Lagler HUMMEL, Operation Maintenance Safety

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EXCHANGING THE TENSIONING ROLLER
If the sanding drum is too stiff to move, use a wooden lever
(see Fig. 41) to dislodge it, so as not to damage the machine.
Never attempt to loosen the sanding drum by hitting with a
hammer!
6 Clean the shaft stump and oil it slightly.
7 Push on the new roller, paying attention to the fitting keys.
8 Perform the remaining assembly steps in reverse order.
6.6.2 EXCHANGING THE TENSIONING ROLLER
Use exclusively original LÄGLER tensioning rollers (Art. no. in Sec-
tion 10) . However first remove the drive unit as described in Section
6.1.1 . Then proceed as follows:
1 Clamp the drive unit in a vise and release the two fixing
screws in the tensioning roller, holding onto the locknuts with
a closed-mouth wrench. If you are unable to reach the lock
nuts with the closed-mouth wrench, screw the lever into the
crank again and turn it downwards so that the top of the drive
unit is lifted up (Fig. 42).
2 Remove the tensioning roller and check the compression
spring. Should this be deformed, the compression spring (Art.
no. in Section 10) must be renewed.
3 Clean the drive unit.
4 Insert the compression spring in the tensioning roller. Ensure
that the surfaces on the shaft ends of the roller are pointing
upwards (Fig. 43)! Tighten the screw of the unsprung bearing
pedestal side (Fig. 44).
5 Turn the screw on the sprung side of the tensioning roller far
enough so that the tensioning roller is positioned parallel to
the upper part of the drive unit (Figs. 44 and 45).
6 Tighten the lock nuts of the fixing screws.
7 Remount the drive unit as described in Section 6.1.1.
8 Check belt tracking as described in Section 6.3.
Fig. 42 Back out the hexagonal socket head screws
while holding on to the lock nuts with the closed
mouth wrench. If necessary, turn the crank in the
indicated direction.
Fig. 43 Insert the new tensioning roller, ensuring that
the surfaces on the shaft ends are pointing up-
wards.
Fig. 44 Tighten the side without spring (1) and then the
side with spring (2), so that …
Fig. 45 … the tensioning roller is positioned parallel to
the top of the drive unit.
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