Universal Air Tools UT3DC - 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.
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 bar.
Operating
Select a suitable abrasive disc (see Section "Foreseen use
of the tool") and make sure that it is fixed securely to the
tool. Connect to suitable air supply as recommended. Make
sure that the side handle is tightened securely.
Apply the sander lightly to the work and allow the abrasive
disc to cut. Take great care when sanding around sharp
edges and surfaces to avoid the disc snagging i.e. the disc
may be brought to an abrupt stop or considerably slowed
that will cause the tool to kick in the hands.
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 machine
has a low noise level the actual sanding process may cause
a noise level such that ear protectors will be required. If
there are sharp areas on the material being sanded safety
gloves are recommended.
Do not continue to use abrasive discs that are worn or
clogged. This will make the sanding process inefficient and
the need to apply unnecessarily high forces to the tool.
Do not use undersized or oversized sanding discs. The disc
should be no more than 1/4" larger in diameter that the
pad, and not smaller than the pad.
Dismantling & Assembly Instructions
Disconnect tool from air supply.
For Model with dust control
Insert spanner provided between pad (1) and suction cover
(2) to retain drive shaft so that pad (1) may be unscrewed
and removed. Unscrew adaptor (66) with washer (65) from
back of handle (59). Unscrew suction joint (64) from hose
joint (62) thus releasing set plate (63). Unscrew jubilee clip
(3) and slide off suction cover (2) and hose (61) assembly.
From this point on, the assembly and
dismantling instructions are the same
for both Models with and without Dust
Control.
Unscrew 2 off screws (40) and remove motor cover (51)
with muffler (49) and muffler element (50). Muffler (49) can
be removed from motor cover (51) for cleaning if required.
Do not remove muffler element (50) from motor cover (51).
Remove screw (15) and lockwasher (14) with fixing screw
(16) to remove hub assembly items (4) to (18) inclusive. To
dismantle hub assembly unscrew capscrew (4) and pull off
spring washer (5), balance nut (6), drive cover (7) and wave
washer (8). Remove circlip (9) and washer (10). Tap out
bearing (12), sanding pad standard nut (11), wave washer
(17) and front screw (18) from rear of random balance body
(13). Grip sanding pad standard nut (11) and unscrew front
screw (18) to free ball bearing (12) and wave washer (17).
Unscrew 4 off rotor screw (33) complete with spring washers
(32) to remove rotor fixing cover (31). Pull out rear plate
(30) complete with ball bearing (22) and bearing shield (27).
Press out ball bearing (22) from rear plate (30). Pull out pin
(29) from cylinder (28). Tap out rotor shaft (21) through
centre hole in valve body (19) to remove the remainder of
the motor assembly. This will free cylinder (28).
Remove set screw (25) through rotor (24) and pull off rotor
(24) off of rotor shaft (21) noting the flat on rotor shaft (21)
which set screw (25) locates on for reassembly. Take out
5 off rotor blades (26) from rotor (24). Pull off shims (23)
from rotor shaft (21). Tap out rotor shaft (21) from front
plate (20) and tap out rotor shaft (21) from ball bearing (22).
Remove bolt (55) and nut (56) to remove lever booster (54).
Remove retaining ring (37) to remove plate washer (38) and
rubber washer (39). Unscrew screw (46) with lockwasher
(45) to remove regulator switch (44). Tap out regulator valve
(43) with 2 off O-rings (41) and O-ring (42). Unscrew 2 off
screws (52) to release lever bracket (53). Take out throttle
valve plug (34) from valve body (19) to remove throttle spring
(35), O-ring (36) and push rod (47). Do not remove valve
body bushing (48) from valve body (19) unless a replacement
is required. Hose adaptor (59) may be unscrewed from valve
body (19) to release valve lever (57) and lever jam nut (58)
and handle (60) may be pulled off of hose adaptor (59).
Reassembly
Clean and examine all parts for damage and wear. Replace
any worn or damaged parts with parts supplied by the
manufacturer or an authorised representative. Coat all parts
in a pneumatic tool lubricating oil, one preferably containing
a rust inhibitor, pack all bearings with a lithium based general
purpose grease and reassemble in the reverse order. Check
operation, air regulator and sanding before returning to service.