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Page No 2

Safety Rules For A Saw

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.

Operating

To fit saw blade (35) first remove screw (38) and pull back cover (26).
Slacken 2 off screws (30) and push blade with the widest end into
blade chuck (33) as far as it will go and tighten 2 off screws (30), pull
back cover (26) and replace screw (38). Connect tool to suitable air
supply. Let the saw blade cut and never load the tool too heavily as
this may cause the blade to break. This tool has a high vibration level
and should only be used for short periods of time before resting.

Dismantling & Assembly Instructions

Disconnect tool from air supply.
Unscrew screw (38) and pull back chuck cover (26) and take out 2
off screws (21) to remove bridge (41) and 2 off blade guides (40).
Note the orientation of the blade guides in relation to the assembly for
refitting. Unscrew 2 off set screws (30) to remove the blade (35). Take
out grub screw (46). Locate a 7mm spanner on the flats of the piston
assembly (29) and unscrew blade chuck (33) from piston assembly
(29). Take out spring (45). Remove 2 off set screws (24) and pull out
work guide (34).
Remove 4 off cap screws (10) together with 4 off lock washers (11)
and take off the back end control assembly. Hold assembly in a vice
and drive out pin (12) to remove safety throttle lever (13). Unscrew
inlet bushing (9). With a wide bladed screwdriver remove valve screw
(1) with O-ring (2) and take out air controller (4) with O-ring (3). Take
out spring (5) and valve stem (6) with O-ring (7), Do not remove brass
bush (8) from valve block (23) unless a replacement is required. Take
off gasket(22). Grip housing (28) and tap the front end of piston
assembly (29) to drive it out of the rear end of the housing (28).
To dismantle the piston assembly grip with a 7mm spanner the flats
on piston assembly (29) and unscrew cap screw (21) with washer
(20). Pull out piston from valve case (15). Push actuate valve (19) from
rear of valve case (15). Do not remove valve sleeve (18) and 2 off pins
(14) from valve case (15).
Pull out rear bumper (43) from valve case (15). Cylinder (17) may be
pressed out from front end if it or the front bumper (42) needs to be
replaced. Bushes (25) may be pressed out of housing (28). If chuck
cover (26) needs to be replaced tap pins(44) - 2 off and these will
pass into the chuck cover. It will be necessary to use 2 off new pins
(44) to fit the new chuck cover.
Screw (38) is retained to prevent loss of screw by clip (37).

Reassembly

Clean all parts and examine for wear. Use only distributor or
manufacturer supplied replacement parts. Look for wear on seals and
bearing. Coat all parts with a pneumatic tool lubricating oil preferably
one containing a rust inhibitor and reassemble in the reverse order.
Make sure the saw blade is correctly fitted.

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.

Summary of Contents for UT8920B

Page 1: ...s sure at the tool of 90 p s i 6 3 bar when the tool is running with the trigger fully depressed Use recommended hose size and length It is recommended that the tool is connected to the air supply as shown Tel No Fax No 01494 883300 01494 883237 Vibration Level Test Method Tested in accordance with ISO standards 8662 Parts 1 12 22 6 Noise Level Sound Pressure Level 79 0 dB A Test Method Tested in ...

Page 2: ...d screwdriver remove valve screw 1 with O ring 2 and take out air controller 4 with O ring 3 Take out spring 5 and valve stem 6 with O ring 7 Do not remove brass bush 8 from valve block 23 unless a replacement is required Take off gasket 22 Grip housing 28 and tap the front end of piston assembly 29 to drive it out of the rear end of the housing 28 To dismantle the piston assembly grip with a 7mm ...

Page 3: ...r 18 900216 Valve Sleeve 19 900217 Actuate Valve 20 900218 Washer 21 900219 Cap Screw 3 22 700122 Gasket Ref No Part No Description 23 700123 Valve Block 24 900222 Set Screw 2 25 900223 Bush 2 26 900281 Chuck Cover 28 700124 New Housing 29 900227 Piston Assembly 30 900228 Set Screw 2 31 900282 Service Wrench 2mm 33 900284 Blade Chuck 34 900232 Work Guide Long 900289 Work Guide Short 35 H0403 Blade...

Page 4: ...her normative document s EN792 Draft EN292 Parts 1 2 ISO 8662 Parts 1 12 Pneurop PN8NTC1 following the provisions of 89 392 EEC as amended by 91 368 EEC 93 44 EEC Directives Place and date of issue Name and signature or equivalent marking of authorized person Lane End D H Moppett Man Director This document may not be copied wholly or in part by anyone without the consent of the Directors of Univer...

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