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Производитель: Hitachi Размер: 433.39 kb Название файла: 308532m.pdf Язык инструкции:

Each 100 hours of operation or 3 months Clean or replace paper air cleaner cartridge. Tap gently to remove dirt. Change engine oil. Use SAE 30 or 10W–30 detergent oil. Each 500 hours of operation or 6 months Change pump oil. Use SAE 20 or 30 non–detergent oil or genuine CAT pump oil. 308532 9 Troubleshooting WARNING To reduce risk of serious injury, including fluid injection and splashing in eyes, or on skin, always follow Pressure Relief Procedure on page 6 before proceeding. Problem Cause Solution Engine will not start or No gasoline in fuel tank or carburetor. Fill the tank with gasoline, open fuel shut off valve. is hard to start Low oil level. Start/Stop switch in Stop position. Water in gasoline or old fuel. Loose or wrong battery connection. Battery not properly charged. Choked improperly. Flooded engine. Dirty air cleaner filter. Spark plug dirty, wrong gap or wrong type. Spray gun closed. Check fuel line and carburetor. Add to proper level. Move switch to start position. Drain fuel tank and carburetor. Use new fuel and dry spark plug. Check and tighten battery connections. Check electrolyte level of cells, recharge battery. Open choke and crank engine several times to clear out gas. Remove and clean. Clean, adjust the gap or replace. Trigger spray gun. Engine misses or lacks power Partially plugged air cleaner filter. Spark plug dirty, wrong gap or wrong type. Incorrect ignition timing. Remove and clean. Clean, adjust the gap or replace. Time engine. Low pressure and/or Worn or wrong size tip. Replace with tip of proper size. pump runs rough Inlet filter clogged. Worn packings, abrasives in water or natural wear. Inadequate water supply. Belt slippage. Fouled or dirty inlet or discharge valves. Even a small particle can cause the valve to stick. Restricted inlet. Worn inlet or discharge valves. Leaking high pressure hose. Clean. Check more frequently. Check filter. Replace packings. See PUMP SERVICE. Check water flow rate to pump. Tighten or replace; use correct belts and replace both at same time. Clean inlet and discharge valve assemblies. Check filter. Check garden hose, may be collapsed or kinked. Replace worn valves. Replace high pressure hose. Water leakage from under pump manifold Worn packings. Install new packings. See PUMP SERVICE. Water in pump Humid air condensing inside crankcase. Worn packings. Oil seals leaking. Change oil as specified in MAINTENANCE. Install new packings. See PUMP SERVICE. Install new oil seals. See PUMP SERVICE. Frequent or Scored, damaged or worn plungers. Install new plungers. See PUMP SERVICE. premature failure of Abrasive material in the fluid being pumped. Install proper filtration on pump inlet plumbing. the packings Inlet water temperature too high. Overpressurizing pump. Excessive pressure due to partially plugged or damaged tip. Pump running too long without spraying. Running pump dry. Check water temperature; may not exceed 160F. Do not modify any factory–set adjustments. See EQUIPMENT MISUSE HAZARD. Clean or replace tip. See Installing and Changing Spray Tips. Never run pump more than 10 minutes without spraying. Do not run pump without water. Strong surging at the inlet and low pressure on the discharge side Foreign particles in the inlet or discharge valve or worn inlet and/or discharge valves. Clean or replace valves. See PUMP SERVICE. 10 308532 Pump Service Servicing the Valves 1. Remove the hex valve plug. 2. Examine the o–ring under the plug for cuts or distortion and replace if worn. Lubricate new o–ring before installing. 3. Grasp valve retainer by tab at the top with pliers and remove from valve chamber. Valve parts usually separate during removal. Note: A special tool will be needed to remove the seat from the manifold. A reverse pliers or a standard vise grip and a 1/4” x 3” bolt to fit I.D. of seat inserted under the edge of the seat, will pry the valve seat out easily. 4. Examine all valve parts for wear and replace with preassembled valve assembly in service kit containing retainer, spring, valve, valve seat, o–ring, and back–up ring. 5. Grasp new valve assembly by tab at top with pliers, immerse in oil and push into valve chamber. Be certain valve assembly is square in valve chamber. 6. Apply Loctite 242 to valve plug, thread into manifold port and torque per chart. Note: Corrosion Resistant models require the coil spring installed in the Valve Plug. Servicing the Pumping Section Disassembly: 1. Remove the four (4) hex nuts or two (2) bolts from the manifold (varies with model). 2. Rotate crankshaft by hand to start separation of manifold from crankcase. Support the underside of the manifold and tap lightly with a mallet to remove the manifold assembly. CAUTION Keep manifold properly aligned with ceramic plungers when removing to avoid damage to either plungers or seals. 3. Remove oil pan and slide out seal retainer with wicks. 4. Using a wrench, loosen the plunger retainer. Grasp ceramic plunger and push toward crankcase until plunger ret...

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