Universal Air Tools UT5964 User Manual

A

Operator Instructions Important

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

Manufact urer/Supplier Product Type

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

Tel No Fax No

(01494) [phone]

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

Pistol Rev. Screwdriver

djustable Clutch

Model No/Nos Serial No

UT5964

RPM

1,800

Cycles Per

Product Net t Weight Recommended Us e Of

2.70

1.23

Recommended Working
Recommended Minimum
Maximum

Perso n a l Sa fe t y E q ui pm en t
Use - Safety Glasses
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors

lbs

Balancer Or Su pport

Kg

Air Pressure

6.3
n/a

7.0

bar
bar
bar

No

Yes

90

n/a

100

PSI
PSI
PSI

Foreseen Use

This screwdriver is des igned for th e tightening an d 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
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 recomme nded that th e tool is used wh en
standing on a s olid floor. It can be used in othe r positions,
but before any such use the operator must be in a secure
position hav ing a firm grip a nd footing. T he opera tor m ust
adopt a firm grip sufficient to resist the torque rea ction of
the tool, i.e. th e t ool 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 rear-
ward movement to avoid hand
entrapment. The operator must
also make all owanc e that i f
the tool does turn in the hand,
the hand is not trapped
against a ny rigid object.

Recommended Hos e Bore

Size - Minimum

3/8 10 30 10

Ins M/M Ft M

Noise

Sound Pressure Level 88.0 dB(A)

Recommended Ma x.

Hose Length

Sound Power Level 100.0 dB(A)

Test Met hod

Tested in accordance with

Pneurop test code PN8NTC1 and ISO

Vibration

Test Met hod

Tested in accordance with ISO

3.7

Metres / Sec²

standards 8662 Parts 1 & 7

Putting Into Service

Air Supply

Use a c lean lubricat ed air supply that w ill give a measu red
air pressu re 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
conne cted to the a ir supply as s hown 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 sh ould be lubricated. It is stron gly rec ommende d that
an air filter, regulator, lubrica tor (FRL) is us ed as sh own in
Figure 1 as this will supply clean, lubricated air at the correct
pres sure t o th e too l. Deta ils of s uch eq uipm ent ca n be
obtained from your su pplier. If such equipme nt is not used
then the tool should be lubricated by shutting off the air
supply to the tool, depres su risin g the line by pre ss ing the

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trigger on the tool. Disconnect the air line and pour into the
intake bus h ing a tea s poonful (5ml) of a su itable pneu ma tic
motor lubricating oil preferably inc orporating a rust inhibitor.
Reconnect tool to air supply and run tool slowly for a few
second s t o al lo w ai r to ci rcul at e th e o il . I f to o l i s u sed
frequen tly lubricate on daily bas is and if tool starts to slow
or lose power.
It is recommende d that the air pressu re 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 press ure of 100 p.s.i./7.0 bar.

Operating

Select th e corre c t sc re wdrive r bit or fa sten er drive r to s uit
the screw or fastener to be tightened or loosened. Slide
back the sleeve (4) and insert appropriate drive bit.
Model UT5964 has an adjustable clutc h so that the torque
applied to the fastener can be adjus ted to give the required
tightnes s within the torqu e range of the tool. To set the tool
to give a particular torque output, first remove the clutch
housing - left ha nd threa d and pull ou t the c lutch a ssembly
being careful not to lose guide pin and spring (23) and (24).
Hold the clutch carrier or insert a 1/4 hex Allen key in cam
spindle (14) and with a spanner rotate adjustment nut (7)
until it just touches sleeve bearing (6). This is the clutch set
at its lowest output le vel. Reassemble the tool, try it on the
joint to be fas tened. If more torque is required to place the
fastener repeat the process but rotate the adjustment nut
(7) until there is a gap betwe en it and the sleev e bearing
proceeding at a pproximately one turn of the nut a t a time
until the corre ct tightness is ac hieved. If too high a setting
is rea ched rotate th e a djustmen t nu t back a pa rt of a turn
at a time.
If the a djustm en t n ut (7) is rotate d too far a long th e c a m
spindle (14) it is possible that the clutch will not slip and a
reaction torque against the hands will be felt. In this situation,
if th e fastene r is no t suffi cient ly tig htened or canno t be
loosened then the tool in adjustable clutch mode has
insufficient capacity. Select a more powerful tool. The person
setting up th e tool must be awa re of this torque reaction at
high settin g levels of the clutc h 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 awa re of the nee d to resist the torque re action
of the tool. Further adju stm en t of adjustin g nut (7) 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 un til the tool fails to operate.
It must also be u nderstood that even if the clutch is set to
slip it may not do so if the s upply air pressu re falls below
the pr e ss ur e a t wh i ch t he cl ut c h w as set. It i s t h er ef ore
strongly re commended that a pressure control v alve is used.
Information as to suitable equipment can be obtained from
your supplier.

Dismantling & Assembly Instructions

Disconnect tool from the air supply.
Grip the tool in a vic e fitted with soft jaws on h ousing (36)
and unscrew (left hand thread) clutch housing (5) from internal
gear (22). Pull out clutch assem bly being care ful not to lose
spring guide (23) and spring (24). Grip the clutch assembly
and with a ne edle pointed tool prise out reta inin g ring (1)
and remov e washer (2) spring (3) and ball retaine r (4) being
carefu l not to los e sc rewdrive r bit reta ining ball (13). Aga in
with a ne edle pointed tool remove secon d retaining ring (1)

and pu l l off sl eev e b ea r i ng ( 6 ) . Un screw adjusting nut (7 )
and pull off was her (8), c lutch s pring (9) and wa sher (10).
Remove fr om v ice a nd ta p th e front en d to re move 4 off
balls (11). Remove retaining ring (15) and separate cam
spindle (14) from clutch carrier (12). Remove a third retaining
ring (1) and pull off drive dog (16).
Unscrew internal gear (22) from housing (36). Grip the internal
gear (22) and push out the internal gear assembly and
separate bearing (21), 3 off planet gears (26) and gear carrier
(25) with 3 off pin s. Do n ot rem ove th e 3 off pin s. Drive
out pin (37). Drive out pin and unscrew set screw to be
able to pull off trigger (47) and remove v alv e s pring (46).
Gri p thro ttle v alve (4 0) and pull out the co mpl ete valv e
asse mbly. Separate re verse va lve (43) with ball (44), O-ring
(42), reverse valve bushing (41), O-ring (39), throttle valve
(40) and O-ring (38). O-ring (39) may be taken off of throttle
valve (40). Uns cre w a ir in let (51) an d remove tw o sc rew s
(50) and take out exhaust diffuser (49). Carefully grip the
splined end of the rotor (29) and pull out the complete motor
assembly from housing (36). Remove pin (32). Remove
retainin g ring (28P) and grip bearing case (28) and with a
non met allic or soft meta l (lead or alum inium) h amme r tap
the spline d end of rotor (29) to drive it through bearing (27)
and bearing case (28). Remove cylinder (31) and 4 off rotor
blades (30) from rotor (29). Support the cylinde r side face
of end plate (33) and tap the non splined en d of the rotor
(29) to separate it from end plate (33) and bearing (34). Tap
out bearing (27) from bearing case (28).

Reassembly

Clean all components and examine for wear. Look in
particula r for cuts on O-rings and we ar on rotor blades and
clutch parts. Replace parts only with parts obtained from the
manu facturer or a n authorised dis tributor. Coat all parts w ith
a pneumatic tool lubricating oil and grease all bearings, gears
and clutch parts with a molybdenum or lithium based general
purpose greas e and reassem ble in the re verse order. Before
reassembling make sure that the faces of end plates (28)
and (33) that abut cylinder (31) are flat and free from burrs
and su r f ace m ar ki n g . I f nec es sa ry lap on a f lat very fine
grade of abrasive paper. When refitting the comple te motor
assembly in the housing (36) first make sure the assembly
is clamped tightly together and the rotor (29) spins freely.
Sli de the ass embly wi th pin ( 32) i nto the ho using ( 36)
ensuring that the motor locating pin (32) locates in the hole
in the bottom of the main bore of housing (36) situated
between the two main ports. Reassemble in the reverse
order.
Reset the clutch and/or the air pressure as required - see
Section Operating.

Safety Rules For A Screwdriver

1) Read all the instructions before using this tool. All operators
must be fully tra ined in its use and aware of these sa fety
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) I f the too l appea rs to mal functio n remove f rom 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 ke ep ha nds awa y from th e work ing attac hm en t
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 u sing the tool a dopt a firm footing and/or
position and grip the tool firmly to be able to counteract
any force s or reaction forces th at may be genera ted whilst

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