1
It is essential that the operating
instructions are read and under-
stand before the tool is operated
for the first time.
Always keep these operating
instructions together with the tool.
Ensure that the operating instruc-
tions are with the tool when it is
given to other persons.
ORIGINAL OPERATING INSTRUCTIONS
TE MD20 MSHA rotary hammer drill
1. General information
1.1 Indication of danger
-CAUTION-
This word is used to draw attention to a potentially dan-
gerous situation which could lead to minor personal injury
or damage to the equipment or other property.
1.2 Pictograms
Contents
Page
1. General information
1
2. General safety rules
2
3. Specific safety rules and symbols
3
4. Functional description
5
5. Assembly
5
6. Operation
7
7. Care and maintenance
7
8. Accessories
7
9. Troubleshooting
8
10. Disposal
9
11. Manufacturer's warranty – tool
s
9
Operating controls
햲
On / off switch
햳
Fault indicator (red LED)
햴
Ready and service indicator (green LED)
Component parts
햷
Rotary hammer drill
햸
Hammering mechanism
햹
Electronics
햺
Gearing section
햻
Grip
햽
Cord and explosion-
proof plug
햾
Water leg
햿
Connecting pin
These numbers refer to the corresponding illustra-
tions. The illustrations can be found on the fold-out cov-
er pages. Keep these pages open while studying the oper-
ating instructions.
In these operating instructions, the designation "the tool"
always refers to the TE MD20 MSHA rotary hammer drill.
If the tool is used in areas where there is risk of explo-
sion, the information printed on a grey background in
these operating instructions must be observed. No
changes or modifications may be made to the tool with-
out consent from the approval authority.
Location of identification data on the tool
The type designation and serial number can be found on
the type plate on the tool. Make a note of this data in your
operating instructions and always refer to it when mak-
ing an enquiry to your Hilti representative or service
department.
Type:
Serial no.:
Warning signs
General
warning
Warning:
electricity
Warning:
hot surface
Warning:
avoid hand
injuries
Obligation signs
Wear eye
protection
Wear ear
protection
Wear
protective
gloves
Wear safety
footwear
Wear a
safety
helmet
V
volts
Hz hertz
~
alternating current
A
amperes
Plug with approval for use in environments where there
is a risk of explosion as per 3.2
Tool versions: TE MD20 MSHA
Plug and GFCI (no explosion protection!)
Tool versions: TE MD20 GFCI
쎻
24
Plug
쎻
25
PRCD ground fault
circuit interrupter
헀
Water hose
헁
Water hose
protective sleeve
헂
Regulating valve
헃
Support base
헄
Carrying handle
헅
Connection end
헆
Drill bit
쎻
21
Drill steel
햵
Chuck
햶
Drill bit lock
쎻
26
TEST button
쎻
27
RESET button
쎻
28
Indicator lamp
Printed: 20.04.2017 | Doc-Nr: PUB / 5136192 / 000 / 00
Printed: 20.04.2017 | Doc-Nr: PUB / 5136192 / 000 / 01
