Operation - Hilti SFH 151-A Operating Instructions Manual

6.2.1 Charging a new battery for the first time
A new battery must be charged correctly for the
first time before use. This will ensure that the cells
form correctly. Incorrect initial charging may have a
permanent, negative effect on battery capacity. Please
en
refer to the applicable battery charger's operating
instructions for information about initial charging.
6.2.2 Charging a previously used battery
CAUTION
Use only the Hilti chargers listed under "Insert
tools, accessories".
Ensure that the outer surfaces of the battery are
clean and dry before inserting it in the corresponding
charger.
Read the operating instructions for the charger for
further information about the charging procedure.

7. Operation

7.1 Setting forward or reverse rotation 3
NOTE
The forward / reverse switch is used to select the
direction of rotation of the drive spindle. An interlock
prevents switching while the motor is running. The
control switch is locked when the forward / reverse
switch is in the middle position. Push the forward /
reverse switch to the right (power tool held in working
direction) to select forward rotation. Push the forward
/ reverse switch to the left (power tool held in working
direction) to select reverse rotation.
7.2 Speed selection
7.2.1 Speed selection using the 2-speed switch
(SF 151-A) 4
NOTE
The mechanical 2-speed gear switch can be used to
select the speed range required. Speeds with fully-
charged battery: 1st gear: 0-390 r.p.m. or 2nd gear:
0 1455 r.p.m.
8
Printed: 07.07.2013 | Doc-Nr: PUB / 5070642 / 000 / 00
6.2.2.1 Recharging NiCd and NiMH batteries
NiCd and NiMH batteries should be allowed to reach
full charge each time they are charged.
6.3 Fitting the battery to the power tool
CAUTION
Before fitting the battery, check that the power tool
is switched off and that the safety lock is engaged
(forward/reverse switch in the middle position). Use
only the Hilti batteries approved for use with this
power tool.
1. Push the battery into the power tool from below
until it is heard to engage with a click.
2. CAUTIONA falling battery may present a risk of
injury to yourself or others.
Check that the battery is seated securely in the
power tool.
6.4 Removing the battery 2
1. Press both battery release buttons.
2. Pull the battery downwards out of the power tool.
7.2.2 Speed selection using the 3-speed switch
(SFH 151-A) 5
NOTE
The mechanical 3-speed gear switch can be used to
select the speed range required. Speeds with fully-
charged battery: 1st gear: 0-370 r.p.m., 2nd gear:
0-1380 r.p.m., 3rd gear: 0 2000 r.p.m.
7.3 Switching on / off
CAUTION
To avoid damage to the power tool, the switch must
be released (switched off) if the motor is stalled for
more than 2-3 seconds. After stalling, the power
tool must be allowed to run for 2 minutes under no
load.
The speed of the power tool can be controlled
smoothly (increased from zero to maximum) by
pressing the control switch gradually.