Napa 775-0111A User manual

1
775-0111A Rev. 03/08/04
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION
INSTRUCTION MANUAL & PARTS BREAKDOWN
775-0111A
3/8" DR. BUTTERFLY
IMPACT WRENCH
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.
Specifications
Square Drive . . . . . . . . . . . . .3/8"
Max. Torque . . . . . . . . . .75 ft.lbs.
Working Torque . . . . .30-60 ft.lbs.
Free Speed . . . . . . . . .10,000 RPM
Air Inlet . . . . . . . . . . . . .1/4" NPT
Hose Size . . . . . . . . . . . . .3/8" I.D.
Rec. Air Pressure . . . . . . . . .90 PSI
Air Consumption . . . . . . . .4 CFM
Sound Level . . . . . . . . . . .110 dBA
Weight . . . . . . . . . . . . . .2.34 Lbs.
Length . . . . . . . . . . . . . . . . . . .6"


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775-0111A Rev. 03/08/04
▲WARNING!
FAILURE TO OBSERVE THESE WARNINGS COULD RESULT IN INJURY.
!
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE THIS MANUAL FOR FUTURE REFERENCE.
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.
• Impact wrenches are not torque control devices.
Fasteners with specific torque requirements must be
checked with suitable torque measuring devices after
installation with an impact wrench.
• Use only impact sockets and accessories on this tool.
Do not use hand sockets.
• Do not lubricate tools with flammable or volatile
liquids such as kerosene, diesel or jet fuel.
• Do not force tool beyond its rated capacity.
• Do not remove any labels. Replace any damaged labels.
• Use accessories recommended by Napa Air Tools.

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775-0111A Rev. 03/08/04
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE THIS MANUAL FOR FUTURE REFERENCE.
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.
Low pressure (under 90 psig; 6.2 bar) reduces the speed
of all air tools. Low air pressure not only wastes time,
but also costs money. Higher pressure (over 90 psig; 6.2
bar) raises performance beyond the rated capacity of
the tool, which will shorten tool 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 American Thread. 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 NAPA 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 amount of oil to be used
is 1 ounce. Overfilling will cause a reduction in the
power of the tool.
OPERATING INSTRUCTIONS
This impact wrench is rated at 3/8" 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.
NOTE: Actual torque on a fastener is directly related to
joint hardness, tool speed and condition of socket.
Use the simplest possible tool-to-socket hook up. Every
connection absorbs and reduces power.
The forward and reversing lever (A) Figure 1, is used to
change the rotation of the tool. When the lever is set
in forward position (F), the tool will turn in a right
hand rotation. When the lever is moved to the reverse
position (R), the tool will run in reverse or left hand
rotation.
TROUBLESHOOTING
Other factors outside the tool may cause loss of power
or erratic action. Reduced compressor output, excessive
drain on the air line, moisture or restrictions in air
pipes or the use of hose connections of improper size
or poor conditions may reduce air supply. Grit or gum
deposits in the tool may cut power and may be
corrected by cleaning the air strainer and flushing out
the tool with gum solvent oil or an equal mixture of
SAE # 10 and kerosene. If outside conditions are in
order and tool continues erratic action or low power,
disconnect tool from hose and contact your nearest
NAPA/EVERCRAFT authorized service center.
INSTRUCTION MANUAL & PARTS BREAKDOWN
(B) Air Inlet
(A) Forward &
Reversing Lever
Nipple

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775-0111A Rev. 03/08/04
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE THIS MANUAL FOR FUTURE REFERENCE.
INSTRUCTION MANUAL & PARTS BREAKDOWN
Ref. # Item # DESCRIPTION QTY
1 RS165NAPA01 Housing 1
2 RS16502 Bushing 1
3 * Anvil Collet 1
4 * O-Ring 1
5 RS16505 Anvil 1
6 RS16506 Pin 1
7 RS16507 Hammer Dog 1
8 RS16508 Drive Cam 1
9 RS16509 Hammer Cage 1
10 RS165NAPA10 Screw 1
11 RS16511 Trigger Pin 2
12 RS16512 Trigger 1
13 RS10920 Bearing 1
14 * Oil Seal 1
15 RS16515 Front Plate 1
16 RS16516 Rotor 1
17 * Rotor Blade 6
18 RS16518 Cylinder 1
19 RS16519 Pin 1
20 RS16520 End Plate 1
21 RS21114 Bearing 1
22 * Rear Gasket 1
Ref# Item# DESCRIPTION QTY
23 RS16523 Rear Cover 1
24 RS16NAPA24 Air Inlet Block 1
25 RS16525 Air Regulator 1
26 * O-Ring 1
27 * O-Ring 3
28 RS16528 Spring 2
29 RS16529 Valve Stem 2
30 * Spring 2
31 * Valve Seat 2
32 * O-Ring 1
33 * O-Ring 1
34 RS16534 Spring Washer 4
35 RS16535 Screw 4
36 RS16536 Washer 1
37 RS16537 Retainer Ring 1
38 * Spring 1
39 * Steel Ball 1
40 RS16540 Retainer Plate 1
41 RS16039 Screw 2
42 * Oil Seal 1
43 RS16543 Rubber 1
775-0111A
3/8" DR. BUTTERFLY
IMPACT WRENCH
* Available only in the repair kit: RS111RK

5
775-0111A Rev. 03/08/04
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE THIS MANUAL FOR FUTURE REFERENCE.
IMPACT WRENCHES
TOOL RUNS SLOWLY OR NOT AT ALL AND/OR AIR FLOWS ONLY SLIGHTLY FROM EXHAUST — This is probably caused
by: air flow blocked by dirt build-up; motor parts jammed with dirt; power regulator has vibrated to closed
position.
YOU SHOULD: Check air inlet strainer for blockage. Pour a generous amount of air tool oil into air inlet. Operate
tool in short bursts, in both forward and reverse motion. Repeat if necessary. If tool performance is not
improved, it should be serviced at an authorized service center.
TOOL WILL NOT RUN, EXHAUST AIR FLOWS FREELY. This is probably caused by one or more motor vanes stuck due
to accumulation of sludge or varnish; motor rusted.
YOU SHOULD: Pour a generous amount of air tool oil into air inlet. Operate tool in short bursts, in both forward and
reverse motion. Lightly tap motor housing with plastic mallet. Detach air supply. Try to free motor by turning
drive shank manually, if possible. If tool remains jammed, it should be serviced at authorized service center.
SOCKETS WILL NOT STAY ON. This is probably caused by: worn socket retainer ring or soft back-up ring.
YOU SHOULD: Wear safety goggles. Detach air supply. Using external retaining ring pliers, remove old retaining ring.
Holding square drive with appropriate open-end wrench, use small screwdriver to pry old retainer ring
out of groove. Always pry off ring away from your body - it can be propelled outward at high velocity. Replace
back-up O-ring and retainer ring with correct new parts. (See breakdown). Place retaining ring on table, press
tool anvil into ring in a rocking motion. Snap into groove by hand.
PREMATURE ANVIL WEAR. This is probably caused by: use of chrome sockets or worn sockets.
YOU SHOULD: Stop using chrome sockets. Chrome sockets have a hard surface and a soft core. Drive hole becomes
rounded - but will still be very hard. Besides the danger of splitting, wrench anvils will wear out prematurely
when used with chrome sockets.
TOOL SLOWLY LOSES POWER BUT STILL RUNS AT FULL FREE SPEED. This is probably caused by: worn clutch parts,
due to inadequate lubrication; engaging cam of clutch worn or sticking due to inadequate lubrication.
YOU SHOULD: FOR OIL LUBED WRENCHES - check for presence of clutch oil (where oil is specified for clutch) and
remove oil fill plug; tilt to drain all oil from clutch case; refill with 30 weight SAE oil or that recommended by
manufacturer, in the specified amount. Also check for excess clutch oil. Clutch cases need only be filled 50%.
Overfilling can cause drag on high speed clutch parts. A typical 1/2" oil-lubed wrench only requires 1/2 ounce of
clutch oil. FOR GREASE LUBED WRENCHES - Check for excess grease by rotating drive shank by hand. It should
turn freely. Excess is usually expelled automatically.
TOOL WILL NOT SHUT OFF. This is probably caused by: throttle valve O-ring broken or out of position or throttle
valve stem bent or jammed with dirt particles.
YOU SHOULD: Remove assembly and install new O-ring. Lubricate with air tool oil and operate trigger briskly. If
operation cannot be restored, tool should be serviced at authorized service center.
AIR RATCHETS
MOTOR RUNS. SPINDLE DOESN'T TURN, OR TURNS ERRATICALLY — This is probably caused by: worn teeth on ratchet
or pawl; weak or broken pawl pressure spring; weak drag springs fail to hold spindle while pawl advances for
another bite.
YOU SHOULD: Have replacement parts installed by authorized service center.
TOOL DOESN’T RUN, RATCHET HEAD INDEXES CRISPLY BY HAND— This is probably caused by: dirt or sludge
build-up in motor parts.
YOU SHOULD: Pour a generous amount of air tool oil into air inlet. Operate throttle in short bursts. With socket
engaged on bolt, alternately tighten and loosen bolt by hand. If tool remains jammed, it should be serviced at
authorized service center.
TROUBLESHOOTING