Universal Air Tools UT7X (7X) - 5.8 Stroke - Manual (Page 2)

Dismantling & Assembly Instructions
Disconnect tool from air supply
Grip handle (1) in a vice with soft jaws and unscrew either
retainer spring (21) or beehive spring (22). Spring off exhaust
cover (20) and remove stopper pin (19). This will allow cylinder
(2) to be unscrewed from handle (1). Remove piston (3) from
cylinder (2). The valve assembly comprising of valve box (5),
valve (6), valve seat (8) and pin (7) can be removed from the end
of the cylinder and separated, but carefully note the orientation
of the parts to the cylinder (2) for reassembly. Drive out lever
roller pin (15) and handle knock pin (16) and unscrew inlet
bushing (10) and plug (14) to allow lever (18), assistant lever
(17), valve stem(11), O-ring (12) and spring (13) to be removed
from the handle (1). Do not remove throttle bush (9) from handle
(1) unless a replacement is required.
Reassembly
Clean all parts and examine for wear. Replace any worn or
damaged components with parts supplied by the manufacturer
or an authorised representative. Coat all parts with a pneumatic
tool lubricating oil, one preferably containing a rust inhibitor.
Ensure correct location of valve parts to cylinder and tighten
cylinder until the stopper pin (19) can be located in one of the
slots in the handle (1) which mates with one of the holes in
cylinder (2). Assemble all other parts in the reverse order.
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) Never point a tool at any person.
20) Use only suitable pneumatic tool lubricants. This is important
as a safeguard against the “diesel effect” i.e. explosive mixtures
firing.
21) Chisels worn/blunt at the cutting edge or shank should not
be used as such conditions promote tool breakage, reduce
efficiency and increase vibration. A chisel which breaks can
cause injury by creating unexpected movement.
22) When chipping or scaling in potentially explosive
atmospheres use spark resistant chisels usually made of
beryllium copper. Consult the manufacturer of the tool standard
chisels about sources of supply.
23) Do not store chisels etc. at freezing and below freezing
temperatures. Freezing temperatures can make hardened-tool
steels brittle which can cause breakage and lead to injury.
24) Do not start tool until steel/chisel/rivet snap are in contact
with the working surface. Do not run tool unless retainer is fitted.
25) Always use tool with a whip hose as shown in fig 1.
26) Don’t over reach. Keep proper footing and balance at all
times.
27) Do not force the tool but allow it to cut.
28) When possible secure work with clamps or vice so both
hands are free to operate the tool.
29) Use only 0.498” diameter shank size chisels or adaptors.
30) Prolonged exposure to vibration can cause injury.
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
Operating
Connect tool to clean supply of compressed air at
recommended pressure. Select chisel/attachment to perform
the work task and ensure that the chisel retainer is securely
fitted. Do not use tool without retainer fitted. The power of the
tool may be controlled by the input air pressure. Always ensure
that the working tool is in contact with the workpiece before
pressing the trigger. Running the tool free will reduce tool life
by placing unnecessary high loads on tool retainers and
cylinders.
Safety Rules For A Percussive Air
Hammer
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