Milnor 30022F Series, Сервисная инструкция, Страница: 26 / 100

Ê Testing Belt Tension
NOTE: Do not refer to instruction sheet provided with tension testing tool. Use the “Initial tension”
column when adjusting belts that have never been used. Use the “Final tension” column when adjusting belts
that have been used.
Check belt tension (see FIGURE 8) when replacing and
adjusting drive train components. A belt tension testing tool
(Milnor
®
part number 30T001), straight edge, and Belt Ten-
sion Specification table is required when setting belt tension.
Check tension for new belts according to the following
schedule.
•
After 24 hours operation (three eight-hour shifts)
•
After 80 hours operation (ten eight-hour shifts)
•
After 160 hours operation (twenty eight-hour shifts)
Set belt tension as follows:
1. Move upper O-ring on tension testing tool to uppermost position (resting against bottom edge of sliding cap).
2. Determine belt deflection for the tested belt (see FIGURE 1, Item 1 for the belt location, and Table below for
the setting). Move lower O-ring to the correct setting (inches or centimeters) on scale. Read the bottom edge
of the O-ring.
3. Place a straight edge along the top edge (pulley to pulley) of the belt to be tested. Depress the tension testing
tool by sliding the cap against the middle of the belt span until the bottom edge of the lower O-ring aligns
with the straight edge as shown in FIGURE 8.
4. Read the top of the upper O-ring position and determine if it is within specified range.
•
See specifications in the “Initial tension” column for belts that have never been used.
•
See specifications in the “Final tension” column for belts that have been used.
5. If reading is below specified range, belt must be tightened. If reading is above specified range, belt must be
loosened. Adjust belt and repeat Steps 1 through 4 until tension is within specified range.
Ï Belt Tension Specification
Belt
Belt deflection
inches
(millimeters)
Hertz
Initial tension
pounds
(kilograms)
Final tension
pounds
(kilograms)
Drive 24/64 (9.5) All 6.7 - 9.8
(3.0 - 4.4)
5.2 - 7.6
(2.4 - 3.4)
Ë About Belts
—All V-belts are not alike. So called “Super” or “High Capacity” belts frequently have consider-
ably higher capacities than “Standard” belts. Sometimes a particular manufacturer’s V-belt will be more suitable for
a certain application, and another manufacturer’s V-belt may be suitable for a different application. This may occur
in spite of the fact that both manufacturer’s V-belts are reputedly “interchangeable”. Because of this, it is always
best to purchase replacement belts from the original manufacturer of the equipment. If you do not wish to do this,
we suggest that when you replace the belts, you purchase the exact style and type belts with which the machine was
originally equipped. This is the best way to achieve belt life on your replacement belts equal to the life of the original
set. (If you are not satisfied with the life of the original set, you should ask our factory if a better belt has been
developed for the specific application).
Ê Bleach Note
Dry bleaches may cause the inside of the supply injector to show evidence of mild rusting. If this condition
occurs, be certain to carefully clean away the rusting at least once a week. Always inject dry bleach from the cup or
scoop. Never allow the dry bleach to come in direct contact with the stainless steel components of the supply
injector.
Î FIGURE 8
(MSSMA424AE)
Î Testing Belt Tension