Operating
Select the correct screwdriver bit or fastener driver to suit the
screw or fastener to be tightened or loosened. Slide back the
sleeve (4) and insert appropriate drive bit.
This model of screwdriver has an adjustable clutch so that the
torque applied to the fastener can be adjusted to give the
required tightness within the torque range of the tool. To set the
tool to give a particular torque output, first remove the clutch
housing - left hand thread and pull out the clutch assembly being
careful not to lose guide pin and spring (23) and (24). Hold the
clutch carrier or insert a 1/4 hex Allen key in cam spindle (14)
and with a spanner rotate adjustment nut (7) until it just touches
sleeve bearing (6). This is the clutch set at its lowest output level.
Reassemble the tool, try it on the joint to be fastened. If more
torque is required to place the fastener repeat the process but
rotate the adjustment nut (7) until there is a gap between it and
the sleeve bearing proceeding at approximately one turn of the
nut at a time until the correct tightness is achieved. If too high a
setting is reached rotate the adjustment nut back a part of a turn
at a time.
If the adjustment nut (7) is rotated too far along the cam spindle
(14) it is possible that the clutch will not slip and a reaction torque
against the hands will be felt. In this situation, if the fastener is not
sufficiently tightened or cannot be loosened then the tool in
adjustable clutch mode has insufficient capacity. Select a more
powerful tool. The person setting up the tool must be aware of
this torque reaction at high setting levels of the clutch and that the
tool will try to turn against the hand. All that is required is a firm
grip.
The tool, when the stall torque position has been reached, can
still be used to set or loosen fasteners, provided the operator is
aware of the need to resist the torque reaction of the tool. Further
adjustment of adjusting nut (7) at this point will not increase the
output of the tool. The only thing that will affect the output is a
change in the air supply pressure. The output can be increased
up to the use of the maximum allowed supply pressure and
decreased with a reduction in supply pressure until the tool fails
to operate.
It must also be understood that even if the clutch is set to slip it
may not do so if the supply air pressure falls below the pressure
at which the clutch was set. It is therefore strongly
recommended that a pressure control valve is used. Information
as to suitable equipment can be obtained from your supplier.
When using the tool keep the screwdriver bit pressed firmly into
the screw head to avoid cam out and screw head damage.
Dismantling & Assembly Instructions
Disconnect tool from the air supply.
Grip the tool in a vice fitted with soft jaws on the pistol grip handle
and unscrew (left hand thread) clutch housing (5) from housing
(52). Pull out clutch assembly being careful not to lose spring
guide (23) and spring (24). Grip the clutch assembly and with a
needle pointed tool, prise out retaining ring (1) and remove
washer (2), spring (3) and ball retainer (4) being careful not to
lose screwdriver bit retaining tool (13). Again with a needle
pointed tool, remove a second retaining ring (1) and pull off
sleeve bearing (6). Unscrew adjusting nut (7) and pull off washer
(8),clutch spring (9) and washer (10). Remove from vice and tap
the front end of the assembly to remove the four off balls (11).
Remove retaining ring (15) and separate cam spindle (14) from
clutch carrier (12). Remove a third retaining ring (1) and pull off
drive dog (16). Unscrew housing (52) from pistol grip housing
(36) and separate internal gear (52), 3 off planet gears (58),
carrier (57), gear spindle (56), 3 off planet gears (55), ring gear
(54), carrier (53) and bearing (21). Do not remove the 3 off pins
in carriers (53) and (57).
Drive out pin (37). Remove screw (48) and pull of trigger (47).
Remove valve spring (46). Grip throttle valve (40) and pull out the
complete trigger valve assembly by first lining up reverse valve
lever with slot in pistol grip handle. Separate reverse valve (43)
with ball (44), rubber (45), o-ring (42), reverse valve bushing (41),
o-ring (40P), throttle valve (40) and o-ring (39). o-ring (38) may
be taken out of body (36). Unscrew air inlet (51) and remove 2 off
screws (50) and take out exhaust diffuser (49). Carefully grip the
splined end of rotor (29) and pull out the complete motor
assembly from housing (36). Remove pin (32). Grip front end
plate (28) and with a non metallic or soft metal (aluminium or
lead) hammer tap the splined end of rotor (29) to drive it through
front end plate (28) and bearing assembly. Remove cylinder (31)
and 4 off rotor blades (30) from rotor (29). Support the cylinder
side face of rear end plate (33) and tap the non splined end of
rotor (29) to separate it from end plate (33) and bearing (34). Tap
out bearing (22) from front end plate (28).
Reassembly
Clean all components and examine for wear. Look in particular
for cuts on o-rings and wear on rotor blades and clutch parts.
Replace parts only with parts obtained from the manufacturer or
an authorised distributor. Coat all parts with a pneumatic tool
lubricating oil and grease all bearings, gears and clutch parts with
a molybdenum or lithium based general purpose grease and
reassemble in the reverse order. Before reassembling make sure
that the faces of end plates (28) and (33) that abut cylinder (31)
are flat and free from burrs and surface marking. If necessary lap
on a flat very fine grade of abrasive paper. When refitting the
complete motor assembly in the housing (36) first make sure the
assembly is clamped tightly together and the rotor (29) spins
freely. Slide the assembly with pin (32) into the housing (36)
ensuring that the motor locating pin (32) locates in the hole in the
bottom of the main bore of housing (36) situated between the
two main ports. Reassemble in the reverse order.
Reset the clutch and/or the air pressure as required - see Section
Operating.
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.
Page No 2
Safety Rules For A Screwdriver
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,
