Sunex Tools SX951 User manual

Rev. 02/18/02
SX951 1
SX951
1/2" DR. H.D.
IMPACT WRENCH
SPECIFICATIONS
Free Speed ..................7500 RPM
Max. Torque................420 ft. lbs.
Torque Range ........50-350 ft. lbs.
Air Pressure ........................90 PSI
Air Consumption ..............4 CFM
Sound Level......................91 dBA
Length ................................7-3/4"
Shipping Wt. ....................5.9 lbs.
Operating Instructions • Warning Information • Parts Breakdown
This operating manual contains important safety information.
Read carefully and understand all information before operating tool.
Save this manual for future use.
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION
Some dust created by power sanding, sawing, grinding, drilling,
and other construction activities contains chemicals known to
cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement
and other masonry products, and
• arsenic and chromium from
chemically-treated lumber.
Your risk from these exposures varies, depending on how often
you do this type of work. To reduce your exposure to these
chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are
specially designed to filter out microscopic particles.

Rev. 02/18/02
SX951 2
WARNING!
This Instruction Manual Contains Important
Safety Information.
READ THIS INSTRUCTION MANUAL
CAREFULLY AND UNDERSTAND ALL
INFORMATION BEFORE OPERATING THIS
TOOL.
• Always operate, inspect and maintain
this tool in accordance with American
National Standards Institute Safety Code
of Portable Air Tools (ANSI B186.1) and
any other applicable safety codes and
regulations.
• For safety, top performance and maximum
durability of parts, operate this tool at
90 psig 6.2 bar max air pressure with
3/8” diameter air supply hose.
• Always wear impact-resistant eye and
face protection when operating or
performing maintenance on this tool.
Always wear hearing protection when
using this tool.
• High sound levels can cause permanent
hearing loss. Use hearing protection as
recommended by your employer or
OSHA regulation.
• Keep the tool in efficient operating
condition.
• Operators and maintenance personnel
must be physically able to handle the
bulk, weight and power of this tool.
• Air under pressure can cause severe
injury. Never direct air at yourself or
others. Always turn off the air supply,
drain hose of air pressure and detach
tool from air supply before installing,
removing or adjusting any accessory
on this tool, or before performing any
maintenance on this tool. Failure to do
so could result in injury. Whip hoses can
cause serious injury. Always check for
damaged, frayed or loose hoses and
fittings, and replace immediately. Do not
use quick detach couplings at tool. See
instructions for correct set-up.
• Air powered tools can vibrate in
use. Vibration, repetitive motions or
uncomfortable positions over extended
periods of time may be harmful to your
hands and arms. Discontinue use of tool
if discomfort, tingling feeling or pain
occurs. Seek medical advice before
resuming use.
• Place the tool on the work before starting
the tool. Do not point or indulge in any
horseplay with this tool.
• Slipping, tripping and/or falling while
operating air tools can be a major cause
of serious injury or death. Be aware of
excess hose left on the walking or
work surface.
• Keep body working stance balanced and
firm. Do not overreach when operating
the tool.
• Anticipate and be alert for sudden
changes in motion during start up and
operation of any power tool.
• Do not carry tool by the hose. Protect the
hose from sharp objects and heat.
• Tool shaft may continue to rotate briefly
after throttle is released. Avoid direct
contact with accessories during and after
use. Gloves will reduce the risk of cuts
or burns.
• Keep away from rotating end of tool.
Do not wear jewelry or loose clothing.
Secure long hair. Scalping can occur
if hair is not kept away from tool and
accessories. Choking can occur if
neckwear is not kept away from tool
and accessories.
• Never use a chisel as a handstruck tool. They are
designed and heat treated to be used only in air
hammers. Select the correct shank and retainer for the
tool.
• Never use dull accessories. Never cool a hot accessory in
water as brittleness and early failure can result. Accessory
breakage or tool damage may result from prying. Take
smaller bites to avoid getting stuck.
• Do not lubricate tools with flammable or volatile liquids
such as kerosene, diesel or jet fuel.
• Don’t force tool beyond its rated capacity.
• Do not remove any labels. Replace any damaged labels.
• Use accessories recommended by Sunex Tools.
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY.

Rev. 02/18/02
SX951 3
Nipple
Operating Instructions • Warning Information • Parts Breakdown
Air Supply...
Tools of this class operate on a wide range of air pressures. It
is recommended that air pressure of these tools measures 90
PSI at the tool while running free. Higher pressure (over 90
psig; 6.2 bar) raises performance beyond the rated capacity
of the tool which will shorten the tool’s life because of faster
wear and could cause injury.
Always use clean, dry air. Dust, corrosive fumes and/or water
in the air line will cause damage to the tool. Drain the air
tank daily. Clean the air inlet filter screen on at least a weekly
schedule. The recommended hookup procedure can be
viewed in the above figure.
The air inlet used for connecting air supply, has standard
1/4" NPT. Line pressure should be increased to compensate
for unusually long air hoses (over 25 feet). Minimum hose
diameter should be 3/8" I.D. and fittings should have the
same inside dimensions and be tightly secured.
Lubrication...
Lubricate the air motor daily with quality air tool oil. If no air
line oiler is used, run a teaspoon of oil through the tool. The
oil can be squirted into the tool air inlet or into the hose at the
nearest connection to the air supply, then run the tool. The oil
plug is ONLY for adding standard SAE 10 or 20 grade oil
after repair or maintenance. The amount of oil to be used is
1 ounce. Overfilling will cause a reduction in the power of the tool.
Operation...
The air regulator knob can be used as an air throttle, if there
are no other means of regulating air. Turn the air regulator
knob all the way to position 4 for maximum power.
The air regulator can be used to adjust torque to the
approximate tightness of a known fastener.
To set the tool to desired torque, select a nut or screw of
known tightness of the same size, thread pitch and thread
condition as those on the job. Turn air regulator to low
position, apply wrench to nut and gradually increase power
(turn regulator to admit more air) until nut moves slightly in
the direction it was originally set. The tool is now set to
duplicate that tightness - note regulator setting for future use.
When tightening nuts not requiring critical torque values, run
nut up flush and then tighten an additional one-quarter to
one-half turn (slight additional turning is necessary if gaskets
are being clamped). For additional power needed on
disassembly work, turn regulator to its fully open position. This
impact wrench is rated at 1/2" USS bolt size. Rating must be
down graded for spring U bolts, tie bolts, long cap screws,
double depth nuts, badly rusted conditions and spring
fasteners as they absorb much of the impact power. When
possible, clamp or wedge the bolt to prevent springback.
Soak rusted nuts in penetrating oil and break rust seal before
removing with impact wrench. If nut does not start to move in
three to five seconds use a larger size impact wrench. Do not
use impact wrench beyond rated capacity as this will
drastically reduce tool life.
The reversing valve is used to change the rotation of the tool.
When the valve is out, the tool is in a forward or right hand
rotation. When the valve is pushed in, the rotation is reverse
or left hand. (The illustration of the tool shows the tool in the
reverse position.)
NOTE: Actual torque on a fastener is directly related to joint
hardness, tool speed, condition of socket and the time the tool
is allowed to impact. Use the simplest possible tool-to-socket
hook up. Every connection absorbs energy and reduces
power.

Rev. 02/18/02
SX951 4
SX951
1/2" Dr. H.D. Impact Wrench
46
48
50
38
37
32
31
39
1
42
4
5
5
16
40
41
15
18
22
43
20
44
21
20
19
1714 24
23 25
36
35
34
33
29
30
26
27
3
7
6
9
8
10
11
47
45
13
12
28

Rev. 02/18/02
SX951 5
LIMITED WARRANTY:
SUNEX INTERNATIONAL, INC. WARRANTS TO ITS CUSTOMERS THAT THE COMPANY’S SUNEX TOOLSTM
BRANDED PRODUCTS ARE FREE FROM DEFECTS IN WORKMANSHIP AND MATERIALS.
Sunex International, Inc. will repair or replace its Sunex ToolsTM branded products which fail to give satisfactory
service due to defective workmanship or materials, based upon the terms and conditions of the following
described warranty plans attributed to that specific product.
This product carries a ONE-YEAR warranty. During this warranty period, Sunex Tools will repair or replace at our
option any part or unit which proves to be defective in material or workmanship.This warranty does not cover
damage to equipment or tools arising from alteration, abuse, misuse, damage and does not cover any repairs
or replacement made by anyone other than Sunex Tools or its authorized warranty service centers.The
foregoing obligation is Sunex Tools’ sole liability under this or any implied warranty and under no circumstances
shall we be liable for any incidental or consequential damages.
Note: Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you.
Return equipment or parts to Sunex Tools, or an authorized warranty service center, transportation prepaid. Be
certain to include your name and address, evidence of the purchase date, and description of the suspected
defect.If you have any questions about warranty service, please write to Sunex Tools. This warranty gives you
specific legal rights and you may also have other rights which vary from state to state.
Repair kits and replacement parts are available for many of Sunex Tools products regardless of whether or not
the product is still covered by a warranty plan.
Sunex Tools • 315 Hawkins Rd. • Travelers Rest, South Carolina 29690
Ref. # Item # DESCRIPTION QTY
1 95101 Housing 1
2 Valve Sleeve (Inc. in 95101) 1
3 95103 Reverse Valve 1
4 95104 Trigger 1
5 95105 Throttle Spring Pin 2
6 95106 Bushing 1
7 95107 Pin Throttle 1
8 95108 Steel Ball 1
9 95109 Spring 1
10 95110 Hose Adapter 1
11 95111 Air Regulator 1
12 95112 O-Ring 1
13 95113 Locating Ring 1
14 95114 Seal 1
15 95115 Spacer 1
16 95116 Anvil Bushing 1
17 729478 Ball Bearing 1
18 95118 1" Anvil (Standard) 1
19 95119 Hammer Cage 1
20 95120 Hammer Bar 2
21 95121 Drive Cam Foundation 1
22 95122 Drive Cam 1
23 95123 Pin Cylinder 1
24 95124 O-Ring 1
25 95125 Cylinder 1
Item # DESCRIPTION QTY
26 95126 Rotor 1
27 95127 Rotor Blade 6
28 95128 Front End Plate 1
29 227B25 Ball Bearing 1
30 95130 Rear End Plate 1
31 95131 Spring 1
32 95132 Pin 1
33 95133 Rear Gasket 1
34 95134 Rear Cover 1
35 95135 Screw 4
36 95136 Pin 1
37 95137 Exhaust Deflector 1
38 95138 Screw 1
39 95139 Grub Screw 1
40 95140 Anvil Collar 1
41 95141 O-Ring 1
42 95142 Screw 1
43 95143 Spring 1
44 96144 Steel Ball 1
45 95145 Steel Ball 1
46 95146 Protecting Rubber 1
47 95147 Spring 1
48 95148 Oil Seal 1
50 95150 Spacer 1
95151 2" Anvil (Optional) 1
Parts List