Universal Air Tools UT8764 - Manual (Page 2)

Page No 2
Safety Rules For A Sander
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.
Operating
Select a suitable abrasive belt of the required grade to achieve
a fine sanded finish or high metal removal. The belt size for this
tool is 10 mm wide x 330 circumference (continuous belt) and
is available in various grades, the lowest is grade 40 grit which
is coarse for high material removal and grits are available as 40,
50, 60, 80, 100 and 120. The coarseness of the grit decreases
as the grade number increases, hence 40 is coarse and 120
very fine.
To fit a belt, press down the stopper and push the idle pulley
towards the tool until the stopper clicks into place which
releases the tension and holds the tension off the belt. Fit the
belt ensuring that it sits centrally on the drive pulley and the idle
pulley. Release the stopper to tighten the belt. Start the tool
slowly and use the adjusting screw(33) to align the belt centrally.
Apply the sander lightly to the work and allow the belt to cut.
Take great care when sanding around sharp edges and corners
to avoid snagging and belt damage or breakage. It is always
recommended to use safety glasses and a breathing mask. The
sanding of certain materials may create a hazardous dust which
may require special breathing equipment. Check before using
the tool.
Even if the tool has a low noise level, the actual sanding process
may create a noise such that hearing protectors should be worn.
If there are sharp edges on the material being sanded then
safety gloves are recommended.
Do not continue to use belts that are clogged or worn as this
will make the sanding process inefficient and the need to apply
unnecessarily high loads to the tool.
Only use belts of the dimensions specified. To use an incorrect
belt will either cause it to break or fly off. Both occurrences
could be dangerous.
Dismantling & Assembly Instructions
Disconnect tool from air supply
Press down stopper (28) to reduce tension on abrasive belt and
push on idle pulley (41) to remove abrasive belt. Remove screw
(33) and take off shoe (32). Tap out pulley pin (43) and this will
release idle pulley assembly. Tap out 2 off bearings (42) from
idle pulley (41).
Prise out pulley cap (25) and pull out apron (27). Unscrew screw
(33), drive out pin (37) and remove adjust arm (38) and spring
(39). Drive out stopper pin (36) and pull out tension arm (35)
and spring (34). Drive out pin (30) and take off stopper (28) and
spring (2).
Insert a rod in the hole in drive pulley (22) to prevent rotation and
remove nut (24) and washer (23). Take off drive pulley (22).
Take out adjust screw (31) to be able to remove wheel cover
(26).
Unscrew inlet bushing (11) and take out deflector (10). Drive out
lever pin (9) and remove throttle lever (8).
Unscrew motor nut (12) from motor housing (1) with o-ring (13).
Tap carefully [so as not to damage the thread] rotor (17) to
remove the motor assembly from motor housing (1). Note how
drive pulley (22) locates on pin (19) in rotor (17). Pin (19) can be
taken out of rotor (17). When removing the motor assembly
note how pin (44) in cylinder (16) locates the motor assembly in
the groove in motor housing (1) and is located at the rear plate
(15) end. Hold motor assembly and again tap the threaded end
of rotor (17) to drive rotor (17) through front plate (20) and
bearing (21) assembly. Tap out bearing (21) from front plate
(20). Take off cylinder (16) and 4 off rotor blades (18). Support
the rear end plate (15) in a piece of tube just slightly larger than
the maximum diameter of the rotor and tap the non threaded
end of the rotor (17) to drive the rotor (17) through the rear end
plate (15) and bearing (14) assembly. Tap out bearing (14) from
rear end plate (15). Unscrew valve body (7) and take out o-rings
(6) and (5), valve stem (4) with o-ring (3) and spring (2).
Reassembly
Clean all parts and examine for wear, particularly o-rings,
bearings and rotor blades. Use only distributor or manufacturer
supplied spare parts. Pack all bearings with a general purpose
grease and reassemble in the reverse order. Refit belt and adjust
alignment using screw (33).