
MAINTENANCE MANUAL
167
STE 85357
4)
Remove six (6) hexagon socket head bolts (M4 x 12) securing the ball screw nut,
and remove the ball screw nut from the axis 3 bracket. (Keep the hand wheel
removed.)
Remove the four (4) hexagon socket head bolts (M4 x 16) securing the axis 3
bracket.
5)
Hold the ball screw nut and the axis 3 bracket upward, and remove the axis 3
timing belt.
Fig. 4.34 Replacing axis 3 timing belt (THL800, THL900, THL1000)
6)
Hold the ball screw nut and the axis 3 bracket upward, and mount a new timing
belt.
7)
Temporarily clamp the axis 3 bracket on the arm 2 using four (4) hexagon
socket head bolts (M4 x 16).
8)
Fix the ball screw nut on the axis 3 bracket using six (6) hexagon socket head
bolts (M4 x 12).
9)
Move the ball screw in the vertical direction by ten reciprocating motions and
align the center. After that, while holding the axis 3 bracket to prevent it from
Axis 3 timing belt
Hexagon socket
head bolts
M4 x 12 x 6 pcs.
Hexagon socket
head bolts
M4 x 16 x 4 pcs.
Axis 3 bracket
Ball screw spline shaft