Universal Air Tools UT8018A User Manual

Wrench

Includes - Foreseen Use, Work Stations, Putting Into Service, Operating,

Operator Instructions Important

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

Tel No

[phone]

Test Method

Tested in accordance with Pneurop

test code PN8NTC1 and ISO Standard 3744

Vibration Level

Test Method

Tested in accordance with ISO

8.8

Dismantling, Assembly and Safety Rules

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited

accessible place.

1/2 Sq Drive Ratchet

RPM

150

Cycles Per Min

Unit 8
Lane End Industrial Park
High Wycombe
Bucks

Model No/Nos Serial No

UT8018A

HP14 3BY

Fax No

[phone]

Product Nett Weight

4.4

2.0 3/8 10 30 10

Recommended Working
Recommended Minimum
Maximum

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

lbs
Kg

Air Pressure

Personal Safety Equipment

Recommended Use Of

Balancer Or Support

No

bar

6.3
n/a

7.0

bar
bar

90

n/a

100

Yes

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

Noise Level

PSI
PSI
PSI

Sound Pressure Level 94.0 dB(A)
Sound Power Level 106.0 dB(A)

standards 8662 Parts 1 & 7

Recommended Max.

Hose Length

Metres / Sec²

Foreseen Use Of The Tool

The tool is designed to be used only for the purpose of driving,
tightening and loosening of threaded fasteners, usually nuts and bolts,
when fitted with a suitable drive socket.
It is allowed to use suitable extension bars, universal joints and socket
adaptors between the square output drive of the ratchet wrench and
the female square drive of the socket.
Do not use the tool for any other purpose than that specified without
consulting the manufacturer or the manufacturer's authorised supplier.
To do so may be dangerous.
Never use the ratchet wrench as a hammer to dislodge or straighten
cross threaded fasteners. Never attempt to modify the tool for other
uses and never modify the tool even to be used as a ratchet wrench.

Work Stations

The tool should only be used as a handheld hand operated tool. It is
always recommended that the tool is used
when standing on the 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 and be
aware that when loosening fasteners the
tool can move quite quickly away from the
fastener being undone. An allowance
must always be made for this rearward
movement so as to avoid the possibility of
hand/arm/body entrapment.

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 oil preferably
incorporating a rust inhibitor. Reconnect tool to air supply and run tool

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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

Fit securely to the tool the socket or attachment required to perform the
operation. Ensure that the reverse button situated on the opposite side
to the square drive output shaft is in the correct position for tightening or
loosening the fastener.
The nut/bolt can then be run down the thread using the power drive of
the tool. When the tool stops the handle of the tool can be used as a
ratchet lever and operated to give the required tightness of the joint.
For loosening a joint the tool can be used in the reverse sequence.

Dismantling & Assembly Instructions

Disconnect tool from the air supply.
Grip the tool in a vice fitted with soft jaws on the flats at the rear end of
motor housing (1) and unscrew inlet bushing with screen (2) and O-ring
(47). Drive out spring pin (3) and take off lever (4). With a wide bladed
screwdriver unscrew valve screw (5) with O-ring (6) and from the lever
side push out valve stem (9), spring (7), O-ring (8), air regulator (49) and
O-ring (50). O-ring (8) may be removed from valve stem (9). Do not
press out bushing (45) unless a replacement is required. Remove circlip
(43) and by pushing on reverse button (34) and moving Yoke (33) from
side to side, the front end drive assembly may be removed from the tool.
Remove thrust washer (42), washer (51) and 2 off steel balls (27) and 2
off springs (40) from ratchet anvil (39). Do not remove the socket
retaining balls from ratchet anvil (39) unless replacements are required.
Tap out needle roller (35) and remove pawl (38), lock pin (37) and
spring (36). Pull out reverse button (34) but do not remove spring pin
(30) from ratchet anvil (39). Look through the slot in the side of ratchet
housing (28) and centralise the pin end of crankshaft (31) and it is then
possible to slide out from ratchet housing (28) the yoke (33) and drive
bushing (32). Pull out crankshaft (31). Unscrew clamp nut (21) with
ratchet housing (28) from motor housing (1). Unscrew ratchet housing
(28) from clamp nut (21) - left hand thread. Take out idler gear plate (25)
with three off needle rollers (26). It is now necessary to unscrew internal
gear (24) from motor housing (1) and this requires a special wrench
which locates in the teeth of internal gear (24). Seek advice from your
distributor or service depot. Remove washer (22). Carefully grip the
splined end of rotor (15) and pull out the motor assembly complete from
motor housing (1). Prise out bearing cap (10) from rear end plate (14).
Grip front end plate (19) and tap the splined end of rotor (15) with a soft
metal (lead or aluminium) hammer to drive the rotor (15) through front
end plate (19) assembly. Tap out bearing (20) from front end plate (19).
Take off cylinder (18) noting how it locates to rear end plate (14) via
spring pin (17). Remove 4 off rotor blades (16) from rotor (15). Support
the cylinder side of rear end plate (14) in a piece of tube with a bore
diameter as close as possible to the largest diameter of rotor (15) and
tap the non splined end of rotor (15) to drive it through rear end plate
(14) assembly. Tap out bearing (13) from rear end plate (14). Bearing
(23) and needle bearing (29) may be pressed out of ratchet housing
(28).

Reassembly

Clean all parts and examine for wear, damage etc. before reassembling.
Look in particular for wear and cracks on pawl (38), yoke (33), ratchet
anvil (39), drive bushing (32) and crankshaft (31). Check for wear on
rotor blades (16).
For the motor assembly ensure that the faces of front end plate (19) and
rear end plate (14) that abut cylinder (18) are clean and free from burrs.
If necessary lap these faces on a flat fine grade of abrasive paper.
Coat all parts with a pneumatic tool lubricating oil and grease all
bearings, gears and ratchet head parts with a lithium or molybdenum
based grease and assemble in the reverse order.
Note:- When servicing the tool it is good practice to replace springs (40)
and spring (36) if the reverse button slips or is inclined to slip.

Safety Rules For A Ratchet 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.

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 sockets with excessive wear to the input and output
drives. Periodically check the square drive on the ratchet wrench. Make
sure the 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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