Universal Tool UT8961 Specifications

Manufacturer/Supplier Product Type
RPM
Cycles Per Min
Tel No
Fax No
[phone]
[phone]
Model No/Nos Serial No
Product Nett Weight Recommended Use Of
Balancer Or Support
Recommended Hose Bore
Size - Minimum
Recommended Max.
Hose Length
Ins M/M Ft M
Foreseen Use
These screwdrivers are designed for the tightening and loosening of
threaded fasteners within the range as specified by the manufacturer.
They should only be used in conjunction with 1/4" male hex shank
screwdriver bits and fastener drivers.
Do not use the tool for any other purpose than that specified without
consulting the manufacturer or his authorised representative.
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 depressed. 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 the tool to the air line system without
incorporating an easy to reach and 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 into the intake bushing a teaspoonful
Work Stations
The tool should only be used as a hand held, hand operated tool. It is
always recommended that the tool is used when standing on a solid
floor. It can be used in other positions, but before any such use the oper-
ator must be in a secure position having a firm grip and footing. The
operator must adopt a firm grip sufficient to resist the torque reaction of
the tool, i.e. the tool will try
to turn in the hand. The op-
erator must also be aware
that when loosening fasten-
ers, the tool can move quite
quickly away from the fas-
tener being undone. An al-
lowance must be made for
this rearward movement to
avoid hand entrapment.
The operator must also
make allowance that if the
tool does turn in the hand,
the hand is not trapped
against any rigid object.
No
Page No 1
Lever Start-Auto Shut Off
Angle Screwdriver
UT8961
3/8 10 30 10
300
Includes - Foreseen Use, Work Stations, Putting Into Service, Operating,
Dismantling, Assembly and Safety Rules
Operator Instructions Important
Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY
lbs
Kg
3.08
1.40
Noise Level Sound Pressure Level 78.0 dB(A)
Test Method Tested in accordance with Pneurop
test code PN8NTC1 and ISO Standard 3744
Vibration Level
Test Method Tested in accordance with ISO
standards 8662 Parts1 & 7
Less than 2.5
Metres / Sec²
Personal Safety Equipment
Use - Safety Glasses
Yes
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors
Air Pressure
Recommended Working
6.3
bar
90
PSI
Recommended Minimum
n/a
bar
n/a
PSI
Maximum
7.0
bar
100
PSI

Operating
Select the correct screwdriver bit or fastener driver to suit the screw or
fastener to be tightened or loosened.
This model has an adjustable clutch so that the torque applied to the
fastener can be adjusted to give the required tightness within the torque
range of the tool. To set the tool to give a particular torque output, first
remove the clutch housing - left hand thread and pull out the clutch
assembly. Hold the clutch carrier or insert a 1/4 hex Allen key into the
work anvil (57) and with a spanner rotate torque ring (72) until it just
touches regulation washer (71). This is the clutch set at its lowest output
level. Reassemble the tool, try it on the joint to be fastened. If more
torque is required to place the fastener repeat the process but rotate
the torque ring (72) until there is a gap between it and the sleeve
bearing proceeding at approximately one turn of the nut at a time until
the correct tightness is achieved. If too high a setting is reached rotate
the adjustment nut back a part of a turn at a time.
If the torque ring (72) is rotated too far along the clutch anvil (57) it is
possible that the clutch will not slip and a reaction torque against the
hands will be felt. In this situation, if the fastener is not sufficiently
tightened or cannot be loosened then the tool in adjustable clutch
mode has insufficient capacity. Select a more powerful tool. The person
setting up the tool must be aware of this torque reaction at high setting
levels of the clutch and that the tool will try to turn against the hand. All
that is required is a firm grip.
The tool, when the stall torque position has been reached, can still be
used to set or loosen fasteners, provided the operator is aware of the
need to resist the torque reaction of the tool. Further adjustment of
torque ring (72) at this point will not increase the output of the tool. The
only thing that will affect the output is a change in the air supply
pressure. The output can be increased up to the use of the maximum
allowed supply pressure and decreased with a reduction in supply
pressure until the tool fails to operate.
It must also be understood that even if the clutch is set to slip it may not
do so if the supply air pressure falls below the pressure at which the
clutch was set. It is therefore strongly recommended that a pressure
control valve is used. Information as to suitable equipment can be
obtained from your supplier.
When using the tool keep the screwdriver bit pressed firmly into the
screw head to avoid cam out and screw head damage.
Dismantling & Assembly Instructions
Disconnect from air supply.
To dismantle the angle head first unscrew 4 screws (84) and loosen the
angle lock nut (82) and turn clockwise and pull the angle assembly out.
Grip the tool in a vice fitted with soft jaws on the flats at the rear end of
the centre housing (25). Take off soft cover (80).
Remove torque cover (75) take off bit slide (60) torque ring (72)
regulation washer (71) and needle pins (70) Unscrew clutch housing
(69) left hand thread and remove anvil bushing (67) washer (66) torque
spring (65) spring (59) and slide base (60) When removing anvil (57)
take care not to lose ball (58).
Take off snap ring (64) and remove ball race (63) ball (51) end clutch
(61) centre clutch (55) ball (56) rear clutch (53) pilot pin (52) ball (51)
and retainer (50).
Take off C ring (54) and remove ball bearing (26) From the centre
housing remove.
third gear cage (23-C) and take off third plant gear (23-B) and third main
gear (23-A) then second main gear (21) then remove first gear cage
(20) and take off first plant gear (19) and first main gear (18) then
remove internal gear (24 & 24-1) and C ring (15).
Take off suspension ring (87) and coloured ring (88) unscrew housing
nipple (86) and air inlet bushing (49) remove second silencer (44)
spring (43) valve ball (42) O-ring (41) exhaust deflector (29) first silencer
(28-1) operating rod (32) and O-ring (27).
Remove set screw (4) and take off switch (5) Unscrew end housing (1)
and remove O-ring (2) and valve (3) Pull out air motor from centre
housing (25) tap end of rotor (16) and remove front plate (13) take out
roll pin (8) and remove end plate (7) Remove from end plate (7) roll pins
(9) and bearing (6) Take out rotor (16) from cylinder (10) and remove
rotor blades (12).
Reassembly
Clean all components and examine for wear and tear. Look in particular
for wear and cuts on O-rings, wear on rotor blades, gears and clutch
components.
Coat all parts with pneumatic tool lubrication oil, one preferably
containing a rust inhibitor and grease all bearings, gears and clutch
parts with a molybdenum or lithium based general purpose grease.
Before reassembling the motor, make sure that the faces of end plate
(7) & (13) that abut cylinder (10) are flat and free from burs. If necessary
lap on a flat fine grade of abrasive paper. Reassemble in the reverse
order.
When refitting the complete motor assembly to the centre housing (25)
first make sure that the motor assembly is clamped tightly together and
that the rotor spins freely, slide the motor assembly into the centre
housing (25) ensuring that roll pin (8) locates in the motor assembly and
in the hole in the bottom of the main bore of centre housing (25)
situated between the two main ports.
Reset the clutch as required and /or set the correct air pressure.
(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 seconds 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.
Page No 2
Safety Rules For A Screwdriver
1) Read all the instructions before using this tool. All operators must be
fully trained in its use and aware of these safety rules.
2) Do not exceed the maximum working air pressure.
3) Use personal safety equipment.
4) Use only compressed air at the recommended conditions.
5) If the tool appears to malfunction remove from use immediately and
arrange for service and repair.
6) If the tool is used with a balancer or other support device ensure that
it is fixed securely.
7) Always keep hands away from the working attachment fitted to the
tool.
8) The tool is not electrically insulated. Never use the tool if there is any
chance of it coming into contact with live electricity.
9) Always when using the tool adopt a firm footing and/or position and
grip the tool firmly to be able to counteract any forces or reaction forces
that may be generated whilst using the tool.
10) Use only correct spare parts. Do not improvise or make temporary
repairs.
11) Do not lock, tape, wire, etc. the on/off valve in the run position. The
trigger/lever etc. must always be free to return to the 'off' position when
it is released.
12) Always shut off the air supply to the tool, and depress the
trigger/lever etc. to exhaust air from the feed hose before fitting,
adjusting or removing the working attachment.
13) Check hose and fittings regularly for wear. Replace if necessary. Do
not carry the tool by its hose and ensure the hand is remote from the
on/off control when carrying the tool with the air supply connected.
14) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc. This will cause the body to be
drawn towards the tool and can be very dangerous.
15) It is expected that users will adopt safe working practices and
observe all relevant legal requirements when installing, using or
maintaining the tool.
16) Do not install the tool unless an easily accessible and easily operable
on/off valve is incorporated in the air supply.
17) Take care that the tool exhaust air does not cause a problem or
blows on another person.
18) Never lay a tool down unless the working attachment has stopped
moving.

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Distributor
Notes
Page No 4
Accessories
19) Always ensure that the reverse button is in the selected position
before starting the tool.
20) Do not use bits or sockets with excessive wear to the input and
output drives. Make sure the bit, socket, extension is firmly fixed to the
tool.
21) 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 is loosened and rides up
the thread moving the tool with it.
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 UT8961 Lever Start-Auto Shut Off Angle Screwdriver, 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
Place and date of issue Name and signature or equivalent marking of authorised person
Lane End Arthur Paterson (Operation Director)
This document may not be copied wholly or in part by anyone without the consent of the Directors of Universal Air Tool Company Limited
©Copyright of Universal Air Tool Company Limited, established in the United Kingdom, 1994
Designed & Written in the U.K.