Ryobi HP1830M Operator's Manual page 15

THREE SPEED GEAR TRAIN
See Figure 11.
The hammer drill has a two-speed gear train that provides a
high speed of approximately 1,400/min and a low speed of
approximately 400/min (stated speeds are with the trigger
switch in the "Full-on" position).
Follow these steps to adjust the speed.
■ For super high speed : Slide the three-speed gear train
switch to "3."
■ For high speed : Slide the three-speed gear train switch
to "2."
■ For low speed : Slide the three-speed gear train switch
to "1."
Note: If you have difficulty changing from one gear
range to the other, turn the chuck by hand until the
gears engage.
CAUTION:
To prevent gear damage, always allow chuck to come to
a complete stop before changing the speed or the
direction of rotation.
KEYLESS CHUCK
See Figure 12.
A keyless chuck has been provided with your drill to allow for
easy installation and removal of bits. As the name implies,
you can hand tighten or release drill bits in the chuck jaws.
Grasp and hold the collar of the chuck with one hand. Rotate
the chuck body with your other hand. The arrows on the
chuck indicate which direction to rotate the chuck body in
order to GRIP (tighten) or RELEASE (unlock) the drill bit.
WARNING:
Do not hold the chuck body with one hand and use the
power of the drill to tighten chuck jaws on drill bits. Chuck
body could slip in your hand or your hand could slip and
come in contact with rotating drill bit. This could cause
an accident resulting in serious personal injury.
OPERATION
SUPER-HI
SPEED
DRILL BIT
CHUCK
JAWS
Page 15
THREE-SPEED
GEAR TRAIN (LO-HI-SUPER-HI)
HI
SPEED
2
3
CHUCK COLLAR
UNLOCK
(RELEASE)
GRIP
(TIGHTEN)
LO
SPEED
1
Fig. 11
CHUCK
BODY
Fig.12