Universal Air Tools UT5825S User Manual

Operator Instructions Important

Includes - Foreseen Use, Work Stations, Putting Into Service, Operating,
Dismantling, Assembly and Safety Rules

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY

Tel No Fax No[phone] [phone]

Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.

Direct Drive Stall Torque
Screwdriver

Model No/Nos Serial No

UT5825-S

RPM

2,000

Cycles Per Min

Product Nett Weight Recommended Use Of

1.98

0.9

lbs
Kg

Balancer Or Support

No

Air Pressure

Recommended Working 6.3 bar 90 PSI

Recommended Minimum n/a bar n/a PSI

Maximum 7.0 bar 100 PSI

Personal Safety Equipment

Use - Safety Glasses

Yes

Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors

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.

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
operator 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
operator must also be aware that when loosening fasteners, the tool
can move quite
quickly away from the
fastener being un­done. An allowance
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.

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

3/8 10 30 10

Recommended Max.

Hose Length

Noise Level Sound Pressure Level 91.0 dB(A)

Sound Power Level 102.0 dB(A)

Test Method Tested in accordance with Pneurop
test code PN8NTC1 and ISO Standard 3744

Vibration Level

Less than 2.5

Metres / Sec²

Test Method 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 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 (5ml) of a suitable pneumatic motor lubricating

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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.

Operating

Select the correct screwdriver bit or fastener to suit the screw or
fastener to be tightened or loosened. Pull the knurled sleeve of slip
chuck forward and insert the appropriate bit.
This model does not incorporate an adjustable slip chuck to control
the torque output applied to the fastener. The only way to control the
torque output to the tool is to control the air pressure fed to the tool.
It is therefore recommended that this tool is used in conjunction with
a PRV (pressure reducing valve) that can be adjusted to vary the input
pressure. The lower the set input air pressure fed to the tool, the lower
the output torque. Your supplier can provide information on suitable
PRV's. To set up the tool to apply a particular torque to a fastener, first
lower the air pressure to say 2 bar (30 p.s.i.) and try the tool in the
application. If the joint is not tightened sufficiently then increase the air
pressure in say 0.5 bar (7.5 p.s.i) increments until the correct tightness
of the joint is achieved. Every time an increase in pressure is applied
start the joint from its loose condition and not to a partially tightened
joint. Do not set the tool to an air pressure in excess of 7 bar (100 p.s.i.).
Be aware that when using this type of "stall torque" screwdriver the
operator will feel a torque reaction on the hands. This must be
appreciated on the first use and the tool should be held sufficiently
tightly to resist this torque reaction but only grip the tool sufficiently to
resist the torque reaction. Do not "overgrip" the tool and be aware
that this torque reaction will increase with increase in air pressure.

Dismantling & Assembly Instructions

Disconnect tool from the air supply.
Unscrew gear housing (3) and remove the gearbox assembly
complete. Take out internal gear (8) and 3 off planet gears (7). If the
slip chuck has not previously been removed then wedge a
rectangular bar between the three pins in planet carrier (6) and then
by use of a 1/4 hex allen key unscrew slip chuck (2). Support the end
of gear housing (3) and carefully, so as not to damage the thread, tap
planet carrier(6) together with 2 off bearings (5) out of the gear
housing. Support the motor side of the outer rings of bearings (5) and
press planet carrier (6) through them. Grip the end of rotor (12) and
pull out the complete motor assembly from the motor housing (17).
Note at this time, for reassembly, how motor pin (14) locates the
motor assembly by locating in the rectangular slot in the bottom of the
main bore of the motor housing (17). Remove motor pin (14). Hold
bearing case (10) tightly by hand and tap the splined end of rotor (12)
with a non metallic [lead or aluminium] hammer so as not to damage
the splines and drive the rotor through the bearing case (10)
assembly. Tap out bearing(9) from bearing case (10).
Remove cylinder (15) and 4 off rotor blades (13). Support rotor (12)
in a piece of tube with a bore diameter as close as possible to the
maximum diameter of the rotor and tap the non splined end of the
rotor to drive it through end plate (11) assembly. Tap out bearing (9)
from rear plate (11).
Unscrew air inlet with air filter screen (31), remove 2 off screws (30)
and take off exhaust deflector (29). Prise off trigger (20) and remove
spring (21). Centralise the forward and reverse lever (24) so that it
aligns with the slot and pull out the valve assembly complete.
Separate the parts, i.e. reverse valve (24), o-ring (25), reverse valve
bush (26), throttle valve (22) and o-rings (23), (23a) and (27).

Reassembly

Clean all parts and examine for wear and replace any parts with parts
obtained from the manufacturer or an authorised distributor. Coat all
parts with a suitable pneumatic tool lubricating oil and reassemble in

the reverse direction. See Note.
Note:- Before reassembling the motor assembly make sure that the
faces of bearing case (10) and rear plate (11) that abut cylinder (15)
are flat and free from burrs. If necessary lap on a flat very fine grade
of abrasive paper.

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.

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.

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