| - Industrial
Applications
-
Automotive Applications |
| |
| BELT
TURN OVER IN PULLEY |
Poor drive alignment. |
: Realign |
| Incorrect pulley groove or excessive
wear in grooves. |
: Modify or replace pulleys. |
| Excessive belt flap. |
: Use an inside idler on slack side |
| Low belt tension. |
: Retension |
| Worn out belt. |
: Replace with new belts. |
| Ingress of foreign material. |
: Use more effective drive guard. |
|
|
EXCESSIVE WEAR |
Incorrect pulley section. |
: Modify or replace pulleys. |
| Excessive wear
in pulley groove. |
: Modify or replace
pulleys. |
| Poor drive alignment. |
: Realign. |
| Small pulley
diameter below recommended. |
: Redesign using
correct pulley diameter/
Use notched
construction V-belts. |
| Worn out belt. |
: Replace with
new belts. |
| Belt catching
or protruding parts. |
: Remove protrusion
or move drive away. |
|
| EXCESSIVE
NOISE |
Poor drive alignment. |
: Realign |
| Incorrect belt tension. |
: Retension. |
| Overloaded drive. |
: Check drive details & redesign. |
| Unbalanced pulleys. |
: Redesign, if necessary balance
the pulleys. |
|
BELT
SWELLING OR SOFTENING
|
Contamination by oil
or other chemicals. |
: Protect drive from
contamination clean pulley
grooves
with petrol or alcohol before fitting
new
belts. if contamination cannot be
prevented
use AOH construction V-Belts. |
|
| UN-USUAL
BELT STRETCH |
Worn out badly damaged
grooves. |
: Modify or replace pulleys. |
| Used belts with new belt on drive |
: Replace with completely new set
of belt |
| Belt from different manufacturers |
: For use in a set, belt must be
from
one manufacturer. |
|
|
BELT BREAKING AFTER FITMENT |
Forcing belt over pulley
when fitting, damaging cord & cover. |
: Reduce drive center
distance to fit belt. |
| Ingress of a
foreign material. |
: Fit an effective
guard. |
| Insufficient belt
or wrong section for drive. |
: Check drive
design & fit correct no.
or
section of belts. |
| Drive stalled. |
: Ascertain cause
& rectify. |
|
|
CUTS AND SPLITS IN THE BASE |
Outside idler pulley
in use. |
: Replace with inside
idler pulley on the
slack side
of drive. |
| Pulley diameter too small. |
: Redesign using recommended minimum
pulley pitch diameters/ Use notched
construction V-belts. |
Ambient temperature too high.
[above 60o C] |
: Ensure good ventilation & protect
the belts from direct heat/ Use AOH
construction V-belts. |
Ambient temperature too low.
[below - 18o C] |
: Warm area surrounding drive. |
| Abnormal belt slip. |
: Check drive design to ensure correct
no of belt, redesign if necessary, check
drive tension. |
| Contamination by oil or chemical. |
: Protect drive from contamination. |
|
|
SEVERE BELT VIBRATIO |
Drive has insufficient
belts. |
: Check drive design
& modify if necessary |
| Centre distance
more than recommended. |
: Shorten centre
distance, use an inside
idler in
the drive slack side. |
| High shock loading. |
: Use Banded
belts/Use an inside idler
pulley
in the slack side. |
| Too low belt
tension. |
: Retension the
belt. |
| |
Unbalanced pulleys. |
: Balance the
pulleys. |
|
| CANNOT
BE RETENSIONED |
Insufficient allowance
for stretch in drive design. |
: Give sufficient allowance
for take up. |
Excessive stretch caused by insufficient
belts
or wrong belt or wrong belt section for drive. |
: Recalculate drive design &
modify. |
| Incorrect belt length. |
: Use a shorter belt. |
| |
Belt from different manufacturers
used
on the same drive. |
: For use in a set, belts must be
from one
manufacturer. |
|
| |
