Dismantling & Assembly Instructions
Disconnect tool from the air supply.
Rotate chisel cover (20) until it is possible to see ball (18)
centrally positioned in the hole in the side of chisel cover (20)
and in this position it is possible to pull out the chisel (22).
Remove snap ring (21) and slide off chisel cover (20) and
remove ball (18). Four off o-rings (19) may be carefully prised off
of cylinder body(15). Prise off lockring (17) noting how it locks
via a tang located in a slot in cylinder cap (1) and a slot in the
end of cylinder body (15). Fix the chisel (22) in a vice and locate
tool on it using the square hole in the front of the cylinder body
and with a spanner located on the flats of cylinder cap
(1)unscrew the cylinder cap assembly. Note:- when
reassembling the tool, tighten cylinder cap (1) to cylinder body
(15). Make sure that the threaded joint is tight and that a slot in
the cylinder cap (1) lines up with a slot in the cylinder body (15)
so that the lockring (17) can be refitted by inserting the tang in
matching slots. Drive out spring roll pin (8) and take off throttle
lever (7). Unscrew throttle cap (6) and remove spring (5), throttle
rod (3) and O-ring (4) from throttle rod (3). Do not press out
throttle bushing (2) unless a replacement is required. Remove
valve assembly from cylinder body (15) and pull the valve
assembly apart to separate upper main valve (13), lower main
valve (12), main valve case (10), main valve(9) and 2 off pins
(11), carefully noting and recording for re-assembly how and
where the 2 pins (11) locate. Note also at this time to replace
the valve assembly into cylinder body (15) making sure that the
two holes in the side of upper main valve (13) locate to line up
with the two slots in the outer diameter of piston sleeve (16).
Remove piston (14). Do not press out piston sleeve (16) unless
a replacement is required.
Reassembly
Clean all parts and examine for wear and replace any worn or
damaged parts with parts obtained from the manufacturer or an
authorised distributor. Coat all parts with a pneumatic tool
lubricating oil and reassemble in the reverse order.
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) 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/needles 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.
into the air inlet a teaspoonful (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 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
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. 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.