Universal Air Tools UT5761 - Manual (Page 2)

Page No 2
Dismantling & Assembly Instructions
Disconnect tool from air supply.
Grip connector pipe (29) and unscrew head (30). Grip head (30) in
the vise and take off screw (55) and cutting wheel (63) flange (51)
retainer ring (50) and washer (37).
Undo 3 set screws (47 and pull off the cover seat (46). Unscrew
clamp nut (45) and pull out the gear assembly (26, 42, 36 and 33)
from the head (30).
Grip connector pipe (29) and unscrew from the connector nut (24)
take off clamp nut (25) decoration ring (23) and connector (22).
Pull out the motor assembly from the motor housing (1) them take
out the bearing (20) from the front end plate (19) and rotor bushing
(12) then pull off the cylinder (18) and remove the 4 rotor blades (16)
tap off the rear end plate (14) from the rotor (15) and take out the
bearing (13) from the rear end plate (14).
To remove the regulator first unscrew the air regulator (10) and take
out the o-ring (9) and valve spring (8).
To replace the valve o-rings (44, 43 and 7) first take out the valve shaft
(5) them pull out the valve bushing (21).
To replace the throttle lever (4) first take out spring pin (2).
Reassembly
Clean all parts and examine for wear and cracks, etc. and replace as
necessary. Look in particular for wear and cuts on O-rings, wear on
rotor blades and wear on bearings (26), (20), (33) and (30) . Make
sure that the faces of end plate (19) and (14) that about cylinder (18)
are flat and free from burrs. Lap on a flat fine grade of abrasive paper if
necessary. Use only manufacturer or authorized distributor supplied
spare parts. Lightly coat all parts with suitable pneumatic tool
lubrication oil and reassemble in the reverse order. On completing
assembly, ensure that all parts are locked tight and the spindle rotates
and the lever throttle. Connect tool to suitable air supply and operate
tool slowly for a few seconds and reset for operation required. Refer
to section on Operation Instructions.
Operating
The lever (11) is the on/off valve for the tool. Connect to a suitable air
supply and ensure that the air pressure, measured at the tool inlet, with
the tool running does not exceed 90 psi (6.3 bar). Select disc and
ensure that the disc is not cracked or damaged and that the speed
rating of the disc is in excess of 16,000 rpm. Using only the wheel
spacer (54) supplied with the tool, fit the disc and tighten wheel screw
(55) while holding flange (51). Do not over tighten as this could crack
the disc. Ensure wheel (63) is in place. When first starting the tool with a
new or changed disc the tool should be first started in a protected area
i.e. such as under a heavy bench and run for say a minimum time of one
minute. This will provide protection if the wheel should break because a
fault was not detected. Always use eye protection and wear protective
gloves if there are sharp edges in the working area. Remember that the
cutting process will generate heat and that cut parts, particularly small
items can get very hot and burn fingers if touched. Allow cut parts to
cool.
The tool and the work process may create a noise level such that ear
protectors should be worn. The cutting process will create dust and the
use of breathing masks is recommended. Check that the material being
cut will not cause harmful dust or fumes. If this is so then special
breathing apparatus may be required. Seek advice before starting work.
The cutting process will create sparks. Ensure that these do not create
a hazard to any person, object or process and are not directed near any
flammable materials or fluids. Do not use the cutter in explosive
environments. Do not apply excessive loads to the tool as this will
reduce the efficiency of the disc. Apply light loads and allow the wheel
to cut. Try always to keep the disc square to the cut. Do not apply side
loads or grind on the side of the disc.
Handle the cutter with care. If the cutter is dropped carefully examine
the disc for damage and replace if necessary. Start the tool as for the
first time of fitting a disc, i.e. under a bench. Make sure that the object to
be cut is in a firm fixed position.
Safety Rules For A Cut Off tool
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) A cutting wheel should only be fitted by a competent person trained
to do so. The wheel must be of the correct size and speed rating. Never
use tool with guard not fitted.
20) Check the speed of the tool at least once per week, if it is in regular
use, with an accurate tachometer.
21) The tool must only be used with the cutting wheels as set out in
section “Foreseen Use of the Tool” and shown on parts list. Never fit any
other device.
22) Carry out the instructions as set out in “Putting into Service”.
23) Many countries have local or national rules re the use and fitting of
cutting wheels. Make sure such rules are observed.
24) Use a barrier to prevent sparks causing a hazard to the operator,
any other person or anything within the vicinity of the sparks.
25) If a wheel guard becomes damaged or has withstood a wheel
breakage, the guard must be changed.
26) Do not use chipped or cracked cutting wheels.
27) Always wear impact resistant eye protection.
28) Use only washer (54) provided with the tool for locating and
clamping the wheel. Never use substitutes. Use the paper blotter fixed
to the wheel as this ensures even tightness when the wheel is secured.
29) Tighten the wheel plates sufficiently to prevent wheel spin off when
the tool is turned off. Do not tighten excessively as this may crack the
wheel.
30) The noise from the tool or the process noise of the cutting operation
may be such that hearing protection should be worn.
31) Avoid inhaling dust from the cutting process. Wearing of a
breathing mask is recommended. Cutting certain materials may mean
that special breathing precautions are necessary. Seek advice before
using the tool.
32) Always ensure that the work piece is firmly supported so that it