Kärcher 550.0 Operator's Manual

Kärcher 550.0 Operator's Manual Manual pdf 14 page image

9.800-079.0 • Rev. 05/14OPERATOR’S MANUAL PRESSURE WASHER14as can be obtained, then repeat the above procedureon the air band setting.Fuel Pressure Adjustment:To adjust fuel pressure, turn the adjusting screw clock-wise to increase, counterclockwise to decrease. Do notexceed 200 psi. NOTE: When changing the fuel pump,a bypass plug must be installed in the return port or thefuel pump will not prime.Removal of Soot and Heating Coil:In the heating process, fuel residue in the form of sootdeposits may develop on the heating coil and block airflow which will affect burner combustion. When soothas been detected on visual observation, the sooton the coil must be washed off after following the coilremoval steps.1. Remove the tank head assembly by lifting the tankhead off.2. Remove the two pipe nipples and associated fit-tings.3. Lift the coil out of the outer wrap.CAUTION: The coil weighs about 80 lbs. Use properlifting techniques.4. Clean, repair and replace the coil by reversing theabove steps.Coil Reinstallation:Reinstall by reversing the above steps 4 through 1.Final Note:The 12 VDC burner systems can draw as much as 18amps! For such burners to run properly, the battery andengine charging system must be kept in good condition.The engine must run at the correct RPM to adequatelycharge the battery. It is equally important not to throttledown the engine on models without batteries, since allpower to run the burner comes solely from the engine.Do not throttle down the engine at anytime while themachine is operating.MAINTENANCEKarcher Clear Fire Oil BurnerBurner Air Adjustment: The oil burner on this machineis preset for operation at altitudes below 1000 feet. Ifoperated at higher altitudes, it may be necessary toadjust the air band for a #1 or #2 smoke spot on theBacharach scale.To adjust, start machine and turn burner ON. Loosentwo locking screws found on the air band and close airband until black smoke appears from burner exhaustvent. Note air band position. Next, slowly open the airband until white smoke just starts to appear. Turn airband halfway back to the previously noted position.Tighten locking screws.KNA Burner Air AdjustmentReference NumbersAir Band Locking ScrewsAir BandCAUTION: If white smoke appears from burner ex-haust vent during start-up or operation, discontinueuse and readjust air bands.NOTE: If a flue is installed, have a professional service-man adjust your burner for a #1 or #2 smoke spot onthe Bacharach scale.