Walinga Central-Vac Operator And Parts Manual page 49

PROBLEM
Motor overloading.
Loss in drive speed.
CAUSE
Impellers rubbing.
Belts slipping.
Localized belt wear.
Unequal stretch on belts.
Belts overloaded.
Belt separation.
Envelope seams opening.
Abnormal envelope wear.
Belt softening or swelling.
Belt hardening or cracking.
SOLUTION
Consult your nearest dealer.
Tighten belts as required.
Check cross-section dimension.
a. If narrow, pulley spinning.
b. If swollen, belt failing internally.
Defective belts. Replace with
matched set.
Belts failed or worn out. Replace
belts with matched set.
Belts too tight. Replace belts and
set correctly.
Check for oil or rubber solvent.
Eliminate contamination and
replace belts.
Check for worn sheave, misalign-
ment or slip. Replace defective
parts, adjust properly and replace
belt.
Eliminate oil or rubber solvent.
Replace belt.
Eliminate heat or chemical con-
tamination. Replace belt.
49