Mastercraft Mthc-16lr, Mthc-16hr Owner's Manual

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MTHC-16E-1760

ULTI-PURPOSE

FLOOR MACHINE

SAFETY, OPERATION &

AINTENANCE

MANUAL W/PARTS LIST

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READ & FOLLOW ALL INSTRUCTIONS,

ARNINGS & CAUTION

BEFORE USING THIS FLOOR MACHINE

This floor machine will afford you many years of trouble free operating satisfaction if it is given proper care. All parts have passed rigid quality control standards before being assembled to produce the finished product. Prior to packaging, units are again inspected for assurance of flawless operation.

This floor machine was protectively packed to prevent damage in shipment. We recommend that upon delivery, remove the unit from its carton and carefully inspect it for any possible damage in transit. A warranty card is affixed to the handle. It is your responsibility to fill it out and send it to our office to register your purchase and start your warranty. Failure to send us this card in one week upon receipt of the machine may void the warranty.

If damage is discovered, immediately notify the transportation company that delivered your floor machine. As a shipper, we are unable to act upon any claim for concealed damage. You must originate any claim within 5 days of delivery.

These instructions are for your protection and information. PLEASE READ CAREFULLY! Failure to follow these precautions could result in injury or discomfort.

Treat this floor machine as you would any other high grade precision made product. Throwing, dropping, unreasonable bumping across thresholds and other misuse may result in a damaged unit and invalidate the warranty.

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Parts and Service Center

777 South Street,

Newburgh NY 12550-0606

PPhhoonnee::

845/565/6623

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845/565/8894

PLEASE READ

CAREFULLY

BEFORE

OPERATING

SAVE THESE INSTRUCTIONS

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PN 464325 Rev B - MTHC16EHR-1760 Floor Machine - Printed in USA 12/17/07

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MPORTANT

AFETY

NSTRUCTIONS

WARNING:

To reduce the risk of fire, electric shock or injury;

Read all instructions before using this floor machine.

1) DO NOT leave the floor machine plugged in when not in use. Unplug from the 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 manual. Use only manufacturer's recommended attachments.

5) 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 machine over cord. Keep cord away from heated surfaces.

6) DO NOT use with damaged cord plug. If the floor machine is not working as it should

because it has been dropped, damaged, left outdoors, or dropped into water, contact the manufacturer or authorized service center.

7) DO NOT use an extension cord.

8) DO NOT handle the plug or operate with

wet hands.

9) DO NOT put any object into the motor openings.

10) DO NOT unplug by pulling on cord. To unplug, grasp plug, not the power cord.

11) Keep hair, loose clothing, fingers and all parts of body away from moving parts.

12) DO NOT use an optional vacuum without manufacturer’s filters in place.

13) DO NOT operate where anesthetics and oxygen are used.

GROUNDING INSTRUCTIONS

Improper use of the grounding plug can result in a risk of electrical shock.

This unit must be grounded. If it should malfunction or breakdown, grounding provides a path of least resistance for electrical current to reduce the risk of electric shock. This machine is equipped with a cord having an equipment-grounded plug. The plug must be inserted into an appropriate outlet that is properly installed

14) DO NOT use around flammable or combustible liquids such as gasoline or use in areas where they may be present.

1155))

Replace damaged or worn parts immediately with genuine manufacturer’s equipment parts to maintain safety and protect your limited warranty.

16) Floor sanding can result in an explosive mixture of fine dust and air. Use a floor sanding machine only in a well ventilated area.

17) DO NOT to leave sawdust in the filter bag when sander is not in use, this is a fire hazard.

This floor machine must be connected to a properly grounded outlet only. (See grounding method below.)

ANGER:

and grounded in accordance with all local codes and ordinances

If repair or replacement of the cord or plug is necessary, DO NOT connect the grounding wire to either flat blade terminal. The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire.

GROUNDING METHODS

This floor sander is for use on a nominal 120 volt circuit, and has a grounding plug that looks like the plug illustrated in (Fig A). A temporary adaptor that looks like the adaptor illustrated in (Fig B & C) may be used to connect the plug to a 2-pole receptacle as shown in (Fig A) if a properly grounded outlet is not available.

Improper connection of the equipment-grounding conductor can result in a risk of electrical 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

machine. If it will not fit the outlet, have a proper outlet installed by a qualified electrician.

NOTE: In Canada, the use of a temporary adaptor is not permitted by the Canadian Electrical Code.

The temporary adaptor should be used only until a properly grounded outlet (Fig A) can be installed by a qualified electrician. The green color rigid ear, lug, or like extending from the adaptor must be connected to a permanent ground such as a properly grounded outlet box cover. Whenever the adaptor is used, it must be held in place by the metal screw (Fig C).

WARNING:

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CAUTION:

When installing or changing the accessories, turn OFF the sander

and disconnect the power cord from the electrical outlet.

When installing or removing attachments, always wear protective gloves and start at the 12 o’clock position.

Before Installation or Changing of Attachments:

1) Unplug the sander from the wall outlet.

2) Ensure handle is in the storage position

(straight up) and locked in place with the quick release pin.

3) Tilt machine back by bracing it with your foot until the handle is laying on the floor and the three heads are fully exposed.

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It is recommended that a towel or pad is

placed under the machine to protect the floor.

Changing and Installation the Attachments

1) Position the first attachment head at 12 o’clock.

2) Using both hands, reach beneath the bottom side of the attachment and pull up towards yourself to free it from the sander.

3) Select the attachment required for the job, and line up the holes on the attachment with the four metal pins protruding from each of the three heads.

ATTACHMENTS

INSTALLATION &

HANGING

4) Push the attachments on by hand and if necessary, carefully tap it into place with a rubber mallet.

5) Repeat steps 1 thru 4 with the remaining 2 attachments.

6) Carefully raise the handle, supporting the axle with your foot to control the head of the machine as it is placed on the floor.

7) Since the attachments are different heights you may need to adjust the dust skirt to make sure it is level with the attachments. This will ensure clean and virtually dust-free operation.

9) To adjust skirt, align the skirt with the center of the machine and wrap it around.

10) Move the handle back to the operating position and lock in place with the quick release pin.

CAUTION:

DO NOT attempt to operate this machine if it is not fully assembled.

When servicing or replacing an accessories turn

and disconnect from power source.

To start operating, tilt machine back on transport wheels, turn

machine and carefully lower machine onto the working surface.

1) Clear the floor of any materials or objects.

2) Select and install the accessory set

required for the job. (See above for installation instructions.)

3) Move handle from the upright “storage” position to the angled “operating” position and lock in place with the quick release pin.

4) Place your hands on the handle grips tilt sander back on the transport wheels.

5) Engage the safety trigger and trigger lock beneath the right handle grip.

6) When the machine is running, carefully lower it onto the working surface and release the trigger lock.

7) To stop the machine release the safety trigger and it will automatically turn OFF.

8) Move the machine side-to-side while maintaining a steady, consistent pace with the machine.

OFF

the machine

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FLOOR

MACHINE

OPERATION

INSTRUCTION

9) When not in use a set of attachments MUST be left on the sander to protect the

heads.

Note: If the machine unexpectedly shuts down due to a circuit overload, before restarting the wait 30 seconds, then press the reset button .

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MTHC-16E-1760 16” HANDLE/BASE ASSEMBLY DRAWING & PARTS LIST

SWITCH BOX ASSEMBLY

_________________________________

Ref Part Description Qty Part No No

_________________________________

1 Rubber Handle Grip 2 490180 2 Strain Relief Assembly 1 425427 3 30 Ft Power Cord w/Plug 1 491160 4 Handle Assembly 1 495840 5 Quick Release Pin w/Cable 1 456896 6 Wire Retainer 1 479152 7 Bronze Bushing 2 491055 8 .37-16 X

9 Motor Cord w/Female Plug 1 490210 10 Wheel Base Assembly 1 493716 11 6” X 2” Wheel 2 490903 12 Palnut 2 490881 13 15 AMP Circuit Breaker 1 496979 14 Trigger Lock 1 390119 15 Plastic Trigger Kit 1 386839

/2” Shoulder Bolt 2 491063

_________________________________

Ref Part Description Qty Part No No

_________________________________

16 Trigger 1 385654 17 Small Trigger Spring 1 376671 18 Large Trigger Spring 1 383147 19 80-32 X 5/8” Screw 1 374075 20 Roll Pin 2 383139 21 .10-24 X .63 Shoulder Screw 1 495875 22 #6 Int Tooth Lockwasher 2 355224 23 6-32 X.87 Screw 2 335576 24 Micro Switch 1 469637 25 Leaf Spring 1 335584 26 Micro Switch 1 495867 27 Vinyl Cap 1 459933 28 Mounting Bracket 1 495824 29 .25-20 X 2 Switch Box Plate 1 493481

/2” Screw 2 413291

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AGE 4

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MTHC-16E-1760

16” OUTER BOWL

DRAWING &

ARTS LIST

AGE 5

_______________________________

Ref Part Description Qty Part No No

_______________________________

111/2HP Motor, 1760 RPM’s 1 497207 2 Rivet 2 374768 3 Spacer 1 490873 4 Recess Plug 1 490865 5 20# Weight (Optional) 1 491691 6 Nyloc Nut 3 380784 7 Weight Knob 3 491632 8 Bowl Handle 2 490385

9 16” Outer Bowl Assembly 1 492051 10 Velcro Strip 1 491659 11 Rubber Dust Skirt 1 491640

12 13 14 .37 Washer 4 368849 15 1 16 Felt Gasket 1 450073 17 .37-16 X 1” Bolt 4 368830

_______________________________

/2-20 X 5/8” Screw 4 457310

/4-20 X .75” Screw 3 342831

/4” External Snap Ring 1 491292

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MTHC-16E-1760 16” I

NNER BOWL

DRAWING & PARTS L

IST

___________________________________

RReeff PPaarrtt DDeessccrriippttiioonn QQttyy PPaarrtt NNoo NNoo

___________________________________

127/8Internal Snap Ring 1 490598 2 Bearing (6009-2RS) 2 490563 3 Large Bearing Spacer 1 490571 4 Outer Pulley Shaft 3 490547 5 16” Inner Bowl 1 490407 6 Center Cog Pulley 1 494836 7 Shaft Spacer 3 490555 81

9 Ball Bearing w/Seals 6 464910 10 Small Bearing Spacer 3 490474 11 Flange 1 490989 12 Low Profile Bolt 1 490997 13 3” ID x 6” OD Ring 3 222828 14 #10-32 x .5 Phillips Screw 9 377201

___________________________________

/2Internal Snap Ring 3 490466

___________________________________

RReeff PPaarrtt DDeessccrriippttiioonn QQttyy PPaarrtt NNoo NNoo

___________________________________

15 Accessory Pins 12 490458 16 .62-11 Nylock Nut 3 490628 17 Washer 3 490636 18 Felt Gasket 3 491373 19 Aluminum Ring 3 490652 20 Pop Rivet 12 456918 21 .25-20 x .5 Phillips Screw 9 331740 22 #14, .43”OD Lockwasher 9 491012 23 Aluminum Cover Plate 1 490644 24 Belt 25 48 High Tooth Pulley 1 490512 26 48 Middle Tooth Pulley 1 490490 27 48 Low Tooth Pulley 1 490415

(210-L050) 3 494089

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WARNING:

VACUUM

IF THIS FLOOR MACHINE IS USED FOR SANDING,

DO NOT LEAVE SAWDUST IN THE FILTER BAG WHEN THE

MACHINE IS NOT IN USE. THIS IS A FIRE HAZARD.

This machine can be used with a variety of vacuums to pick up wood and concrete dust.

Operation of the vacuum cleaner must be in accordance with the specific manufacturer’s safety & operation instructions.

1) Unplug the motor power cord from the handle.

2) Pull the speed pin from the handle and remove the handle. Carefully set aside the handle.

Recommend separate dedicated power source for machine and vacuum.

The vacuum hose must be attached to the

/2” hose barb on the outer bowl of the

1 floor machine.

BELT CHANGING INSTRUCTIONS

3) Turn sander chassis upside down on a table resting on the motor cover.

4) Remove pads/attachments (see page 3 for instructions.)

5) Remove the 9 Flat head screws and beveled washers from cover plate.

6) Remove the cover plate from inner bowl.

7) Vacuum up the dust and debris from inner

OPERATING

INSTRUCTIONS

During operation, periodically check the vacuum. When the cloth or paper filter bag is 3/4full or dust is forming around the bottom of the machine, it MUST be emptied.

bowl.

8) Remove the old belt or belts by pulling upwards and and roll off using a screwdriver while turning the pulley.

9) Roll new belt or belts back on the pulley.

10) Reassemble the machine reversing the

above steps.

CAUTION:

This machine is designed for surfacing concrete and sanding wood floors.

All operators and maintenance personnel should read and

understand the safety procedures with this floor machine

1) All personnel in the immediate work area must wear safety glasses with side shields whenever the machine is in operation. Protective clothing is also recommended. Long sleeve shirts and safety shoes should be worn. Avoid wearing loose clothing.

2) DO NOT attempt to service or replace

1) Unplug the machine.

2) After each use, wipe off machine with a

clean cloth.

3) Empty the vacuum you are using in accordance with specific manufacturer’s safety & operation instructions.

attachments while the machine is running or connected to a power source.

3) DO NOT operate this machine in the rain or in areas where liquids could enter the electrical components of the machine.

4) Keep the power cord away from the revolving heads to avoid damage.

3) Check for loose parts and fasteners.

4) Check the power cord for any breaks in

the wire. Breaks will most likely occur near the plug or switch. Repair or replace any breaks immediately.

GENERAL SAFETY

PRECAUTIONS

5) Check the main power supply to assure that you are connecting the equipment to a proper dedicated service.

MACHINE

MAINTENANCE

AGE 7

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TROUBLE SHOOTING GUIDE

PROBLEM: Motor will not run.

POSSIBLE CAUSE POSSIBLE SOLUTION

1) Defective switch. 1) Check switch, replace if defective.

2) Defective power cord or wiring. 2) Check and replace if defective.

3) Defective motor. 3) Have motor checked by an authorized service center.

4) Blown fuse or tripped circuit breaker at the wall panel. 4) Replace fuse or reset circuit breaker. If this does not correct the

problem, have the sander checked byan authorized service center.

5) Power cord not plugged in properly or damaged. 5) Plug in power cord properly or replace power cord if damaged.

PROBLEM: Machine bogs down and runs slow.

POSSIBLE CAUSE POSSIBLE SOLUTION

1) Defective capacitor or switch. 1) Have machine checked by an authorized service center.

2) Circuit may be overloaded with more than one appliance. 2) Plug floor machine into a dedicated power outlet. If the problem

still exists there could be a short. Have the floor machine checked by an authorized service center.

3) Low line voltage in building. 3) If wiring is old in the building have the power company check voltage.

PROBLEM: Motor runs, driver will not rotate.

POSSIBLE CAUSE POSSIBLE SOLUTION

1) Belt is broken. 1) Replace belt.

PROBLEM: Noisy machine or vibration.

CAUSE POSSIBLE SOLUTION

1) Defective motor. 1) Contact the manufacturer or authorized service center.

2) Attachment is not level or securely attached. 2) Level attachment and make sure all fasteners are secure.

WARRANTY INFORMATION

22))

This machine is warrantied against defects in material and workmanship for 1 year, except for normal wear items listed below, from the date of delivery to the original purchaser. The warranty period is subject to the conditions below:

Normal W

arranted Up to 90 Days:

Normal wear items will be warranted from manufacturing defects from date of purchase including but not limited to the following items:

ear Item

Accessories; Attachments; Belts; Bearings; Casters; Electric Cords; Finishes; Filters; Pad Holder; Switches; and the like.

Warranty is null and void for the following:

1) Damage, defects, malfunctions or other

failures caused by not using the electric current indicated on the spec plate.

Damage or defect caused by accident;

misuse; neglect; abuse; fire; etc.

44))

Failure due to lack of proper maintenance

and care (including cleaning).

55))

Any unauthorized design alterations, adjustments and/or repairs performed on this machine.

66))

Use of parts not approved by the machines manufacturer will void all warranties.

77))

Damage in transit.

SSttaatteedd WWaarrrraannttiieess

This Warranty is in lieu of and excludes all other warranties expressed or implied. Any statutory implied warranties, including the warranty of merchantability or fitness for a particular purpose, are expressly excluded. We will not be liable for any other damage including but not limited to indirect or special consequential damages arising out of or

in connection with the furnishing, performance, use or inability to use the machine. This remedy shall be the exclusive remedy of the buyer. The warranty is limited to the warranty.

WWaarrrraannttyy CCllaaiimm PPrroocceedduurree

If a difficulty develops during the warranty period, contact the authorized distributor form whom the unit was purchased. The Warrantor may elect to require the return of the machine or components to validate the claim. any defective part to be returned must be properly packed and shipped freight prepaid to an Authorized Distributor/Service Center.

Note: Because this machine is intended for commercial and/or industrial use the warranty is limited and not applicable to persons purchasing or using this equipment for personal, family or household use in which case the 90 day rule applies.

PN 464325 Rev B - MTHC16EHR-1760 Floor Machine - Printed in USA 12/17/07

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