Makita 6922NB Manual De Instrucciones página 6

Installing the outer and inner sleeves (Fig. 5 & 6)
Hold the inner sleeve with the pin facing upward. Place
the outer sleeve over the inner sleeve. Press the pin to
allow inserting the inner sleeve, then release the pin to
secure the inner sleeve.
Insert the outer and inner sleeves into the tool while
rotating the inner sleeve alternately clockwise and coun-
terclockwise until there is no gap between the outer
sleeve and the tool. See the figure. Then tighten the two
screws securely.
OPERATION
Bolt installation
Slip the tool onto the bolt so that the inner sleeve com-
pletely covers the bolt tip. (Fig. 7)
CAUTION:
• Be careful when fitting the sleeve onto the bolt tip. Strik-
ing the tip can damage it so that it will no longer fit
inside the sleeve properly.
• First tighten bolts preliminarily by using a hand wrench
and then tighten them with this tool. Use this tool only
after preliminary tightening without starting the tighten-
ing with this tool.
Keep forward pressure on the tool while sliding it further
forward until the outer sleeve fits completely over the nut.
If the tool fails to fit completely over the nut, twist the tool
slightly right and left while pushing forward. (Fig. 8)
Pull the switch trigger. The outer sleeve turns to begin
tightening the nut.
When the specified torque is attained, the bolt tip will be
sheared at its notched portion. The bolt tip will remain
inside the inner sleeve. (Fig. 9) Release the switch trigger and withdraw the tool in a
straight line. (Fig. 10)
CAUTION:
• Do not force the tool down excessively. Apply the down-
ward force to the degree just needed to hold the tool
firm.
Pull the tip ejector (tip lever) to eject the bolt tip from the
tool. Catch the sheared bolt tips to prevent them from fall-
ing dangerously below. Keep the tips off of the ground,
floor, walkways, etc. to prevent injury from tripping or fall-
ing. (Fig. 11 & 12)
CAUTION:
• Washer and nut have head and tail. Head has identifi-
cation mark for nut and chamfer for washer. When plac-
ing them, be careful not to place in reverse.
• Replace nut, bolt and washer all together at one time
when these rotate together, nut rotates excessively or a
bolt protrude from nut surface too much or less.
(Fig. 13)
• Do not reuse used nut, bolt and washer.
• Choose shear bolts according to the thickness of work-
piece to be fastened. Range for the remaining length of
bolts that are obtained after cutting off chips are deter-
mined by bolt size. Refer to the table below for details.
(Fig. 14)
6
Maximum
Bolt size
remainig length
M16
M20
M22
CAUTION:
• Use bolts with the remaining length within the range
shown in the table above as bolts with different size
have different maximum and minimum remaining
length. Be careful not to use bolts beyond the specified
range which causes the tool damage.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
Replacing carbon brushes (Fig. 15 & 16)
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Open the protector. Use a screwdriver to remove the
brush holder caps. Take out the worn carbon brushes,
insert the new ones and secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
Minimum
remainig length
20 mm 4.5 mm
15 mm 5.5 mm
14 mm 7 mm