ASSEMBLY
To reduce the risk of injury, always
WARNING
unplug tool before changing or
removing accessories. Only use accessories
specifically recommended for this tool. Others
may be hazardous.
Adjusting the Spade Side Handle
(Cat. No. 5337-20, 5339-20 only)
The spade side handle is provided on demolition
hammers only. Do not use the spade side handle
on Rotary Hammers.
1. Slightly loosen the spade side handle by turning
the spade side handle adjusting knob counter-
clockwise.
2. Rotate the spade side handle to the desired posi-
tion. The handle can be moved to the left or right
of the tool, as well as forward or backward.
3. Securely tighten the spade side handle adjusting
knob.
Adjusting the Straight Side Handle
Screw the straight side handle into one of three posi-
tions (top, left side, or right side). Tighten securely.
To reduce the risk of injury when
WARNING
hammering with rotation, always
use the straight side handle when using this tool.
Always brace or hold securely.
To reduce the risk of injury when hammering
with or without rotation, wear safety goggles or
glasses with side shields.
Installing Bits and Chisels
Spline shank
Cat. No. 5340-20 only
Round hex shank
Cat. No. 5340-20 only
Hex shank
Cat. No. 5337-20 only
NOTE: To reduce the risk of damage to the bit lock,
do not use round hex shank bits in the 5337-20. Only
use hex shank bits in this tool.
1. Clean and grease the bit or chisel shank.
2. Pull out the bit lock and rotate it 180°.
3. Insert the bit or chisel into the nose of the tool.
NOTE: When using hex (on cat. no. 5337-20) or
hex/round (on cat. no. 5340-20) bits or chisels, the
notch in the shank must face toward the bottom of
the nosepiece of the tool.
4. Lock the bit or chisel by pulling out the bit lock and
rotating it 180°.
5. Pull on the bit or chisel to verify that it is locked
into place.
6. To remove, rotate the bit lock 180° and remove
the bit or chisel.
NOTE: Use caution when handling hot bits and
chisels.
SDS Max shank
Cat. No. 5339-20,
5342-20
1. Clean and grease the bit or chisel shank.
2. Insert the bit or chisel into the nose of the tool.
3. Rotate the bit or chisel slowly until it aligns with
the locking mechanism.
4. Push the bit or chisel into the tool until it locks.
5. Pull on the bit or chisel to verify that it is locked
into place.
6. To remove, pull the bit release collar toward the
rear of the tool and remove the bit or chisel.
To reduce the risk of injury, use
WARNING
only specifically recommended
MILWAUKEE hammer chisels. Others may dam-
age tool.
Round hex shank
(Cat. No. 5340-20)
Hex shank
(Cat. No. 5337-20)
Installing Hammer Chisels
Always clean and grease the chisel shank before
inserting the chisel into the tool. Inspect the shank
to make sure it is not "mushroomed", as described
in "Maintaining Hammer Chisels". Always make
sure that the chisel is in good working condition
before use.
OPERATION
Electronic Feedback Control Circuit
These hammers have an Electronic Feedback Con-
trol Circuit (EFCC) which helps improve the operation
and life of the tool.
Feedback Control
The electronic speed control circuit allows the tool to
maintain constant speed and torque between no-load
and load conditions.
The Soft-Start feature reduces the amount of torque
reaction to the tool and the user. This feature gradu-
ally increases the motor speed up from zero to the
speed set by the speed control dial.
To reduce the risk of injury, always
WARNING
unplug tool before attaching or
removing accessories or making adjustments.
Use only specifically recommended accessories.
Others may be hazardous.
To reduce the risk of injury, wear safety goggles
or glasses with side shields.
To reduce the risk of injury, wear a dust mask or
use an OSHA compliant dust extraction solution
when working in dusty situations.
To reduce the risk of injury, keep hands and cord
away from the bit and all moving parts.
To reduce the risk of injury, always use a side
handle when using this tool. Always brace or
hold securely.
Selecting Speed
The speed control dial on these hammers allows
the user to adjust the rotating speed (RPM) and the
impact rate (BPM) of the tool.
5
Soft Start