LJ Wing WDF Operation Manual Download Page 27

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24. Monitor for excessive heat or vibration during

operation.

25. All bearings are pre-lubricated and should

not require greasing. Refer to the bearing
manufacturer’s instructions or the unit
manufacturer’s instructions for proper bearing
maintenance.

Note: Drive side Sleevlock bearing installation
(SPB-2115-C2).
1. Mount all the bearings and leave all the bolts

and setscrews loose

2. Tighten setscrews on Sleevlock bearing to

the tightening pattern as described in the
installation sheet that comes with the bearing
to a fi nal 65 inch lbs while rotating the shaft.
Check to make sure the insert of the bearing is
centered in the bearing housing and then bolt
bearing down.

3. Tighten down the bolts and setscrews on

the remaining bearings per installation sheet
starting from the end bearing back toward’s the
Sleevlock while rotating the shaft.

3. Dampers – Dampers should be inspected monthly

(daily in icy weather)

for securely fastened linkages,

and smooth operation. If dampers are binding or
excessively noisy, then lubrication may be required.
Place one drop of #20 wt. machine oil, silicone spray,
graphite or equal on each blade bearing, and linkage
ball joint. Do not over lubricate, and wipe any excess
from the area. Be sure to note that dampers over 49
inches long have intermediate bearings which require
lubrication.

C. Air Filters

All

lter banks should be equipped with a manometer

or differential pressure switch to indicate when the

lters are dirty. Filters should be replaced when

the differential pressure across them reaches the
manufacturer’s recommended

nal value. Dirty

lter

elements should be replaced with a clean element of
the same type and size. In addition, the factory not
only suggests, but insists, that air

lters be

checked

every 30 days

and replaced with new

lters (throw-

away type) or cleaned (washable type) as required.
Cleanable

lters should be given new application of

lter coating after washing to maintain optimum

lter

performance.

The frequency of cleaning and replacing air

lters

applies twelve months of the year,

where blowers

are used for ventilation and heating.

D. Belt Tensions and Adjustments

Belt tension is adjusted during the initial run-in and test
periods at the factory. However, the belts are run as
slack as possible to prevent excessive damage to the
bearings, yet tight enough to prevent slippage.

It is necessary, therefore, to tighten all belts during the

rst few months of operation, and to

check for proper

tension weekly during

the

fi rst 60 days,

after which

30-day check intervals are suf

cient.

NOTE: Turn off all power to the equipment before
checking belt tensions.

CAUTION: Do not attempt to tighten any belt or belts
by changing the pitch of an adjustable pulley, as this
will change the speed of a driven pulley, causing the
unit to be rendered OUT OF AIR BALANCE. Do not
overtighten belts.

Suggested Belt Tension Method

1. Check tension frequently during the

rst 24-48

hours of run-in operation. Ideal tension is the
lowest tension at which the belt will not slip under
peak load conditions. Over tensioning shortens belt
and bearing life.

2. To properly tension a conventional V-belt drive use

the following procedure:
a. Measure the span length.
b. At the center of the span, apply a force perpen-

dicular to the span to de

ect the belt 1/64 inch

for every inch of span length. For example, for a
40 inch span, apply a force that will de

ect the

belt 40/64 or 5/8 of an inch.

c. Compare the force you have applied with the

values given in the table below. If the force is
between the values for normal tension and 1-1/2
times normal tension, the belt tension should be
satisfactory. If the belt tension is not within this
range, it can be adjusted by loosening the motor
mounting bolts, and adjusting the position of the
motor along its base.

B Section
small

Pounds

pulley

Pounds Force

for

diameter

Belt Force

for

times

range in

Manufacturer

Normal