5.7 Install the V-belt drive guard
WARNING:
The driver guard used in an ATEX classified environment must be constructed from a spark re-
sistant material.
1.
Assembly the drive guard as necessary. Use appropriate hardware.
2.
Secure the drive guard in place to the foundation or baseplate and pump as necessary. Use appro-
priate hardware.
Figure 31: V-belt drive guard
5.8 V-Belt drive operation
5.8.1 V belt drive installation checks
Use the following steps and guidelines to make sure that the v-belt drive is properly installed and that the
belts are properly tensioned.
1.
Operate the drive for a few minutes as the belts seat into the sheave grooves.
2.
Observe the operation of the drive under its highest load condition, which is usually at startup.
3.
A slight bowing of the slack side of the drive indicates proper tension.
4.
The following indicate improper belt tensioning:
a) If the slack side of the drive remains too taut during peak load, the drive is too tight.
b) Excessive bowing or slippage of the slack side indicates insufficient tension.
c)
If the belts squeal as the motor is started, or at some subsequent peak load, the belts are not
tight enough to deliver the torque that is demanded by the motor.
5.
If any of the conditions that are listed under (4) are evident, stop the drive and readjust the belts.
6.
If conditions persist, check the sheave alignment as outlined in the previous sections.
7.
The belt tension on a newly installed drive should be checked throughout the first day of continuous
operation by observing the slack side span. After a few days of operation, the belts will fully seat
themselves in the sheave grooves, and further readjustment may be necessary. Use the steps and
guidelines above as necessary.
5.8.2 V-belt drive monitoring and protection
1.
Use all of the information in these sections to ensure that the v-belt drive is properly installed for
correct operation and long life.
2.
Keep the v-belts clean. Exposure to dirt and grease can reduce belt life. Maintaining a clean drive
is the one of the best practices a user can employ to ensure drive longevity.
3.
Always follow safety procedures. Never adjust any components of the v-belt drive while the unit
is in operation.
5.7 Install the V-belt drive guard
XHD Installation, Operation, and Maintenance Manual
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