V-belt drive assembly can be mounted as follows:
1. Clean motor and fan shafts. Be sure they are free
from corrosive material. Clean bore of sheaves and
coat with heavy oil for ease of shaft entry. Remove oil,
grease, rust or burrs from sheave grooves.
2. Place fan sheave on fan shaft and motor sheave on
its shaft. Do not pound sheaves on as this may
damage bearings. Tighten sheaves per Table #1 or #2
on page 2.
3. Move motor on slide base so belts can be placed in
grooves of both sheaves without forcing. Do not roll
belts or use a tool to force belts over the grooves.
4. Align fan and motor shafts so they are parallel. The
belts should be at right angles to the shafts. A straight
edge or taut cord placed across the face of the
sheaves will aid in alignment.
5. Tighten belts by adjusting motor base. Correct tension
gives the best drive efficiency. Excessive tension
causes undue bearing pressure.
6. Start the fan and run it at full speed. Adjust belt
tension until only a slight bow appears on the slack
side of the belts. If slippage occurs, a squeal will be
heard at start-up. Eliminate this squeal by
disconnecting or locking out motor from power
source and then tightening up the belts.
7. Give belts a few days running time to become seated
in sheave grooves, then readjust belt tension.
If the shafts become scratched or marked, carefully
remove sharp edges and high spots such as burrs with
fine emery cloth or honing stone. Avoid getting emery
dust in the bearings.
Do not apply any belt dressing unless it is recommend-
ed by the drive manufacturer. V-belts are designed for
frictional contact between the grooves and sides of the
belts. Dressing will reduce this friction.
Belt tension on an adjustable pitch drive is obtained by
moving the motor, not by changing the pitch diameter of
the adjustable sheave.
Sealed Bearings
Sealed for life bearings are pre-lubricated with the
correct amount of manufacturer approved ball bearing
grease, and are designed for application where
relubrication is not required.
Relubricatable Bearings
The motor bearings and fan bearings on belt drive fans
should be greased at regular intervals. Motor manufac-
turers greasing instructions and recommendations
should be followed closely. Avoid the use of a pressure
greasing system which tends to fill the bearing chamber
completely. Do not over grease.
NOTE: On motors with non-regreasable, sealed
bearings, no lubrication is required for the life of the
bearing.
Table #3 (page 4) lists the time intervals between fan
greasing to insure proper lubrication in adverse
conditions of heat and dust. Use only 1 or 2 shots with a
hand gun in most cases. Maximum handgun rating 40
P.S.I.
Cincinnati Fan & Ventilator Company warrants products
of its own manufacture against defects of material and
workmanship under normal use and service for a period
of eighteen (18) months from date of shipment or twelve
(12) months from date of installation, whichever occurs
first.
This warranty does not cover ordinary wear and tear,
abuse, misuse, overloading, negligence, alteration or
systems and/or materials not of Seller’s manufacture.
Expenses incurred by Buyer(s) in repairing or replacing
any defective product will not be allowed except where
authorized in writing and signed by an officer of the
Seller.
The obligation of Seller under this warranty shall be
limited to repairing or replacing F.O.B. Seller’s plant, or
allowing credit at Seller’s option. This warranty is
expressly in lieu of all other warranties expressed or
implied including the warranties of merchantability and
fitness for use and of all other obligations and liabilities
of the Seller. The Buyer acknowledges that no other
representations were made to him or relied upon him
with respect to the quality or function of the products
herein sold.
On equipment furnished by the Seller, but manufactured
by others, such as motors, Seller extends the same
warranty as Seller receives from the manufacturer
thereof. Repairs for motors should be obtained from
nearest authorized motor service station for the make of
motor furnished. All motors used are products of well-
known manufacturers with nationwide service facilities.
Check the yellow pages of your telephone directory for
the location of the nearest service shop.
Cincinnati Fan & Ventilator Company assumes no
responsibility for material returned to our plant without
our prior written permission.
5
VIII. BEARING MAINTENANCE
IX. WARRANTY
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