ASSEMBLY
Recharge only with the charger
WARNING
specified for the battery. For spe-
cific charging instructions, read the operator's
manual supplied with your charger and battery.
Removing/Inserting the Battery
To remove the battery, push in the release buttons
and pull the battery pack away from the tool.
Always lock the trigger or remove
WARNING
the battery pack any time the tool
is not in use.
To insert the battery, slide the pack into the body
of the tool. Make sure it latches securely into place.
Only use accessories specifically
WARNING
recommended for this tool. Others
may be hazardous.
Use only sockets and other accessories specifi-
cally designed for use on impact wrenches and
drivers. Other sockets and accessories might
shatter or break causing injury.
Attaching/Removing Accessories
These impact drivers are intended for use with drill
and driver bits.
To attach an accessory, pull out the ring (1) and press
the shank into the hex drive chuck (2).
To remove the accessory, pull out the ring (1) and
remove the accessory (2). Release the ring.
Insert
Remove
2
1
OPERATION
To reduce the risk of injury, always
WARNING
wear proper eye protection marked
to comply with ANSI Z87.1.
When working in dusty situations, wear appro-
priate respiratory protection or use an OSHA
compliant dust extraction solution.
Using the Control Switch
The control switch may be set to three positions:
forward, reverse and lock. Due to a lockout mecha-
nism, the control switch can only be adjusted when
the ON/OFF switch is not pressed. Always allow the
motor to come to a complete stop before using the
control switch.
For forward (clockwise) rotation, push in the control
switch
from the right side of the tool. Check the
direction of rotation before use.
For reverse (counterclockwise) rotation, push in the
control switch
from the left side of the tool. Check
direction of rotation before use.
To lock the trigger, push the control switch to the
center position. The trigger will not work while the
control switch is in the center locked position. Always
lock the trigger or remove the battery pack before
performing maintenance, changing accessories,
storing the tool and any time the tool is not in use.
Starting, Stopping and Controlling Speed
1. To start the tool, grasp the handle firmly and pull
the trigger.
NOTE: An LED is turned on when the trigger is
2
pulled and will go off shortly after the trigger is
released.
2. To vary the speed, increase or decrease the pres-
1
sure on the trigger. The further the trigger is pulled,
the greater the speed.
3. To stop the tool, release the trigger. Ensure the
tool has come to a complete stop before laying
the tool down.
Speed Control Switch
(3651-20 only)
Allow the tool to come to a
Speed
complete stop before chang-
control
ing speeds. Slide the selec-
switch
tor switch from side to side
to select the maximum
Speed
speed. Select "1" for the
indicator
lowest speed. Select "3" for
the highest speed.
3651-20
1
2
RPM
0 - 1250
0 - 2400
IPM
0 - 2500
0 - 4700
4
Impacting Techniques
The longer a bolt, screw, or nut is impacted, the
tighter it will become. To help prevent dama ging the
fasteners or workpieces, avoid excessive impacting.
Be particularly careful when impacting smaller fas-
teners because they require less impacting to reach
optimum torque.
Practice with various fasteners, noting the length of
time required to reach the desired torque. Check the
tightness with a hand-torque wrench. If the fasteners
are too tight, reduce the impacting time. If they are
not tight enough, increase the impacting time.
Oil, dirt, rust or other matter on the threads or under the
head of the fastener affects the degree of tightness.
The torque required to loosen a fastener averages
75% to 80% of the tightening torque, depending on
the condition of the contacting surfaces.
On light gasket jobs, run each fastener down to a
relatively light torque and use a hand torque wrench
for final tightening.
MAINTENANCE
To reduce the risk of injury, always
WARNING
unplug the charger and remove the
battery pack from the charger or tool before
performing any maintenance. Never disassemble
the tool, battery pack or charger. Contact a
MILWAUKEE service facility for ALL repairs.
Maintaining Tool
Keep your tool, battery pack and charger 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 condition that may affect the tool
operation. Return the tool, battery pack, and charger
to a MILWAUKEE service facility for repair. After six
months to one year, depending on use, return the
tool, battery pack and charger to a MILWAUKEE
service facility for inspection.
If the tool does not start or operate at full power with
a fully charged battery pack, clean the contacts on
the battery pack. If the tool still does not work prop-
erly, return the tool, charger and battery pack, to a
MILWAUKEE service facility for repairs.
To reduce the risk of personal in-
WARNING
jury and damage, never immerse
your tool, battery pack or charger in liquid or
allow a liquid to flow inside them.
Cleaning
Clean dust and debris from any vents. Keep tool
3
clean, dry and free of oil or grease. Use only mild
soap and a damp cloth to clean, since certain clean-
0 - 3600
ing agents and solvents are harmful to plastics and
other insulated parts. Some of these include gasoline,
0 - 4900
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, battery pack and charger
to the nearest authorized service center.
ACCESSORIES
Use only recommended accesso-
WARNING
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
www.milwaukeetool.com
or visit
Contact Corporate After Sales Service Technical
Support with technical, service/repair, or warranty
questions.
Email: metproductsupport@milwaukeetool.com
B e c o m e a H e a v y D u t y C l u b M e m b e r a t
www.milwaukeetool.com to receive important
notifications regarding your tool purchases.
SERVICE - CANADA
Milwaukee Tool (Canada) Ltd
1.877.948.2360
Monday-Friday, 7:00 AM - 4:30 PM CST
or visit www.milwaukeetool.ca
5