
Tensioning and aligning the belt drive
Service the pulleys and belts during scheduled Major Maintenance service interval or if belts fail.
For optimum belt performance, the V-belt drive must be
tensioned and aligned properly. Follow these general
rules when tensioning a drive:
•
The ideal tension for the belt drive is the lowest ten-
sion at which the belt will not slip under the highest
load condition.
•
Check tension on a new drive belt frequently during
the first day of operation and periodically thereafter.
•
Excessive tension shortens belt and bearing life.
•
Keep the belt and pulleys free from oil, grease, cut-
ting lubricants, or belt dressing—any of these can
cause the belt to slip.
•
If a V-belt slips, it is not at proper tension and needs
to be tightened.
•
Do not use subsititute hardware.
Servicing the belts
WARNING
Place the main electrical disconnect in the
OFF position and bleed down all high-pressure lines. Place
an “Out of Service” tag on the main electrical disconnect
and lock it out. Failure to do so can result in equipment
damage or injury to personnel.
1. Shut down the system.
2. Remove the belt guard.
3. Loosen the four hex nuts that attach the transmission
housing to the electric motor. Turn the nut on the
tension bar CCW. This allows the weldment to rotate
so you can remove the belts.
4. Install the four new belts.
Note
: It is important to replace all four belts at the
same time to maintain consistent performance of the
drive system.
© Flow International Corporation
M-416 | 91
CHAPTER 4
Service
Содержание HYPLEX
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