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NO SMOKING! WARNING: Before raising or removing the recovery tank, be sure tank is empty. Do not operate or perform maintenance on the machine while the recovery tank is in the open position. The tank can be accidentally bumped and it may slam shut. 1. Disconnect the batteries. Use a cloth and a solution of ammonia or bicarbonate of soda to wipe the top of the batteries. Clean the battery terminals. Reconnect the batteries. 2. Check the hoses for leaks, obstructions and other damage. 3. On machines with cylindrical brush head, check the brush drive belts for proper tension. Belts must be tensioned properly to prevent slipping. To tighten the belts, follow this procedure: a. Remove belt cover by removing screws. b. Loosen the 2 screws on either side of the motor pulley. c. Use a small pry bar or large screwdriver to pry the motor upward to achieve correct belt tension. Pry on the motor close to where the motor contacts the brush head casting (See Figure 36, A). d. Hold tension and tighten 2 screws (See Figure 36,B). e. Replace belt cover. A B Figure 36 CLARKE TECHNOLOGY Operator's Manual -SCRUBTEC 743 and 751 Page -25 Maintenance Maintenance To remove the squeegee, follow this procedure: 1. Remove the squeegee assembly by loosening the two knobs that attach the squeegee to the machine. Pull the squeegee assembly off (See figure 37). 2. Inspect the squeegee blade. 3. If the blade is worn, turn the blade so that a new edge is in the wiping position. 4. Reinstall squeegee assembly on the machine. How To Adjust The Squeegee The following adjustments are set at the factory, however they may require slight adjustment. Adjusting Squeegee Tilt: The tilt of the squeegee causes the rear blade to raise up in the center or on the ends, depending on which direction the tilt is changed. For tilt adjustment, refer to figure 38. Loosen left and right screw "X". In order to bring the blades down in the center, tip "Y" down. To bring both ends down, tip "Y" up. Make very small adjustments and try it until a uniform flare is achieved. Adjusting Squeegee Blades: When properly installed the front blade should be approximately 0.06" (1.5mm) above the rear blade (See figure 39). WARNING: Maintenance and repairs must be done by authorized personnel only . WARNING: Electrical repairs must be done by authorized personnel only. Consult your authorized service person to do the service procedures. Use only genuine ALTO parts. Figure 37 Figure 38 REAR BLADE 0.06 (1.5 mm) Figure 39 Page -26- CLARKE TECHNOLOGY Operator's Manual -SCRUBTEC 743 and 751 SCRUBTEC 743 and 751 Accessories ACCESSORIES Description Part No. Clarke Care Kit 14607A 29" Squeegee Assembly 18820A 32" Squeegee Assembly 10129A Poly Dur Protectant 50478A Hour Meter Kit 10656A Key Switch Kit 10490A Parking Brake Kit 10491A Vacuum Muffler Kit 10492A Power Wand Kit 10489A Urethane Caster Assembly 61290A Dual Direct Clutch Plate 30034A Center Lock Pad Retainer 56941A Squeegee Hose "S" Trap 30482A Rotary Disk Brushes and Pad Assemblies: Description (743) Part No. (751) Part No. Pad Driver Asm. 10405A 30629A Polypropylene 52539A 30630A Nylon 52540A 30631A Lite Grit 52543A 30632A Clean Grit 52541A 30633A Cylindrical Brushes Size Description Part No. 4" Polypropylene 30231A 4" Nylon 30232A 4" Clean Grit 30233A 4" Super Grit 30234A 29" Squeegee Blades Description Part No. Blade, Rear - Gum Rubber 30931A Blade, Rear - Nitrile Solid 30938A Blade, Front - Ribbed Urethane 30951A Blade, Front - Notched Neoprene 30930A 32" Squeegee Blades Description Part No. Blade, Rear - Gum Rubber 30067A Blade, Rear - Nitrile Solid 30081A Blade, Rear - Ribbed Orange 30085A Blade, Front - Ribbed Natural 30066A Blade, Front - Slit Grout 30079A Blade, Front - Ribbed Orange 30083A CLARKE TECHNOLOGY Operator's Manual -SCRUBTEC 743 and 751 Page -27 HOW TO CORRECT PROBLEMS IN THE MACHINE PROBLEM CAUSE ACTION There is no solution flow. The solution tank is empty. There is an obstruction in the solution hose or filter. The solution valve or electric wiring is damaged. The control module is defective. Fill the solution tank. Remove the obstruction from the hose or filter. Repair or replace the valve or the electric wiring. Replace control module The solution flow does not stop. The solution valve is open. The solution valve or wiring is damaged. The solution valve is dirty There is a damaged seat and washer in the solution valve. The control module is defective. Close or Clean the solution valve. Repair or replace the valve and the wiring. Clean the solution valve. Replace the seat and washer. Replace control module. The machine does not remove all the water from the floor. The squeegee is up. The squeegee tilt is not correct. The recovery tank is full. The screen filter is dirty. There is an obstruction or damage in the squeegee or squeegee hose. The vacuum motor is not running. The squeegee hose is disconnected, or damaged The squeegee blade is damaged, worn, or incorrectly installed. The gaskets on the cover ...

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