TOUGH-WORKS TLGS625, Instruction Manual

14

TLGS625

MAINTEN

ANCE

Before mounting a new grinding wheel, it must 

be inspected. DO NOT assume that a wheel

is in sound condition because it is new. Dam-

age can occur during shipping, with age or 

exposure to moisture.

Visually inspect the wheel. Look for any cr-

acks, chips, nicks or dents in the wheel’s 

surface. DO NOT use the wheel if you see any

of these, Perform a Ring Test. This test will  

give you an indication of any internal damage 

that may not be obvious during a visual inspection.
To perform a Ring Test:

1.  Make sure the wheel that you test is clean 

     and dry; otherwise, you may get false results.
2.  Balance the wheel with your finger in the 

     hole if size permits, If this is not possible, 

     hang the wheel in the air with a piece of 

     cord or string looped through the hole in 

     the centert.

WHEEL INSPECTION

3.  At the spots shown in Figure 11, gently 

     tap the wheel with a light non-metallic 

     device such asthe handle of a screwdriver 

     or a wooden mallet.

4.  An undamaged wheel will emit a clear me-

     tallic ring or "ping" sound in each of these 

     spots. A damaged wheel will respond with  

     a dull thud that has no clear tone.

5.  DO NOT use it if you determine from the

     ring test that the wheel is damaged. 

Figure 11

REPLACING WHEELS

The wheel guard assembly must be re-

moved in order to mount or dismount a 

grinding wheel.
To remove/mount a wheel:

1. Disconnect the grinder from the power 

    supply.

2. Remove the three Phillips head screws 

    and nuts that go through the outer guard.

    Take off the outer guard and the rim 

    guard.

3. Use a wrench on the nut that holds the 

    wheel on the arbor. Hold the wheel to 

    prevent it fromturning with your other 

    hand. The grinding wheel arbor has a 

    left-handed thread. Loosen the nut by

    turning it clockwise.

4. Remove the outer wheel flange and p-

     aper disc. Pull the wheel free from the 

    arbor. There will also be a paper disc 

    and a wheel flange on the back side of 

    the wheel which should also be removed.

5. Mount the new wheel in the reverse o-

     rder or as shown in Figure 12. Always 

    make certain there is are paper or fiber

    discs between the wheel flanges and 

    the wheel itself. Tighten the nut snugly 

    but DO NOT over-tighten. Over-tightening 

    can crack the wheel.

6. Re-install the guards and shields.

7. Run a new wheel for at least one minute

     while standing clear of the line of rota-

    tion. If a wheel does have defects it will 

    generally fail as soon as it gets up to 

    full speed.

The hazards of using a damaged wheel 

include flying chunks of sharp abrasive

material that could cause serious injury 

or death. Inspect every grinding wheel 

before it is mounted and DO NOT use a 

damaged grinding wheel!

WARNING

!