Conveyor Belting Trouble-Shooting

Below are some conveyor belt problems, and some of their causes and solutions.DIRECT BELTING handles many questions regarding belting problems on a daily basis. If you are having a problem, PLEASE give us a call, we are happy to help.

How to Track or Train a Belt

Before installing belt: ALL pulleys, snubs, idlers and structure must be square for proper belt alignment. All foreign material should be removed from pulleys & idlers. Replace lagging if needed.

INSTALL BELT: Operate under tension for a minimum of two (2) hours before making adjustments. (Unless there is a severe problem.) This will allow temporary mal-distribution of tension in belt to even itself out.

Adjust idlers only: Pulleys and snubs have very little positive effect in training. (Unless the problem is obvious.)

Train by knocking ahead (2 degrees max) the end of the idler to which the belt rides. This should be done over a reasonable length of the conveyor preceding the problem area.

If the above method does not solve your problem -- contact factory for further technical information.

Vulcanized splice delamination or failure

1.Pulley too small -- check recommended minimum for belt.

2.Belt running wrong direction -- check for manufacturer`s arrow/ make sure leading edge of splice contacts pulley first.

3.Reverse bend -- use thinnner belt

4. Too much tension for belt -- use heavier construction

Belt does not track properly

1.Pulleys/and or idlers NOT squared

2.New belt not "run in" long enough

3.Uneven loading -- load off center

4.Structure not square

5.Lacing or splice not squared

6.Bow in belt

Cleat delamination

1.Pulleys too small -- check for minimums for clest type

2.Returnn idlers hitting cleats

3.Material conveyed affecting bond(oils,acids,etc.)

4.Product overload

5.Poor tracking -- cleat edges repeatedly hitting conveyor frame

Flange delamination or cracking

1.Pulley is too small -- check minimum for flange height. Sipe, and sipe and drill, or notch for small pulleys.

V-guide delamination or cracking

1.Pulley too small -- notch for small pully

2.Severe misalignment

3.Wrong size cross section for pulley groove

Fastener pullout

1.Wrong size fastener

2.Fastener not installed properly

3.Obstruction touching splice area

4.Poor tracking -- splice hitting conveyor frame

Severe edge wear

1.Pulleys, idlers or structure not square

2.Worn pulley lagging

3.Offset loading conditions

4.Load off center

Excessive belt stretch

1.Too much tension for belt being used -- go to a stronger belt

2.Insufficent take-up

3.Overtightening of take-up

Excessive belt slip

1.Tighten take-up or pulley

2.Lag or replace worn lagging

3.Pulleys too small -- not enough wrap -- use lighter belt or larger pulley

4.Material spillage -- lag pulleys and/or install cleaning devices

Elvator bolt pull-out

1.Bolt not tight -- tighten monthly

2.Bucket hung up in boot

3.Belt tension too low causing elongation of holes

4.Adverse conditions -- heat, oils, acids

TOP OF PAGE