9 Maintenance
Operations Manual
Bison 120
20-07-2018
Page 9-24
Revision 2.0
(2) Belt Tracking
NOTICE
Conveyor belts must be fitted by qualified and competent suppliers only.
Oblique travel may cause fast deterioration of the belt. In order to assist you we have compiled
some of the reasons for oblique travel with appropriate remedies.
Reasons for Oblique Travel Remedies
Examples of Oblique Travel
1. Insufficient aligning of
drums and Idlers
a. Align all drums, carrying
idlers and return idlers at
right angles to the travelling
direction of the belt.
b. Check that all drums and
idlers are level to each other.
Fig.1 Turning carrying idlers
If a & b are as above then
carry out the following.
Adjustments are made as
indicated on Figs. 1, 2 & 3 by
turning drums and carrying
idlers in direction of arrow
until the belt is running
straight and centred on the
conveyor.
Fig.2 Turn drums.
Also return idlers may
cause oblique belt travel
and therefore they must be
aligned at right angles to the
travelling direction of the belt
and after that adjustment can
be made.
Fig.3 Turning both drum and
carrying idlers.
2. Misalignment of frame.
Oblique travel can be
reduced by turning forward
outer carrying idlers 1-3
degrees in travelling direction
of the belt. See Fig. 4 if this
does not correct the oblique
travel then align the frame.
Fig.4 Turning forward
carrying idlers.
3. Material built up on drums
and idlers.
Clean idlers and drums.
Check belt cleaners and
replace if necessary.
Possibly change to more
efficient type.
Summary of Contents for Evoquip Bison 120
Page 2: ...EvoQuip 200 Coalisland Road Dungannon Co Tyrone BT71 4DR Telephone 44 0 28 8774 0701...
Page 208: ...Appendix A Operations Manual Bison 120 20 07 2018 Page A 2 Revision 2 0...
Page 219: ...Appendix C Operations Manual Bison 120 20 07 2018 Page C 5 Revision 2 0 c Main Wiring...
Page 220: ...Appendix C Operations Manual Bison 120 20 07 2018 Page C 6 Revision 2 0 d Relay Box...
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