12
The Effects of Steel in Coring
• To self-sharpen, diamond-impregnated core bits
require interaction with an abrasive material. This
abrasive material wears away the metal composi-
tion in the segment's matrix. As this is done, sharp
diamonds are exposed and the grinding action cre-
ated by the diamonds continues.
• Embedded metal (rebar) is not an abrasive mate-
rial. It does not provide the degree of abrasiveness
required for matrix wear to occur and expose sharp
diamonds embedded in the segment's matrix.
• A high degree of exposure to embedded metal by
the bit's segments creates glazing. Glazing prevents
the bit from cutting and coring.
MAINTENANCE
WARNING
To reduce the risk of injury, always
unplug the tool before performing
any maintenance. Never disassemble the tool.
Contact a MILWAUKEE service facility for ALL
repairs.
Maintaining Tools
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.
Lubricating Rack and Pinion
Maintain a light coat of MILWAUKEE Type "E" Grease
on the rack and pinion gears to reduce friction and
wear.
Lubricating the Spindle for Dymodrills
with a Shear Pin
Before each use, clean and lubricate the spindle or
spindle sleeve with MILWAUKEE Type "E" Grease
to prevent the spindle from seizing during coring.
1. To maintain the spindle on shear pin models, re
-
move the retaining ring with a screwdriver. Then
remove the spindle sleeve.
2. Remove dust and debris from the inside and out
-
side diameter of the spindle and spindle sleeve
and from the water hole in the spindle. Place a
light coating of MILWAUKEE Type "E" grease on
the spindle.
3. Replace the spindle sleeve onto the spindle.
Make sure the spindle sleeve rotates freely on the
spindle. Then replace the retaining ring.
Replacing Vacuum Pad Gaskets
For Cat. No. 4115, 4125 & 4130 only.
Through normal use, the rubber gaskets on the
underside of the vacuum pads can become worn,
requiring replacement. If replacement is required,
take the pad to an authorized service center or
replace the gasket as follows:
1. Remove the old gasket and thoroughly remove
the old glue from the groove.
2. Squeeze a continuous bead of rubber cement (Cat.
No. 44-22-0060) in the entire bottom of the groove.
3. Immediately place a new gasket (Cat. No. 43-44-
0570) in the groove and press firmly in place.
4. Turn the pad over and place the gasket side on a
smooth flat surface and apply pressure to all edges
of the pad.
5. Allow cement to dry for 24 hours before using.
For Cat. No. 4120 only.
With normal use, the rubber gasket on the underside
of the base can become worn, requiring replacement.
If replacement is required, take the base to an autho-
rized service center or replace the gasket as follows:
1. Remove the motor and bit.
2. Tip the Dymorig on its back so that the wheels
point down.
3. Remove the old gasket.
4. Squeeze a continuous bead of rubber cement (Cat.
No. 44-22-0060) in the entire bottom of the groove.
5. Place the new gasket (Cat. No. 43-44-0605) into
the groove making sure it is pushed in completely.
6. Stand the Dymorig upright again.
7. Reinstall the motor and bit.
Cleaning the Filter on the Vacuum Pump
Periodically clean the filter felts to keep the vacuum
pump operating efficiently. To clean the filter felts,
remove the plastic jar and remove the felts from the
plastic tube. Remove dust and debris from the felts
and clean the plastic jar. Then replace the felts on
the plastic tube and position the jar.
WARNING
To reduce the risk of personal in-
jury, electric shock and damage,
never immerse your tool in liquid or allow a liquid
to flow inside it.
Cleaning
Clean dust and debris from vents. Keep handles
clean, dry and free of oil or grease. Use only mild
soap and a damp cloth to clean, since certain clean-
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.
Repairs
For repairs, return the tool to the nearest service
center.
ACCESSORIES
WARNING
Use only recommended accesso-
ries. Others may be hazardous.
For a complete listing of accessories, go online to
www.milwaukeetool.com or contact a distributor.
SERVICE - UNITED STATES
1-800-SAWDUST
(1.800.729.3878)
Monday-Friday, 7:00 AM - 6:30 PM CST
or visit
www.milwaukeetool.com
Contact Corporate After Sales Service Technical
Support with technical, service/repair, or warranty
questions.
Email: [email protected]
Become a Heavy Duty Club Member at
www.milwaukeetool.com to receive important
notifications regarding your tool purchases.
SERVICE - CANADA
Milwaukee Tool (Canada) Ltd
1.800.268.4015
Monday-Friday, 7:00 AM - 4:30 PM CST
or visit
www.milwaukeetool.ca
