Manual
Contents
1. MDT7E MAS AR SAFETY PERATION amp MAINTENANCE MANUAL w PARTS LIST This unit is intended for commercial use Address 777 South Street PO Box 2310 Newburgh NY 12550 0606 TEL 800 835 7812 845 565 8850 FAX 800 752 6883 845 565 9392 mastercraftusa com techsupport mastercraftusa com Read and Follow All Instructions Warnings amp Cautions Before Using This Machine This floor sander will afford you many years of trouble free operating satisfac tion provided it is given proper care All parts have passed rigid quality control standards prior to being assembled to produce the finished product Prior to packaging the vacuum was again inspected for assurance of flawless assembly Your floor sander is protectively packed to prevent damage in ship ping We recommend that upon deliv ery unpack the sander and inspect it for any possible damage Only a visu al examination will reveal damage that may have occurred If damage is discovered immediately notify the transportation company that delivered your sander As a shipper we are unable to report claims for con cealed damage You must originate any claims within 5 days This manual is for your protection and information PLEASE READ CAREFULLY since failure to follow precautions could result in discomfort or injury Treat this floor sander as you would any other high grade precision made product Dropping unreasonable bumping across thr2. in the rear of the machine at the base of the handle WARNING To avoid damage to the equipment or personal injury NEVER turn sander ON with the handle in locked upright position NEVER make any handle adjustments unless the motor chassis base is sitting upright flush to the floor To Adjust The Handle 1 Pull up on the upper portion of the lever to release handle 2 Pull the handle back to the appro priate operating position 3 Step down on the lever to lock the handle into position When transporting or attaching the pad driver the handle MUST be LOCKED in the upright position CARE amp MAINTENANCE 1 When not in use power cord should be wrapped around cord hooks for storage 2 With the floor sander unplugged check the power cord for any breaks in the wire Breaks will most likely occur near the plug or switch Any breaks should be repaired or replaced imme diately Read this manual completely before operating the floor sander It is impor tant to follow instructions in this manu al to prevent the possibility of injury or damage to the user and or sander 3 After each use wipe off all of the pol ished and painted areas with a clean cloth 4 When sander is not in use remove pad driver wrap power cord around cord hooks and store in a dry area If the machine wobbles or vibrates When using floor pads to achieve the best results use clean pads frequently changing them as th
3. ANDLE ASSEMBLY PARTS List Ref Part Description Qty Part Ref Part Description Qty Part No No No No 1 Switch Box Cover 1 376647 23 Strain Relief 1 352705 2 12 24 Nut w Lockwasher 3 376744 24 12 24 Hex Nut w Lockwasher 3 376744 3 Ribbed Handle Grip 2 324744 25 Orange Electric Wire Connector 1 398985 4 Handle Bar 1 376612 26 39 Handle Tube 1 353086 5 1 4 X 11 4 Trigger Pin 2 376701 27 0 31 18 X 12 3 Hex Screw 2 232408 6 Roll Pin 4 383139 28 Coiled Spring 2 367184 7 Extension Spring 2 376671 29 Wing Nut 1 380490 8 8 32 X Ye Screw 2 367389 30 S a Flat Washer 1 353221 9 6 32 X 1 Switch Screw 2 335576 31 U Clamp 1 376051 10 25 AMP Micro Switch 1 469629 32 11 2 Swivel Hose Connector 1 349445 11 Cord Clamp 1 342890 33 Plastic Grommet 1 477885 12 6 Internal Tooth Washer 2 355224 34 Pop Rivet 8 318892 13 Leaf Spring 1 335584 35 50 Ft 14 3 Power Cord 1 376809 14 Trigger Lock Spring 2 383147 36 11 2 Swivel Hose Connector 1 349445 15 Plastic Trigger 2 385654 37 37 16 X 3 37 Bolt 1 380504 16 Trigger Kit 2 386839 38 Clamping Lever 1 380520 17 Trigger Lock 2 390119 39 Lever Pin 1 382434 18 6 32 X 1 4 Screw 4 349402 40 Metal Cap 1 380555 19 Reinforced Plate 2 387169 41 Sq Hole Flat Washer 1 382426 20 12 24 X 17h6 Screw 5 376760 42 31 18 Hex Lock Nut 2 354791 21 Switch Box 1 376620 43 3191D 625 OD 250L Spacer 2 232394 22 12 24 X 1 2 Screw 2 312746 a HANDLE ADJUSTMENT The handle adjustment is controlled by a lever
4. e clutch plate slots from drive plate lugs by turning clockwise Disconnect wall plug before leaving floor sander unattended to prevent accidental startup DO NOT operate this sander without brush or pad driver and pad in place Never attempt to lock pad driver on floor sander by positioning JUMPING running floor sander on unattached pad driver DO NOT leave a plugged in floor sander unattended Page 3 CHASSIS ASSEMBLY DRAWING Page 4 CHASSIS ASSEMBLY PARTS List Ref Part Description Qty Part No No 1 Motor Canopy w Stud 1 353132 2 Canopy Bumper 1 441635 3 Capacitor Cover 1 215244 4 Strut Support 1 354570A 5 3 Idler Gear Box Only 1 415642 6 Canopy Bumper 1 468258 7 37 16 Nylok Nut 2 480789 8 Handle Tee 1 234265 9 3 3 Flat Washer 2 353221 10 1 X 5 Grey Wheel 2 357766 11 Spring Washer 2 353248 12 Metal Straight Pin 2 461776 13 37 16 X 21 2 Hex Bolt 2 480290 14 Pop Rivet 3 318906 15 Hose Connector w Rivets 1 310999 16 Circle Gasket 1 320986 17 E Clip Retainer 4 368946 18 6 32 X 75 Screw 2 482188 19 Flat Washer 2 369519 20 6 32 Hex Nut 2 377171 21 Velcro w Peel amp Stick 1 468231 22 Velcro w Brush Strip 1 491926 23 1 a 20 X 3 4 Screw 4 219290 24 25 Lockwasher 4 342858 25 17 Apron 1 227587 26 Apron Handle 1 463302 27 25 20 X 1 2 Screw 4 479861 28 1 5 HP Motor 1 415839 29 1 5 HP Motor amp Gear Box 1 469580 HANDLE ASSEMBLY DRAWING Page 6 H
5. erly installed and grounded in accordance with all local codes and ordinances WARNING If repair or replacement of the cord or plug is necessary DO NOT connect the grounded wire to either flat blade terminal The wire with insulation hav ing an outer surface that is green with or without yellow stripes is the ground ing wire Improper connection of the equipment grounding conductor can result in a risk of electric shock Check with a qualified electrician or service person if you are in doubt as to whether the outlet is properly grounded DO NOT modify the plug provided with the equipment If it will not fit the outlet have a proper outlet installed by a qualified electrician Grounded Outlet This electric equipment is for use on a nominal 120 volt circuit and has a grounded plug that looks like the plug illustrated in Fig A A temporary adap tor that looks like the adaptor illustrat ed in Fig B amp C may be used to con nect this plug to a 2 pole receptacle as Grounded Outlet Box Tab For Grounding Pin Fig B Fig shown in Fig B if a properly grounded outlet is not available The temporary adaptor should be used only until a properly grounded outlet Fig A can be installed by a qualified electrician The green color GROUNDING METHODS rigid ear lug or the like extending from the adaptor must be connected to a permanent ground such as a properly grounded
6. esholds and other misuses may result in a damaged unit which is not be covered by warranty SAVE THESE INSTRUCTIONS Part No 238066 Printed in USA 06 16 08 IMPORTANT SAFETY INSTRUCTIONS WARNING RISK OF EXPLOSION FLOOR SANDING CAN RESULT IN AN EXPLOSIVE MIXTURE OF FINE DUST AND AIR USE FLOOR SANDER MACHINE ONLY IN A WELL VENTILATED AREA To reduce risk of fire electric shock or injury Read all instructions before using this floor sander When using this electric floor sander basic precautions should always be followed including the following 1 DO NOT leave this floor sander plugged in when not in use Unplug from outlet when not in use and or before servicing 2 Electric shock could occur if exposed to rain Store indoors 3 This is NOT a toy Close attention is necessary when used around or near children 4 Use only as described in this manu al Use only manufacturer s recom mended attachments 5 DO NOT use with damaged cord plug If the floor sander is not working as it should because it has been dropped damaged left outdoors or dropped into water contact the manu facturer or authorized service center 6 DO NOT handle the plug or operate with wet hands 9 DO NOT unplug by pulling on cord To unplug grasp the plug not the power cord 7 DO NOT pull or carry by cord use power cord as a handle close a door on cord or pull cord around sharp edges or corners DO NOT run the flo
7. ey load up Always remove pad and driver assem bly when storing the sander A Adjust by turning pad s turn then reinstall on sander B Inspect the pad driver for warpage or out of round Lay floor sander down on handle with pad driver in place With sander running observe if pad driver appears to wobble or is out of round Replace if this problem occurs TROUBLE SHOOTING GUIDE PROBLEM Motor won t run Possible Cause 1 Blown fuse or tripped circuit breaker 2 Defective switch 3 Defective power cord WARNING Always disconnect power cable from electrical outlet when working on the floor sander Possible Solution 1 Replace fuse or reset circuit breaker 2 Replace switch 3 Replace power cord PROBLEM Floor machine runs slow Possible Cause 1 Low line voltage PROBLEM Noisy machine Possible Cause 1 Defective motor or gear box Possible Solution 1 If voltage is under recommended minimum check size of wiring from main switch If okay contact power company Possible Solution 1 Contact the manufacturer or authorized service center Part No 238066 Printed in USA 06 16 08
8. or sander over the cord Keep cord away from heated surfaces 8 DO NOT put any object into motor openings 10 Keep hair loose clothing fingers and all parts of body away from mov ing parts 11 DO NOT operate where oxygen or anesthetics are used 12 DO NOT use around flammable or combustible liquids such as gasoline or use in areas where they may be present 13 DO NOT use an extension cord unless absolutely necessary If an extension cord is used then wire size must be 14 gauge or thicker and should not exceed 50 feet in length Use only a three wire grounded exten sion cord to ensure grounding protec tion 14 Replace damaged or worn parts immediately with genuine original equipment parts to maintain safety and to protect your limited warranty 15 Floor sanding can result in an explosive mixture of fine dust and air Use a floor sanding machine only in a well ventilated area and with the vac uum cleaner hooked up and operat ing GROUNDING INSTRUCTIONS Electrical equipment must be ground ed If it should malfunction or break down grounding provides a path of least resistance for electrical current to reduce the risk of electric shock This floor sander is equipped with a cord DANGER Improper use of the grounding plug can result in a risk of electric shock having an equipment grounding con ductor and grounding plug The plug must be inserted into an appropriate outlet that is prop
9. outlet box cover Whenever the adaptor is used it must be held in place by a metal screw Note In Canada the use of a temporary adaptor is not permitted by the Canadian Electrical Code This floor sander is designed to move from side to side Raise handle slightly to guide right As handle is raised high er the faster it will move to the right Lower the handle to guide left Likewise the more you lower handle the faster it will move to the left Plug in the power cable With pad driv er in position adjust handle and lock into a comfortable operating position Place hands on handle grips and squeeze trigger locks beneath grips This will activate the motor and start pad driver operating OPERATION INSTRUCTIONS Begin operating this floor sander at the closet possible point to an electri cal outlet and work away from the out let This will prevent running over the electrical cord 1 Unplug power cable and LOCK handle in upright position 2 Tilt the floor sander back until the handle is laying on the floor and underside of the machine is fully exposed 3 Holding the pad driver in both hands straddling the motor with your back to the handle bend over and fit the three slots of the clutch plate over the three lugs of the drive plate Pap DRIVER INSTALLATION 4 Turn the pad driver counterclock wise as far as it will go lt is now seated and ready for operation To Remove Disengage th
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