MLS MMLS3, Operator'S Manual

Page: 40 / 48

MLS Test Systems Pty Ltd
Revised: April 2013
38
2.6 Refer to section 4 and measure the gap between the upper guide
rail ends and the drive drum. If a feeler gauge is not available,
use two layers of office paper. If the gap is not correct, adjust
the drum as described. Afterwards make sure that the Bearing
Slide Assembly (fig. 7) is still free to move in the horizontal
direction.
2.7 Check the drive belts.
Remove the safety cover from the drive mechanism on the side
of the machine after removing the two M6 bolts at the top and
the two at the bottom of the cover. Check the outer and inner
drive V-belts for wear and cracks. Check the tension of the
outer belt and adjust if necessary.
3. Every 5 million axles:
In addition to the above, do the following:
3.1 Inspect the upper guide rail ends (fig. 6)
If the ends are worn to a sharp or cracked edge that may damage
the guide wheels, they must be removed and ground or filed
back to a blunt, smooth edge, about 0.5mm thick. Use
sandpaper to smooth it, if necessary.
Because the guide rail ends serve as reference for the position of
the drive drum, they must be replaced in exactly the same
position from which they were removed. Before undoing the
nuts that hold a guide rail end, measure with a feeler gauge and
note the size of the gap between the drum and the guide rail end.
When the guide rail end is replaced later on, make sure that the
gap is exactly (+/- 0.1mm) the same as before
3.2 Inspect the Vesconite guide rails for wear.
(Most wear normally occurs at the upper guide rail ends (see fig.
6 in manual)). Refer to the left hand drawing in fig M3-4-14A
below. The Vesconite strips are fastened with screws and
washers in the vertical direction, as indicated. The danger is
that the Vesconite may be worn away so far that the wheels