Joyner JNSZ1100SV Owner's Manual page 46

2.8. Make careful and detailed checks on the timing belt. Replace with new parts if any
of the conditions shown in the figure occurs.
2.8.1. Cracks on the backside rubber;
2.8.2. Cracks of teeth roots, cracks clearing off the fabric lining layer;
2.8.3. Tears and wears of fabric lining layer, missing rear teeth, broken teeth, etc.
2.8.4. Abnormal tears and wears on belt sides
Abnormal Tears and wears
2.8.5. Even if the damages on the outer appearance can not be confirmed, the belt
should be replaced under any of the following circumstances:
2.8.5.1. If the water in the water pump is leaked, which makes it necessary to refill the
water continuously;
2.8.5.2. There are much oil stains on the belt, the belt should be replaced for the rubber
will be damaged when it is expanded;
Specifications and model of the timing belt
Part number
Belt wide
Timing belt tensioner
Turn the belt tensioner supporting stand bolts to see if there is any abnormal sound.
Check to see if there are any damages on the contacting surface of the belt.
Specifications and model of the timing belt tensioner
Part number
Wide
Outside diameter
Check to see if there are any damages on the outer appearance
Specifications and model of clockwise pulley
Chap
Chap
372-1007030
２７．０mm
372-1007030
２７．０mm
φ50mm
MIS
Drop-off of belt core
Tears and wears