ASTRO ONYX 1894 User manual

1 YEAR LIMITED WARRANTY
1894
1/2" THOR
IMPACT WRENCH
• Astro Pneumatic Tool Co. warrants our products to the original user against defective material or workmanship for a
period of 1 year from the date of 1st use. Astro reserves the right to determine whether the product failed because of
defective material, workmanship or other causes and to charge back for missing parts. Astro Pneumatic Tool Co., at its
discretion, will repair products covered under this warranty free of charge. The original user is to return the product
(with the exceptions listed below) with the distributor’s name, address, adequate proof of date of purchase or a copy of
warranty card, and a short note explaining the problem. Failures caused by accident, alteration, or misuse are not
covered by this warranty.
• Astro Pneumatic Tool Co. or its authorized service representatives must perform all warranty repairs. Any repair to the
product by unauthorized service representatives voids this warranty. The rights under this warranty are limited to the
original user and may not be transferred to subsequent owners.
• This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability and fitness
for a particular purpose. Some states do not allow the exclusion of limitations of incidental or consequential damages
so the above limitations may not apply to you.
WARNING
Study, understand and follow all instructions provided with this product.
Read these instructions carefully before installing, operating, servicing or
repairing this tool. Keep these instructions in a safe accessible place.
PLEASE DO NOT RETURN ANY PRODUCT WITHOUT CALLING 1-800-221-9705 FOR INSTRUCTIONS
106

02
1/2" THOR Impact Wrench1894
INTENDED USE OF THE TOOL
The 1/2" THOR Impact wrench was designed as a maximum duty air impact wrench for use with high
quality impact rated sockets on large bolts and fasteners. Do not use this tool outside of the designed
intent. Never modify the tool for any other purpose or use.
BEFORE USE
Before use, check the parts diagram and part number listing on page 5-6 to make sure all parts are
included. If any parts are missing or damaged, please call your distributor.
SPECIFICATIONS:
PRODUCT INFORMATION
CAUTION: TO HELP PREVENT PERSONAL INJURY.
• Use of this product can expose you to chemicals including ethylene glycol, gasoline vapors and
engine exhaust, which are known to the State of California to cause cancer, birth defects, or
reproductive harm. For more information, visit www.P65Warnings.ca.gov. Always wear ANSI
approved safety equipment, safety glasses and clothing when using this product.
Study, understand, and follow all instructions provided with this product. Failure to read and follow
all warnings and operating instructions may result in damages and serious injury or death.
• Always wear ANSI approved goggles when using this product. (Users and Bystanders).
• Never use this tool for any application other than for which it was designed.
• Only use accessories designed for this tool.
• Never alter or modify this tool in any way.
• Improper operation and/or maintenance of the tool, modification of the tool, or use of the tool with
accessories not designed for it could result in serious injury or death.
• Always select the correct accessories of the correct size and design for the job that you are
attempting to perform.
• Always work in a clean, safe, well-lit, organized and adequately equipped area.
• Do not begin repairs without assurance that vehicle is in secure position, and will not move during repair.
• In order to reduce their exposure to such chemicals, users should always:
- work in well-ventilated areas.
WARNING
- wear appropriate safety equipment and clothes that are
specifically designed to filter out microscopic particles.
Max Torque:
Free Speed:
Weight:
Length:
Vibration (m/s ):
2
940 ft-lbs (1,274 N-m)
7000 rpm
4.94 lb ( 2.24 Kg )
6.7"/168 mm
5.12
6.5 cfm
86/97 dBA
3/8" NPT (1/4" NPT adapter included)
3/8" w/ HI-FLOW fittings
Air Consumption @ 90psi:
Sound Pressure/Power:
Air Inlet In.:
Minimum Hose Size:
• Patented oversized floating air motor and twin-hammer assembly put the weight over the user's hand
for balance, and allow for industry leading power at only 6.7" in length
• Rated 940 ft-lbs traditional Max Torque (compare to 1,600 ft-lbs nut-busting or bolt-breakaway)

• The tool shall not be used in potentially explosive atmospheres.
• Disconnect the air hose before changing or adjusting any inserted tools.
• Before using tool, please confirm all couplings and plugs are fixed securely. An air hose that is under
pressure may lash out when disconnected and could lead to serious injuries.
• Prevent loose clothes, long hair or any other personal accessories from coming close to moving
parts to reduce the risk of being caught, trapped or drawn into the rotating spindle.
• Excessive high air pressure that exceeds the maximum pressure may cause injuries to user.
• Exposure to strong vibration for extended time may cause harm to operator.
• Be aware of the rotation direction before starting the tool to reduce hazardous situations due to
unexpected rotation direction.
• WATCH YOUR STEP! Leaving excess hose unattended near working area or walk path could
result in injury or death.
• Wearing eye/face protection could reduce the danger to person from high speed splinters being
emitted from the tool or work surface.
• Wearing correct breathing protection will help avoid inhaling dust or debris from work process that
can be harmful to your health.
• High sound levels can cause permanent hearing loss. Use hearing protection while operating tool.
• Due to the material being processed, there may be a risk of explosion or fire. Be aware of work
surface dangers prior to beginning work.
• There is a risk of being cut due to high speed rotation. Do not touch high speed rotating disc.
• This power tool is not insulated. If contact is made with an electric current, injury may occur.
• Dust created by sanding, sawing, grinding, drilling and other related activities may expose the user to
dust and/or microscopic particles that may contain chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm.
03
1/2" THOR Impact Wrench1894
MAINTENANCE INSTRUCTION
LUBRICATION:
Before connection of the hose, apply 4 to 5 drops
of a good quality air tool oil at the air inlet.
After 3 to 4 hours of operation, oiling may be
necessary again.
TIGHTNESS OF PARTS:
Regularly check whether all connection parts are
fastened securely. Follow this procedure daily
before beginning work.
DISPOSAL:
Follow national legislation of waste disposal.
STORAGE:
Avoid storing the tool in a location subject to high
humidity. If the tool is left unused, the residual
moisture inside the tool can cause rust. Before
storing and after operation, oil the tool at the air
inlet with a good quality air tool oil and run it for a
short period.
ORDERING SERVICE PART:
For further operational and handling information
or for replacement of parts and components,
contact the sales agent from where you purchased
the tool, or the service division of our company,
phone number 800-221-9705.
* When ordering parts and components, give
each part number, name, and quantities.
WARNING

Pitch Pipe Back
Toward Air Receiver
Oil and Water Extractor should be at least 25 ft. from the compressor.
Further if possible.
Oil and Water
Extractor
PIPE SIZE, I.D. (Inches)
04
1/2" THOR Impact Wrench1894
SUGGESTED AIR LINE CONNECTION
The oil and water extractor should not be mounted on or near the air compressor.
The temperature of air is greatly increased during compression. As the air cools down to room
temperature, in the air line, on its way to the Air Power Tool, the moisture contained in it condenses.
Thus, for maximum effectiveness, the oil and water extractor should be mounted at some point in the
air supply system where the temperature of the compressed air in the line is likely to be lowest.
Air lines must be properly drained daily. Each low point in an air line acts as a water trap. Such points
should be fitted with an easily accessible drain. See diagram below. Pitch all air lines back towards the
compressor so that condensed moisture will flow back into the air receiver where it can be drained off.
Drain daily.
Install Drain
at Each Low Point
COMPRESSOR UNIT
Drain Daily
Drain Daily
Drain Daily
25 FEET OR MORE
Air Flow
(CFM)
10
20
30
40
50
70
50
1/2"
3/4"
3/4"
1"
1"
1"
100
3/4"
3/4"
3/4"
1"
1"
1"
150
3/4"
3/4"
1"
1"
1"
1-1/4"
200
3/4"
1"
1"
1"
1-1/4"
Length of Pipe (feet)

Call 1.800.221.9705 for questions concerning performance of the product or other inquiries.
05
1/2" THOR Impact Wrench1894
PARTS BREAKDOWN
1
2
3
19
20
21
22
23
24
25
27
26
28
31
12
13
35
34
33
32
4
17
52
51
50 49
47
48
46
45
44
43
42 41 40
39
38
37
36
18 4
5
6
7
8
9
10
8
11
14
15
12
13
16
17
42A 41-1
40-1
39A
39
*
39A
*
2A
30
29
53
DescriptionPart No. Index
Anvil Kit (1/2")
Socket Retainer Kit (1/2") 1 US
Air Inlet Bushing Kit
Exhaust Deflector Kit
Cylinder Kit
Trigger Kit
Front Cover Kit
Air Regulator Kit
Repair kit
1894-54
1894-55
1894-56
1894-57
1894-58
1894-59
1894-60
1894-61
1894-62
39, 40, 41
40, 41
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
15, 16, 17
28, 29, 30
32, 33, 34, 50, 51, 52
43, 44
4, 17, 45, 46, 47, 48, 49
1, 5, 7, 22, 23, 27, 31, 32, 33

Call 1.800.221.9705 for questions concerning performance of the product or other inquiries.
06
1/2" THOR Impact Wrench1894
PARTS LIST
1
2
2A
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1894-1
1894-2
1894-2A
1894-3
1894-4
1894-5
1894-6
1894-7
1894-8
1894-9
1894-10
1894-11
1894-12
1894-13
1894-14
1894-15
1894-16
1894-17
1894-18
1894-19
1894-20
1894-21
1894-22
1894-23
1894-24
1894-25
1894-26
1894-27
1894-28
Cap Screw
Label
Label
Housing
Spring Pin
O-Ring
Air Regulator
O-Ring
Thrust Washers
Steel Ball (SD2)
Ball Positioning Piece
Air Inlet Bushing
Spring
Steel Ball
Mesh Filter
Exhaust Deflector
Muffler Cover
Screw
O-Ring
Rubber Gasket
Screw
Washer
Ball Bearing
Screw
Rear End Plate
Spacer
Rotor
Rotor Blade Kit
Cylinder
Index Part No. QtyDescription
4
1
1
1
1
2
1
4
2
3
1
1
2
2
1
1
1
2
1
1
1
1
1
3
1
1
1
7
1
29
30
31
32
33
34
35
36
37
38
39
39A
40
40-1
41
41-1
42
43
44
45
46
47
48
49
50
51
52
53
1894-29
1894-30
1894-31
1894-32
1894-33
1894-34
1894-35
1894-36
1894-37
1894-38
1894-39
1894-39A
1894-40
1894-40-1
1894-41
1894-41-1
1894-42
1894-43
1894-44
1894-45
1894-46
1894-47
1894-48
1894-49
1894-50
1894-51
1894-52
1894-53
Steel Ball (SD2)
PIN
Ball Bearing
Rear Throttle Valve
Front Throttle Valve
Retainer Ring
Gasket
Hammer Cage
Hammer Dog
Hammer Pin
Anvil Kit
Anvil Kit
O-Ring
O-Ring
Socket Retainer
Socket Retainer
Anvil Bushing(1/2")
Front Cover
Grease Fitting
O-Ring (W1.5xd15)
Air Regulator
Reverse Lever
Cover
Screw
Spring
O-Ring
Trigger
3/8" to 1/4" NPT Reducer
Index Part No. QtyDescription
2
2
1
1
1
1
1
1
2
2
1
1
5
5
5
5
1
1
1
1
1
1
1
2
1
1
1
1