
MAINTENANCE MANUAL
180
STE 85357
Fig. 4.44 Dismounting ball screw spline unit (THL800, THL900, THL1000)
!
CAUTION
• When the ball screw nut integrated with the ball screw spline shaft is disconnected, take
utmost care not to cause the ball screw spline shaft to come off. Otherwise, the ball in the
ball screw nut will drop and the ball screw nut integrated with the ball screw spline shaft
cannot function any further.
9)
Remove six (6) hexagon socket head bolts (M4 x 12) securing the ball spline nut,
and pull out the ball spline nut downward.
If the ball spline nut is hard to remove, screw a bolt into the ball spline nut tap
(M4) to remove it.
10) Disconnect the axis 4 nut pulley secured to the ball spline nut with six (6)
hexagon socket head bolts (M5 x 12). When it is hard to disconnect, screw the
bolt into the tap for disassembly (M4) machined on the pulley and disconnect.
Stopper
Hexagon socket head bolts
M4 x 12 x 6 pcs.
Washer
Do not pull out.
Stopper
Stopper
Axis 3 bracket
Ball screw
spline shaft
Ball screw nut
Hexagon socket
head bolts
M4 x 12 x 4 pcs.