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851-592 Rev. A
21
Dorner Mfg. Corp.
7400 Series End Drive Conveyors
Preventive Maintenance and Adjustment
Conveyor Belt Tensioning
1. Remove both pull pins
(Figure 59, item 1)
on the
tension end of the conveyor.
Figure 59
2. Extend the idler tail to the next groove
(Figure 59, item 2)
on the bearing shaft.
3. Continue extending the tension end until the belt is
sufficiently tight
(Figure 60)
.
Figure 60
4. Reinsert the pull pins.
5. If no more travel is available, remove one or more belt
links to take up the tension. Refer to “Replacing a
Section of Belt” on page 18.
Sprocket and Puck Removal
1. Remove the conveyor belt to access the sprockets /
pucks. Refer to “Conveyor Belt Replacement” on
page 18.
2. Remove the desired sprocket / puck by following these
instructions:
• A - Drive Sprocket Removal
• B - Idler Puck Removal
A - Drive Sprocket Removal
A
WARNING
SEVERE HAZARD!
LOCK OUT POWER before removing guards
or performing maintenance. Exposed moving
parts can cause serious injury.
CAUTION
Belt sag should not exceed 4" (102 mm) from
the top of the returns.
1
2
A
WARNING
SEVERE HAZARD!
LOCK OUT POWER before removing guards
or performing maintenance. Exposed moving
parts can cause serious injury.
A
WARNING
PUNCTURE HAZARD!
Handle drive shaft keyway with care. It may
be sharp and could puncture the skin,
causing serious injury.