Troubleshooting; Maintenance - Milwaukee 6140-30 Operator's Manual

Sander/grinder

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Operator's manual (22 pages)

Operator's manual (22 pages)

Table Of Contents

Table of Contents

Available languages

Guard

Test wheel for balance and loose or damaged wires

by letting it spin for one minute before applying it to

the workpiece. During this time, no one should stand

in front of or in line with it.

Control pressure and surface contact between

wheel and workpiece. Too much pressure causes

over-bending of wires and heat build-up causing

premature wire breaking, rapid dulling and reduced

brush life. Instead of more pressure, try a wire wheel

with more aggressive cutting action (increased wire

size, decreased wire length or different brush type

(knot type vs. crimped wire type).

Using Sanding Discs

Hold tool at 5° to 15° angle to ensure proper sanding

pressure and control. Too great an angle will result

in too much pressure and could cause excessive

wear to the disc and workpiece. Too small an angle

will reduce control.

Use long, sweeping, side to side strokes, advancing

forward to produce the desired finish.

For best result use only this portion of disc

Cross Sanding - When finishing a surface that

has been prepared by a coarse disc or wheel, sand

at right angles to the strokes made by the coarser

disc. Finishing marks left from previous sanding are

easily seen and removed for a uniform finish. Failure

to cross sand when changing from a coarse disc to

a finishing disc may result in deep scratches and

circular marks.

Removing Welds or Hammer Marks - When remov-

ing welds or hammer marks, limit coarse sanding to

the immediate area. Use successively finer grits to

smooth surface.

Finishing Metal - Constantly move across the sur-

Wire

face. Work faster on curved surfaces where contact

Wheel

areas are smaller and pressure is greater. Flat areas

Brush

may appear at the end of the stroke when pressure

is too heavy. Ease up on pressure at end of each

stroke and when reversing strokes.

Deep scratches and circular marks can result from:

• Using too coarse a grit

• Using a partially glazed disc

• Dirt or loose metal on the workpiece

Wire Cup

• Failure to sand across the grain when changing from

Brush

coarse to finishing discs

• Failure to use closed coated discs to reduce the

problem of grains working loose and scratching the

workpiece

Bluish discoloration of metal surface indicates:

• Excessive heat caused by circular motion in a small area

• Excessive pressure

• Use of worn out or glazed discs

any maintenance. Never disassemble the tool.

Contact a MILWAUKEE service facility for ALL

repairs.

Keep your tool in good repair by adopting a regular

maintenance program. Inspect your tool for issues

such as undue noise, misalignment or binding of

moving parts, breakage of parts, or any other condi-

tion that may affect the tool operation. Return the tool

to a MILWAUKEE service facility for repair. After six

months to one year, depending on use, return the

tool to a MILWAUKEE service facility for inspection.

never immerse your tool in liquid or allow a liquid

to flow inside it.

Clean dust and debris from vents. Keep handles

clean, dry and free of oil or grease. Use only mild

Hold at a

soap and a damp cloth to clean, since certain clean-

5° to 15° angle

ing agents and solvents are harmful to plastics and

other insulated parts. Some of these include gasoline,

turpentine, lacquer thinner, paint thinner, chlorinated

cleaning solvents, ammonia and household deter-

gents containing ammonia. Never use flammable or

combustible solvents around tools.

For repairs, return the tool to the nearest service center.

For a complete listing of accessories, go online to

www.milwaukeetool.com or contact a distributor.