Universal Air Tools UT8777 - Manual (Page 2)

Operating
The tool can be fitted with conventional coated abrasive discs or
abrasive discs that are suitable for surface preparation, particularly
paint surfaces, where paint surfaces may be cleaned, surfaced or
paint runs or uneven patches removed or smoothed.
Three types of abrasive discs are available for the tool. The disc
coloured green is grade 50, yellow is grade 80 and white is grade
120 where the lower number grade, i.e. 50 is for fast material
removal and 120 is for smoother, finer finish. Select disc as required
and grip disc holder (25) and screw on disc (26) tightly by hand. Do
not overload the tool and let the abrasive work. If required the speed
and power of the tool may be reduced by turning air controller (9)
with a screwdriver.
As it is possible that during use small pieces of the disc may break off
and dust may be created, it is important to wear personal protection.
Always use protective glasses and or face shields. Use also protective
aprons, gloves and dust extraction systems as appropriate.
Dismantling & Assembly Instructions
Disconnect the tool from the air supply.
If fitted first remove exhaust and inlet hose assemblies.
Grip disc holder (25) and unscrew and remove attachment (26) as
fitted. Grip housing (3) in a vice fitted with soft jaws and unscrew air
inlet with screen (28) and pull out exhaust sleeve (27) with O-Ring
(29). Drive out spring pin (2) and take off safety lever (1). With a wide
bladed screwdriver unscrew valve screw (12) with O-ring (11) and
take out air controller(9), O-ring (10), valve spring (8), valve stem (6)
and O-rings (5) & (7). Do not press out valve bushing (4) from housing
(3) unless a replacement is required. Unscrew lock ring (24) from
housing (3) and pull out disc holder (25) with the complete motor
assembly from housing (3). Grip rear end plate (14) and tap the non
threaded end of rotor (17) to drive rotor (17) through rear end plate
(14) assembly. Take off cylinder (16) noting how pins (15) located in
rear end plate (14) and front end plate (21) locate the cylinder to the
end plates via the narrow length wise slot in cylinder (16). Take out 4
off rotor blades (18) from rotor (17). Carefully grip rotor (17) and
unscrew disc holder (25). Pull off front end plate(21) assembly with
collar (19) and steel plate (20) from rotor (17). Tap out bearing (22)
from front end plate (21).
Reassembly
Clean all parts and examine for damage and wear. Replace any parts
with parts obtained from the manufacturer or an authorised
distributor. Assemble in the reverse order.
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.
If tool is used daily then every other day grease gears (27) & (32) via
grease plug (40).
Page No 2
Safety Rules When Using A Paint
Surfacing 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) Always select suitable abrasive to use with this tool - see Operating
Instructions.
3) Always shut off the air supply to the tool and depress the lever to
exhaust air from the feed hose before fitting, adjusting or removing the
mounted point.
4) Always adopt a firm footing and/or position before using the tool.
5) Use only correct spare parts.
6) Check hose and fittings regularly for wear. Do not carry the tool by
its hose.
7) Do not remove and never tie down the safety lever.
8) Never exceed the maximum air pressure and check the free
running speed frequently. Have air regulator fully open.
9) Use safety equipment as recommended.
10) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc.
11) Use only compressed air at the recommended pressure.
12) Do not attempt to fit any other attachment than those
recommended - see “Foreseen Use of Tool”
13) If the tool appears to malfunction remove from use immediately
and arrange for service and repair.