7. M
AINTENANCE
H
I
R
OLLER
- B
ELT
C
ONVEYORS
7.7. H
EAD
& D
RIVE
P
ULLEY
L
AGGING
H
I
R
OLLER
, M
INI
R
OLLER
, L
O
R
OLLER
& H
I
L
IFE
112
P115506 R3
8. The belt must be tracked before and after the tripper. Each section must be
tracked individually. The section from the tail to the first top pulley of the first
tripper must be tracked as an individual conveyor. Then, the bottom pulley of
that tripper to the next tripper or head pulley must be tracked individually and
so on through the entire length of the conveyor.
Note:
If pulley adjustments do not improve the belt tracking, only then should idlers be
adjusted - and ONLY if the conveyor is square, level, in-line, belt splice is square,
belt is running on the flat part of the idler; and the load is centered.
9. Test-run the conveyor both empty and loaded. Continue the training process
until the desired training is achieved.
10. If adjusting the bearings on one side of the conveyor does not achieve proper
training, repeat the procedure on the opposite side of the conveyor.
11. If the belt will not train after all of these procedures, thoroughly check that the
trunking, tripper, head and tail sections are square, level, and straight, and
that the belt splice is square, the belt is running on the flat part of the idler,
and that the load is centered. If nothing helps, contact Hi Roller Conveyors.
12. If the belt trains significantly different when loaded vs. empty, contact Hi
Roller.
Note:
The tripper pulley bearing mounts are removable as a complete assembly with
the pulley, shaft, bearings, and mount plates. Bearings can be moved back and
forth with the jock-bolt for belt tracking. This is typical on both tripper pulleys. See
Figure 7.39.
Figure 7.39 Tripper Pulley Bearing Mounts
7.7. HEAD & DRIVE PULLEY LAGGING
7.7.1. R
EMOVING
L
AGGING
:
1. To access lagging:
• Remove discharge overshot.
• Remove any other attachments that obstruct access to the pulley.
• Remove head/drive pulley if the shop bench method is planned.
• Split the belt if necessary (ie: if belt cannot be held away from the pulley
by other methods).
• Loosen the conveyor belt and insert wood spacers (2" x 4") to allow open
space to remove lagging plates.
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