. After each use, wipe all surfaces of the pressure washer with a clean, damp cloth. . Perform the appropriate maintenance. See Maintenance Chart at right. Maintenance Observing regular maintenance intervals helps ensure that you get maximum performance and life from the pressure washer. There is a break-in period for the engine and pump. After you change the oil in these components following their respective break-in periods, the interval between required changes is longer. If the pressure washer is operated in dusty conditions, these maintenance checks should be made more often. Maintenance Chart Relieve the pressure (see page 5) before you proceed with maintenance. Interval What to do Daily Clean water inlet screen and filter. Check engine and pump oil levels. Fill as necessary. Check gasoline level. Fill as necessary. After first 5 hours of operation Change engine break-in oil. Drain oil when warm. Use SAE 30 or 10W–30 detergent oil. After every 25 hours of operation Clean and remove air cleaner foam. Wash with water and detergent. Dry thoroughly. Rub with oil, and squeeze to distribute oil. After first 50 hours of operation Change pump break-in oil. Use SAE 20 or 30 non-detergent oil. After every 100 hours of operation, or every 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. After every 500 hours of operation, or every 6 months Change pump oil. Use SAE 20 or 30 non-detergent oil. 308524 7 Pump Service Repair kits are available. See Pump Repair Kits on page 13. For the best results, use all parts in the kits. Relieve the pressure (see page 5) before you proceed with service. NOTES: . The following metric wrenches are needed: 10 mm, 13 mm, and 30 mm. . There are two tool kits to aid in servicing the pump. Kit 800298 is used to ease installation of packings. Kit 800271 includes the items in 800298 and tools to aid in the removal of packing retainers. Valves NOTE: For a set of six valves, order 801472. 1. Remove the hex plug from the manifold using a 30 mm wrench. 2. Examine the o-ring under the hex plug and replace it if it is cut or distorted. 3. Remove the valve assembly from the cavity; the assembly may come apart. 4. Install the new valve. Install the o-ring and hex plug; torque to 75 ft-lb (103 Nm). NOTE: Retorque the plug after 5 hours of operation. Pumping Section 1. Remove the eight capscrews and lockwashers from the manifold using a 13 mm wrench. 2. Carefully separate the manifold from the crankcase. NOTE: You might have to tap the manifold lightly with a soft mallet to loosen it. CAUTION To avoid damage to the plunger or seals, keep the manifold properly aligned with the ceramic plungers when you remove it. 3. Carefully examine each plunger for any scoring or cracking, and replace as necessary. Servicing the Plungers NOTE: Plunger repair kit 801474 is available to replace retainers, o-rings, washers, and backup rings for three cylinders. 1. Loose...

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