HOWA MACHINERY H3EF, Инструкция по эксплуатации, Страница: 45 / 52

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4.2 Disassembly and Cleaning
Even with proper lubrication, fine chips or scale can enter the chuck to jam the area of the jaw
guide or wedge plunger, thus preventing smooth operation. Disassembly and cleaning must be
done on a regular basis every 1000 hours. When doing so, inspect carefully for parts wear and
breakage, replacing as necessary.
4.2.1 Disassembling Procedure
For safety reasons, use suspender belt and eyebolt to prevent the chuck from falling off.
(1)
Remove the top jaws.
(2)
Remove the accessories such as stopper on the front surface of the chuck.
(3)
Remove the chuck mounting bolt, turn the connecting rod counterclockwise to remove the
chuck from the machine bed.
(4)
Turn over the chuck and place it on the working table.
(5)
After removing the back plate mounting bolts, remove the back plate.
(6)
Lie the body down on the working table.
(7)
Remove the bolts and keys for positioning the draw bars. Keys are pulled out using a M4
bolt.
(8)
Slip a bolt into the jaw mounting screw, and then turn the draw bar 90
°
to CCW direction
using hexagonal wrench. In this condition, the draw bar can be pulled out from the draw
sleeve and chuck body.
(9)
Remove the guide bar.
(10)
Remove the draw sleeve.
Removing of draw bar
(1)
Position the draw sleeve at the front end.
(2)
Remove the top jaw.
(3)
Remove the bolts and keys for positioning the draw bars. Keys are pulled out using a M4
bolt.
(4)
Slip a bolt into the jaw mounting screw, and then turn the draw bar 90
°
to CCW direction
using hexagonal wrench.
In this condition, the draw bar can be pulled out from the draw sleeve and chuck body.
4.2.2 Assembling Procedure
Assembling is opposite way to disassembling procedure. Be
careful not to harm O-rings.
Fitting number to the chuck body is stamped on the key. Fit the
number to that of chuck body. Fitting number is to be positioned
to the front face of chuck body.
If the chuck interior becomes jammed with chips, the gripping
force will decrease or the jaw stroke will become short. If cutting is
performed under such a condition, the work piece may be
disengaged from the chuck, causing severe injury or death to the
operator and/or bystanders.
Fig.18
WARNING