1
2
3
Figure 6: V-belt tension
Many v-belt drive manufacturers offer tension measurement tools that can aid in setting proper belt
tension. Contact the v-belt drive manufacturer for more information.
3.
Secure the overhead motor mount on slide base in place once the belts are properly tensioned.
4.
Install the unit after installation to ensure that the belts and sheaves do not come into contact with
the guard.
CAUTION:
The unit must not be operated without the proper drive guard in place. Operating the unit with-
out the drive guard in place could result in personal injury to operating personnel.
3.5 Pump-driver alignment
WARNING:
Alignment procedures must be followed to prevent unintended contact of rotating parts. Follow
coupling manufacturer’s installation and operation procedures.
3.5.1 Shaft alignment of horizontal pump and driver
Pumps and drivers that are received from the factory with both machines mounted on a common sub-
base were accurately aligned before shipment. Because all subbases are, to some extent, flexible, facto-
ry alignment may be altered during shipment and handling. After the subbase has been leveled, grouted,
and secured, check the alignment. Alignment should be rechecked after the pump is fully installed and
before startup. Refer to the Alignment Procedure.
Disconnect coupling halves before proceeding with alignment. Check for angular and parallel alignment
in the Alignment Procedure. The faces and outside diameters of the coupling halves must be square and
concentric with the bores. If this condition does not exist, the Alternate Method of Alignment is recom-
mended.
Subbase mounted horizontal pumps may be shipped with or without drivers and gears. Be sure pump
and drivers are uncoupled before installation. Level by shimming beside each anchor bolt and grout as
described in Installing Pump on Foundation.
3.5.2 Alignment procedure
A check for angular alignment is made by inserting the taper gauge or feelers at four points between the
coupling faces and comparing the distance between the faces at four points spaced around the coupling.
The unit will be in angular alignment when the measurements show that the coupling faces are the same
distance apart at all points
Checking angular alignment.
3.5 Pump-driver alignment
16
Model JC Installation, Operation and Maintenance Instructions
