MAC TOOLS MCM849, Original Instructions Manual

12

English

Optional Accessories

WARNING:

 Since accessories, other than those offered 

by Mac Tools, have not been tested with this product, use 
of such accessories with this tool could be hazardous. To 
reduce the risk of injury, only Mac Tools recommended 
accessories should be used with this product.

Consult your dealer for further information on the 
appropriate accessories.

Cleaning

WARNING:

 Blow dirt and dust out of the main housing 

with dry air as often as dirt is seen collecting in and around 
the air vents. Wear approved eye protection and approved 
dust mask when performing this procedure.

WARNING:

 Never use solvents or other harsh chemicals 

for cleaning the non-metallic parts of the tool. These 
chemicals may weaken the materials used in these parts. 
Use a cloth dampened only with water and mild soap. 
Never let any liquid get inside the tool; never immerse any 
part of the tool into a liquid.

Lubrication

Your power tool requires no additional lubrication.

MAINTENANCE

Your power tool has been designed to operate over a long 
period of time with a minimum of maintenance. Continuous 
satisfactory operation depends upon proper tool care and 
regular cleaning.

WARNING:To reduce the risk of serious personal 
injury, turn tool off and disconnect battery pack 
before making any adjustments or removing/
installing attachments or accessories. 

An accidental 

start-up can cause injury.

The charger and battery pack are not serviceable.

shown in Figure A. Hold the lock button in as you gently release 
the trigger switch.
To turn the tool off from a locked-on position, squeeze and 
release the trigger switch once.

nOTE:

 The trigger switch can only be locked on with the tool 

running at the maximum RPM designated by the speed control 
wheel 

 3 

.

Speed Control Wheel (Fig. A)

The maximum speed of your tool can be changed by rotating 
the speed control wheel 

 3 

 to the desired setting. For added 

versatility, the trigger switch 

 5 

 may be locked in its full on 

position and tool speed changed by means of the speed control 
wheel alone.
The speed control wheel can be set for any speed between 
800 and 2200 RPM and the variable speed trigger switch will 
then control tool speed from zero to the wheel setting. For 
example: A control wheel setting of 2200 RPM will allow the 
variable speed trigger switch to operate the tool between 
zero and 2200 RPM, depending on how far the trigger switch 
is depressed.

Electronic Speed Control

The electronic speed control feature functions whenever the 
trigger switch is fully depressed and the tool is running at the 
selected speed determined by the setting of the control wheel.
As you load the tool by pushing it down on the work surface, 
the tool will compensate for the loading and maintain the 
selected speed. If the speed selected by the control wheel is 
2200 RPM, the tool will maintain 2200 RPM, as it is loaded.
•  The electronic speed control operates only when the trigger 

switch 

 5 

 is fully depressed.

•  The effect of electronic speed control is much easier to 

observe at lower speed settings (1400 RPM and below), than 
at high speeds.

A conventional polisher running at a typical no-load speed of 
2200 RPM slows down to about 1800 RPM under a polishing 
load. Your polisher will continue to run at 2200 RPM (or any 
speed you select with the control wheel) as a load is applied. 
If the speed is too great, slow the tool down with either the 
trigger switch or the control wheel.

Polishing (Fig. E)

1.  Without turning the tool on, grasp the handles of the tool 

and pick it up.

2.  Keep the tool away from your body and depress the 

trigger switch.

3.  Make sure you have a firm grip on the handles.
4.  Move the tool evenly over the surface of the workpiece, 

without applying pressure.

5.  Switch off the machine before taking the tool from 

the surface.

6.  Check your work at short intervals.

The auxiliary handle 

 7 

 can be easily changed to either side of 

the tool for left-handed or right-handed operation.

Use utmost care when power polishing around or over sharp 
objects and contours. It is very important to use the correct 
pressure while polishing various sections of an automobile body. 
For example, light pressure should be applied when polishing 
over sharp edges of body panels, or over edges of the rain gutter 
along the top.

WARNING: 

High-speed rubbing action of the polishing 

bonnet upon the workpiece surface can build a static 
charge on the metal portions of this tool resulting in a 
static shock when touched.