChange oil intervals. Use any high gradeautomotive 30 weight non-detergent oil.Worn packing and/or piston rod sleeve;O-rings on plunger retainer worn Replace packing. Replace O-rings.OIL LEAKING FROMUNDERSIDE OFCRANKCASEWorn crankcase piston rod seals Replace seals.OIL LEAKING ATREAR PORTIONOF CRANKCASEWorn crankcase piston rod seals Replace seals.LOUD KNOCKING Pulley loose on crankshaft Check key and tighten set screw.NOISE IN PUMP Broken or worn bearing Replace bearing.Landa VHP 2-1500 / 3-2000 Operator’s Manual 8.913-949.0 - T