Interroll Drum motor series i, S, S/A, D
Troubleshooting
102
Version 4.1 (06/2015) en-US
Translation of original instruction manual
Fault Possible cause Remedy
Belt not correctly adjusted /
belt does not run centered
Material deposits on drum
motor/rollers/belt
Ensure that belt and drum shell are not being blocked and all
rollers and drum shells can turn freely.
Check belt connection.
Material deposits on rollers Check whether material detaches itself and ensure that the
cleaning devices function correctly.
Defective or poorly fixed belt Check belt condition and belt connections.
Belt tension higher on one side Ensure that the belt tension is equal on both sides.
Check whether continuous connection of belt was done in
parallel.
Top/bottom rollers not
correctly adjusted
Check adjustment of support and returning rollers.
Start roller/end roller/interim
roller not correctly adjusted
Check adjustment of drum motor and roller.
Conveyor frame not correctly
adjusted
Ensure that the conveyor frame is rectangular, parallel and
straight over the entire length.
Feeding materials from one
side
Check force or friction at transfer point.
Belt profile not connected with
drum profile
Ensure that belt and drum profile match and are correctly
connected and adjusted.
Drum camber too low for belt Check belt / drum motor specifications.
Oil exiting at shaft seal Shaft seal worn Check whether negative chemical or aggressive materials/
conditions are present.
Check operating service life of seals.
Shaft seal damaged Ensure that there are no steel residues, material deposits or
other particles at the seals.
Cap bearing damaged / worn Check whether the belt is tensioned or loaded too much.
Check whether water or chemicals have entered.
Excess grease in labyrinth seal Check whether oil or grease is exiting. Oil remains fluid and
grease hardens when it cools down.
Remove excess grease. If the problem persists, contact local
Interroll dealer.
Small amount of grease exiting in the S-series is normal and
not a problem.
Oil exiting at the cable/
terminal box
Loose cable connection socket
Defect at internal cable seal
Ensure that cable connection socket and seals are tight and not
stressed by overheating or chemicals.
Loose cable connection socket
Seal at terminal box defective
Ensure that cable connection socket and seals at terminal box
are tight and not stressed by overheating or chemicals.
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