Operator Instructions
t
Includes - Foreseen Use, Work Stations, Putting Into Service,
Operating, Dismantling, Assembly and Safety Rules
Important
Read these instructions carefully before insta lling, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Manufacturer/Supplier Product Type
Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
3/8 Square Drive Pistol
Grip Impact Wrench
Model No/Nos Serial No
High Wycombe
Bucks
UT5030
HP14 3BY
Tel No Fax No
(01494) 883300 (01494) 883237
RPM
11,000
Cycles Per Min
Product Nett Weight
2.64
1.2
lbs
Kg
Recommended Use Of
Balancer Or Support
No
Air Pressure
Recommended Working
Recommended Minimum
Maximum
6.3
n/a
7.0
bar
bar
bar
90
n/a
100
Personal Safety Equipment
Use - Safety Glasses
Yes
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors
Yes
Foreseen Use Of Tool
The impact wrench is designed for the tightening and loosening
of threade d fas ten er s w ithin the ra nge as spe cifie d by the
manufacturer. It should only be used in conjunction with suitable
impact type 3/8" square female drive nut running sockets. Only
use sockets which are of the impact type.
It is allowed to use suitable extension bars, universal joints and
socket adaptors between the square output drive of the impact
wrench and the square female drive of the socket.
Do not use the tool for any other purpose than that specified
with out co nsul ti ng th e ma nufa ctur er or th e man uf act urer 's
authorised supplier. To do so may be dangerous.
Never u se an impact wre nch as a ha mmer to dislodge or
straighte n cross threaded fas teners. Never a ttempt to modify
the tool for other uses and never modify the tool for even its
recommended use as a nutrunner.
Work Stations
The tool should only be used as a handheld hand operated tool.
It is always recommended that the tool is
used wh en standing on the s olid floor. It
can be in other positions but before any
such use, the operator must be in a secure
position having a firm grip and footing and
be aware that when loosening fasteners
the tool can move quite quickly away from
the fas tener being undone. An allowa nce
must alw ays be ma de for this rea rward
movement so as to avoid the possibility of
hand/arm/body entrapment.
Recommended Hose Bore
Size - Minimum
3/8 10 30 10
Ins M/M Ft M
Noise Level
PSI
Test Method
PSI
est code PN8NTC1 and ISO Standard 3744
PSI
Vibration Level
Test Method
Sound Pressure Level 91.0 dB(A)
Sound Power Level 103.0 dB(A)
Tested in accordance with Pneurop
8.9
Tested in accordance with ISO
standard 8662 Parts 1 & 7
Putting Into Service
Air Supply
Use a clean lubricated air supply that will give a measured air
pressure at the tool of 90 p.s.i./6.3 bar when the tool is running
with the trigger fully depresse d and the air regu lator in its
maximum opening flow position. Use recommended hose size
and length. It is recommended that the tool is connected to the
air supply as shown in figure 1. Do not connect a quick connect
coupling directly to the tool but use a whip or leader hose of say
approximately 12 inches length. Do not connect the tool to the
air line sys tem withou t incorporating an easy to reach a nd
operate air shut off valve. The air supply should be lubricated. It
is strongly recommended that an air filter, regulator, lubricator
(FRL) is used as shown in Figure 1 as this will supply clean ,
lubricated air at the correct pressure to the tool. Details of such
equipment can be obtained from your supplier. If such
equipment is not used then the tool should be lubricated by
shutting off the air supply to the tool, depressurising the line by
pressing the trigger on the tool. Disconnect the air line and pour
Recommended Max.
Hose Length
Metres / Sec²
Page No 1
into the intake bushing (46) a teaspoonful (5ml) of a suitable
pneumatic motor lubricating oil preferably incorporating a rust
inhibitor. Reconnect tool to air supply and run tool slowly for a
few sec onds to allow air to circulate the oil. If tool is used
frequently lubricate on daily basis and if tool starts to slow or
lose power.
It is recommended that the air pressure at the tool whilst the
tool is running is 90 p.s.i./6.3 bar. The tool can run at lower and
higher pressures with the maximum permitted working air
pressure of 100 p.s.i./7.0 bar. For a lower air pressure the tool
will give a lower output for a given setting of the air regulator set
for 90 p si o perat io n and an i ncrea sed o utp ut fo r hig her
pressures. Hence it is possible that changes in supply pressure
can gi ve si tuat io ns wher e the fast ener i s und er o r o ver
tightened. For changes in pressure, the regulator position and
application should be reassessed.
It is recommended that joint tightness of the threaded fastener
assembly be checked with suitable measuring equipment.
Operating
The output of the impact wrench in prime working condition is
governed by mainly three factors
a) the input air pressure
b) the time the impact wrench is operated on the joint. Normal
time for joints of average tension requirement 3 to 5 seconds
c) the setting of the air regulator for a given joint a t a given
pressure operated for a given time.
The air regulator item (45) can be used to regulate the output of
the impact wrench if no other control means is available. It is
strongly recommended that an external pressure regulator
ideally as part of a filter/regulator/lubricator (FRL) is used to
control air inlet pressure so that the pressure can be set to help
control the ten sion requ ired to be applied to the th readed
fastener joint.
There is no consistent reliable torque adjustment on an impact
wrench of this type. However, the air regulator can be used to
adjust torque to the approximate tightness of a known threaded
joint. To set the tool to the 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 se t. The tool is now s et to duplicate tha t 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 wre nch is rated a 3/8" bolt size.
Rating must be down graded for spring U bolts, tie bolts, long
cap sc rews, double depth nu ts, badly rusted con ditions 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, 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.
Dismantling & Assembly Instructions
Disconnect tool from air supply
Remove oil fill plug (18) and O-ring (19) and drain oil into a
suitable receptacle.
Grip motor housing (1) in a vice with soft jaws and drive out pin
Page No 2
(7) and pull out regulator (45) together with O-ring (46) taking
care n ot to los e ball (47) a n d s pring (48). Un sc rew inta ke
bushing (9) and remove spring (10), valve (12) and pin (14).
Drive out trigger pin (5) and remove trigger (6).
Unscrew deflector screws (3) and remove exhaust deflector (2).
Grip reverse button (17) on the hexagon with a suitable spanner
and unscrew it from reverse valve (15) by use of a hexagon allen
key in the end of the reverse valve. The reverse valve (15) may
be pushed out of the motor housing (1). O-rings (16) - 2 off may
be carefully prised out of the grooves in the brass reverse valve
bushing. Do not remove the brass bush.
Rubber guard (50) may be removed from motor housing (1).
Remove 4 off socket head screws (44) and lock washers (43)
and take off back cap (42) and back cap gasket (41). Pull out
motor assembly. Remove motor pin (26).
The front end plate (27) complete with O-ring (28), bearing (31)
and seal (30) may be slid off of the front end of rotor (24).
O-ring (28) may be carefully prised out of the groove, in the front
end plate, the bearing (31) tapped out with a suitable punch and
the oil seal (30) removed. Remove cylinder (23), noting the way
it should be positioned on reassembly and remove 6 off rotor
blades (25) from rotor (24).
Tap off rear end plate (22) complete with bearing (21). Bearing
(21) may be tapped out of rear end plate (22) using a suitable
punch.
Remove snap ring (29) from housing (1). The complete hammer
assembly may be withdrawn from the motor housing (1). Pull
out anvil (35) and anvil spacer (38), remove pin (34) and
hammer (39) and cam (33) may be removed from cage (32).
Remove socket retaining ring (37) and O-ring (36) from anvil
(35). Oil seal (40) may be hooked out of motor housing (1).
Reassembly
Examine all parts for wear and examine oil rings and seals for
sign s o f c ut s o r we ar e t c. Parti cu l ar l y e xam i n e a nv i l ( 35)
particularly around the square drive area, hammer dog (39) and
cam (33) for wear and cracks. Replace any parts with those
supplied by the manufacturer or an authorised distributor.
Clean and lubricate all parts with a suitable pneumatic tool
lubricating oil and reassemble in the reverse order. On
completion of as sembly check anvil will rotate and le ver and
reverse valve operate freely. Remove plug (18) and O-ring (19)
and inject approx. 1/2 ounce (15cc) of a SAE10 or 20 oil.
Replace plug and O-r i ng. In j ec t appr o x. 5 m l of a su itable
pneumatic tool lubricating oil(preferably incorporating a rust
inhibitor) into the tool via air inlet bushing (9). Connect tool to a
suitable air supply, run tool slowly for a few seconds to allow oil
to circulate and reset for operation. See section “Operating”.
Safety Rules When Using an Impact
Wrench
1) Read all the instructions before using this tool. All operators
must be fully trained in its use and aware of these safety rules.
All service and repair must be carried out by trained personnel.
2)The socket used must be of the correct drive size and the
"impact" type. Never use sockets other than impact type.
3) Do not use sockets with excessive wear to the input and
output drives. Check that the square on any other type of drive
or the impact wrench is not cracked or excessively worn before
fitting or changing socket, extension, etc. Make sure that the
socket is firmly fixed to the tool.
4) Always ensure that a stable position or footing is adopted
before using the tool.
5) Ensure that the tool has been correctly set up on a test joint.
Incorrect set up could cause joint breakage with sudden and
unexpected movement of the tool.
6) Use only correct spare parts for repair.
7) Always ensure that the reverse valve is in the correct position
before operating the tool. Do not run the tool unless the socket
UT5030 3/8" Square Drive Pistol Grip Impact Wrench
Ref No Part No Description
1 106501 Motor Housing
2 106502-1JBO Deflector
3 106119-1EAO Screw
5 P-0030-220 Pin
6 106506-1AAO Trigger
7 P-0030-240 Pin
8 106508-1AAO Reverse Bushing
9 106509-1JBO Inlet Bushing
10 104006-2AAO Spring
11 106511-1AAO Ball Seat
12 106512-1AAO Steel Ball
13 O-0240-115 O-Ring
14 106514-1GRO Valve Pin
15 106515-1GRO Reverse Valve
16 O-0925-178 O-Ring (2)
17 106517-1JBO Screw
18 106107-1JBO Screw
19 O-0400-170 O-Ring
21 0626-ZZ0A Ball Bearing
22 106522 Rear End Plate
23 106133-1BBO Cylinder
24 106130-1GRO Rotor
25 106132-1GRO Rotor Blade (6)
Nov 2004 Ver 1.0
Ref No Part No Description
26 106526-1AAO Pin
27 106135 Front End Plate
28 0-3550-180 O-Ring
29 R-R390 Retaining ring
30 106136-1AAO Oil Seal
31 77R6-ZZ0A Ball Beari ng
32 106140-1TTO Hammer Cage
33 106141-1TTO Drive Cam
34 106143-1GRO Pin
35 106144-1GRO Anvil
36 106145-1AA0 Socket O-Ring
37 106146-1AAO Socket Retainer
39 106142-1TTO Hammer Dog
40 106103-1AAO Oil Seal
41 106541-1SPO Motor Gasket
42 106542 Housing Cap
44 106150-1JBO Screw (4)
45 106545-1JBO Regulator
46 0-1200-240 O-Ring
47 1065 4 7- AAA0 Steel B all
48 106548-1AA0 Spring
49 106102 Bushing
50 106104 Rubber Nose Guard
Page No 3
Declaration of Conformity
Universal Air Tool Company Limited
Unit 8, Lane End Industrial Park, High Wycombe, Bucks, HP14 3BY, England
declare under our sole responsibility that the product
Model UT5030 3/8 Impact Wrench, Serial Number
to which this declaration relates is in conformity with the following standard(s) or other normative document(s)
EN792 (Draft), EN292 Parts 1 & 2, ISO 8662 Parts 1 & 7, Pneurop PN8NTC1
following the provisions of
89/392/EEC as amended by 91/368/EEC & 93/44/EEC Directives
Lane End D.H.Moppett (Man. Director)
Place and date of issue Name and signature or equivalent marking of authorised person
is first located on the joint.
8) Check hose and fittings regularly for wear. Use quick connect
couplings only as recommended. See "Putting into Service". Do
not carry the tool by the hose and ensure that the hand is away
from the on/off valve when carrying.
9) Do not attempt to hold or guide the socket by hand when the
tool is running.
10) Do not exceed maximum recommended air pressure.
11) Use safety equipment as recommended.
12) The tool is not electrically insulated. Do not use where there
is a possibility of coming into contact with live electricity.
13) Preferably shut off the air supply before changing sockets or
at least ensure that the hands are well clear of the operating
trigger.
14) Take care against entanglement of moving parts of the tool
with clothing, ties, hair, cleaning rags, etc.
15) When loosening fasteners first ensure that there is sufficient
clearance behind the tool to avoid hand entrapment. The tool
will move away from the threaded joint as the nut/bolt etc. is
loosened and rides up the thread moving the tool with it.
16) Only use extensions, adaptors and universal joints suitable
for use with impact wrenches.
17) If the tool appears to malfunction remove from use
immediately and arrange for service and repair.
Accessories
Notes
Distributor
This document may not be copied wholly or in part by anyone without the consent of the Directors of Universal Air Tool Company Limited
Designed & Written in the U.K.
©Copyright of Universal Air Tool Company Limited, established in the United Kingdom, 1994
Page No 4
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