Mastercraft Mthc-20jstd Owner's Manual

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Page 1

SAFETY & MAINTENANCE

MANUAL W/PARTS LIST

READ & FOLLOW ALL INSTRUCTIONS,

MTHC-20J-230

ULTI-PURPOSE

FLOOR SURFACING

MACHINE

AAddddrreessss

Parts and Service Center

777 South Street

Newburgh NY 12550-0606

PPhhoonnee

845/565/6623

FFaaxx

845/565/8894

ARNINGS & CAUTIONS

BEFORE USING THIS

FLOOR SURFACING MACHINE

This floor surfacing 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, the units are again inspected for assurance of flawless operation.

This floor surfacing 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 the delivery.

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

Treat this floor surfacing 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.

PPLLEEAASSEE RREEAADD CCAARREEFFUULLLLYY!!

TThhiiss uunniitt iiss iinntteennddeedd ffoorr ccoommmmeerrcciiaall uussee..

PLEASE READ

CAREFULLY

BEFORE

OPERATING

SAVE THESE INSTRUCTIONS

AAGGEE

PN 499676 Rev A - MTHC-20J-230 - Printed in USA 12/18/07

Page 2

IMPORTANT

AARRNNIINNGG

SAFETY INSTRUCTIONS

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

Read all instructions before using this floor machine.

11)) DDOO NNOOTT plugged in when not in use. Unplug from the outlet when not in use and/or before servicing.

22))

Electric shock could occur if exposed to rain.

Store indoors.

33))

This is

when used around or near children.

44))

Use only as described in this manual. Use only the manufacturer's recommended attachments.

55)) DDOO NNOOTT 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.

66)) DDOO NNOOTT cord as a handle, close a door on cord, or pull cord around sharp edges or corners. run floor machine over the cord. Keep cord away from heated surfaces.

77)) DDOO NNOOTT hands.

88)) DDOO NNOOTT

leave the floor surfacing machine

NNOOTT

a toy. Close attention is necessary

use with damaged cord plug. If the

pull or carry by cord, use power

DDOO NNOOTT

handle the plug or operate with wet

put any object into motor openings.

99)) DDOO NNOOTT unplug, grasp plug, not the power cord.

100))

Keep hair, loose clothing, fingers and all

parts of body away from moving parts.

1111)) DDOO NNOOTT the manufacturer’s filters in place.

1122)) DDOO NNOOTT oxygen are used.

1133)) DDOO NNOOTT bustible liquids such as gasoline or use in areas where they may be present.

1144)) DDOO NNOOTT

1155))

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

1166))

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

1177)) DDOO NNOOTT when sander is not in use, this is a fire hazard.

This floor machine must be connected to a properly grounded outlet only.

unplug by pulling on cord. To

use an optional vacuum without

operate where anesthetics and

use around flammable or com-

use an extension cord.

to leave sawdust in the filter bag

GROUNDING INSTRUCTION

AANNGGEERR

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

This floor surfacing machine 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

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.

NNOOTTEE::

In Canada, the use of a temporary adaptor is not permitted by

the Canadian Electrical Code.

AAGGEE

cord having an equipment-grounded plug. The plug must be inserted into an appropriate outlet that is properly installed and grounded in accordance with all local codes and ordinances

AARRNNIINNGG

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AAUUTTIIOONN

ATTACHMENT

When installing or changing the accessories, turn OFF the machine

and disconnect the power cord from the electrical outlet.

BBeeffoorree IInnssttaallllaattiioonn oorr CChhaannggiinngg ooff AAttttaacchhmmeennttss::

1) Unplug the machine 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.

NNoottee::

It is recommended that a towel or pad is

placed under the machine to protect the floor.

CChhaannggiinngg aanndd IInnssttaallllaattiioonn tthhee AAttttaacchhmmeennttss::

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

2) Using both hands, reach beneath the bottom side 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.

INSTALLATION &

CHANGING

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.

AAUUTTIIOONN

DO NOT attempt to operate this unit if the

machine is not fully assembled.

When servicing or replacing an accessories turn OFF the

machine and disconnect from the power source.

Prior to operating the machine,

tilt machine back on transport wheels, turn ON the machine

and carefully lower the machine onto the working surface.

11))

Clear the floor of any materials or objects.

22))

Ensure handle is in the storage position (straight up) and locked in place with the quick release pin.

33))

Tilt the machine back until the handle is laying on the floor and the three heads are fully exposed.

44))

Select the accessory set required for the

job.

55))

Snap the accessory set onto the four metal pins protruding from each of the three heads.

66))

To replace, pull off the current accessory

set and replace with the new accessory set.

77))

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

88))

Shift handle to the operating position and lock in place with the quick release pin.

AAGGEE

FLOOR SURFACING

MACHINE

OPERATING

INSTRUCTIONS

Page 4

MTHC-20J-230

ANDLE/BASE

H ASSEMBLY DRAWING &

ARTS LIST

______________________________________

RReeff PPaarrtt DDeessccrriippttiioonn QQttyy PPaarrtt NNoo NNoo

______________________________________

1 Switch Box Plate 1 493481 2 Rubber Handle Grip 2 490180 3 Machine Switch 1 493074 4 Strain Relief Assembly 1 425427 5 50 Ft Power Cord w/Twist Lock 1 493163 6 Handle Assembly 1 498807 7 Quick Release Pin w/Cable 1 456896 8 Wire Retainer 1 456888

9 Motor Cord without Plug 1 490229 10 .37-16 X 11 Bronze Bushing 2 491055 12 Wheel Base Assembly 1 493708 13 6” X 2” Wheel 2 490903 14 Palnut 2 490881

______________________________________

” Shoulder Bolt 2 491063

AAGGEE

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MTHC-20J-230

UTERBOWL ASSEMBLY

DRAWING

& PARTS L

IST

____________________________________

RReeff PPaarrtt DDeessccrriippttiioonn QQttyy PPaarrtt NNoo NNoo

____________________________________

1 3 HP Motor, 3450 RPM’s 1 491845 2 Pigtail 1 495786 3 Bowl Handle 2 490385 4 5 .38-16 X 1” Bolt 4 368830 6 20” Outer Bowl Assembly 1 496464 7 13/4” External Snap Ring 1 491292 8 Rubber Dust Skirt 1 491926

9 Velcro Strip 1 492019 10 28# Weight (Optional) 1 492442 11 Nyloc Nut 3 380784 12 Weight Knob 3 491632 13 14 Felt Gasket 1 493066 15 .37 Lockwasher 4 368849

____________________________________

AAGGEE

-20 X

” Screw 4 457310

-20 X .75” Screw 3 342831

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MTHC-20J-230

NNERBOWL

I ASSEMBLY DRAWING & PARTS LIST

___________________________________

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 20” Inner Bowl 1 491810 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 491888 24 Belt 25 48 High Tooth Pulley 1 490512 26 48 Middle Tooth Pulley 1 490490 27 48 Low Tooth Pulley 1 490415

(240-L050) 3 491918

___________________________________

AAGGEE

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AARRNNIINNGG

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.

VACUUM

OPERATING

INSTRUCTION

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 specific manufacturer’s safety & operation instructions.

11))

Unplug the motor power cord from the handle.

22))

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

” hose barb on the outer bowl of the

1 floor machine.

BELT CHANGING INSTRUCTIONS

33))

Turn sander chassis upside down on a

table resting on the motor cover.

44))

Remove pads/attachments (see page 3

for instructions.)

55))

Remove the 9 Flat head screws and

beveled washers from cover plate.

66))

Remove the cover plate from inner bowl.

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

77))

Vacuum up the dust and debris from inner

bowl.

88))

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

99))

Roll new belt or belts back on the pulley.

1100))

Reassemble the machine reversing the

above steps.

AAUUTTIIOONN

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.

11))

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.

11))

Unplug the machine.

22))

After each use, wipe off machine with a clean cloth.

33))

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

22)) DDOO NNOOTT attachments while the machine is running or connected to a power source.

33)) DDOO NNOOTT or in areas where liquids could enter the electrical components of the machine.

55))

Check for loose parts and fasteners.

66))

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.

attempt to service or replace

operate this machine in the rain

GENERAL

SAFETY

PRECAUTIONS

44))

Keep the power cord away from the

revolving heads to avoid damage.

55))

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

MACHINE

MAINTENANCE

AAGGEE

Page 8

TROUBLE SHOOTING GUIDE

PROBLEM: Motor will not run.

Possible Cause Possible Solution

11))

Defective switch.

22))

Defective power cord or wiring.

33))

Defective motor.

44))

Blown fuse or tripped circuit breaker at wall panel.

55))

Power cord not plugged in properly or damaged.

PROBLEM: Machine bogs down and runs slow.

Possible Cause Possible Solution

11))

Defective capacitor or switch.

22))

Circuit may be overloaded with more than one appliance.

33))

Low line voltage in building.

ny.

PROBLEM: Motor runs, driver will not rotate.

Possible Cause Possible Solution

11))

Belts are broken.

11))

Check switch, replace if defective.

22))

Check and replace if defective.

33))

Have motor checked by an authorized service center.

44))

Replace fuse or reset circuit breaker. If this doesn't correct the

problem, have the sander checked by an authorized service center.

55))

Plug in power cord properly or replace power cord if damaged.

11))

Have machine checked by an authorized service center.

22))

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.

33))

If wiring is old in the building have voltage checked by the power compa-

11))

Contact the manufacturer or authorized service center.

PROBLEM: Noisy machine or vibration.

Possible Cause Possible Solution

11))

Defective motor.

22))

Attachment is not level or securely attached.

11))

Contact the manufacturer or authorized service center.

22))

Level attachment and make sure all fasteners are secure.

WARRANTY

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 Wear Item Warranted 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:

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.

2) Damage or defect caused by accident;

misuse; neglect; abuse; fire; etc.

4) Failure due to lack of proper maintenance and care (including cleaning).

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

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

7) Damage in transit.

Stated Warranties

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 spe

cial 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.

Warranty Claim Procedure

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 pre-paid 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 499676 Rev A - MTHC-20J-230 - Printed in USA 12/18/07

AAGGEE