Baltidrive; Fan Shaft Bearings; Adjustable Motor Base - Baltimore Aircoil Company 3000 Series Operating And Maintenance Instructions Manual

Maintenance
Procedures
(continued)

FAN SHAFT BEARINGS:

The fan shaft is supported by two pillow block ball
bearings, each equipped with a lubrication fitting and a
slinger/locking collar to keep out moisture. The bearings
should be lubricated as follows:
Initial Start-Up: Normally no lubrication is required since
the bearings have been lubricated at the factory prior to
shipment. However, if the cooling towers have been stored
at the job site for more than one year, bearings should be
lubricated with new grease before initial operation. When
lubricating, purge the old grease from the bearing by
gradually adding grease until a bead of new grease
appears at the seal on the underside of the bearing.
Seasonal Start-Up: Purge both bearings with new
grease prior to start-up.
Adjustable Motor Base — Series 1500
Figure 4
Operation: Lubricate bearings after every 2,000 hours of
operation or once every three months, whichever comes
first.
Seasonal Shutdown: Purge bearings with new grease
prior to any prolonged storage or downtime.
The fan shaft bearing should be lubricated only with a
hand grease gun. Do not use high pressure grease
guns since they may rupture the bearing seals.
Lubricate the bearings only with one of the following
water resistant greases which are good for ambient
temperatures ranging from –65˚F to +250˚F.
American – Rycon #3
Keystone – 84 EP Light
Exxon – Beacon #325
Mobil – Mobil #28
Shell – Aeroshell #17
Chevron – SRI

ADJUSTABLE MOTOR BASE:

The motor base adjusting screw (See figure 4 & 5) should
be coated twice a year using a good quality corrosion
inhibiting grease such as one of those recommended for
lubricating the fan shaft bearings.
Adjustable Motor Base – Series 3000 and
Figure 5
®

BALTIDRIVE

POWER TRAIN:
The BALTIDRIVE ® Power Train consists of a specially
designed belt, with corrosion-resistant fan motor sheaves.
The solid-backed, multi-groove, neoprene/polyester belt
provides the premium quality necessary for cooling tower
service. The corrosion-resistant sheaves extend the life of
the belt by minimizing any possibility of rust or corrosion.
These components provide a highly reliable system with
low-maintenance requirements. The only servicing
required on the BALTIDRIVE
cally check the condition of the belt and, when neces-
sary, adjust the tension. The recommended service
intervals are specified below:
INITIAL START-UP:
No servicing is required prior to initial tower start-up since
the drive has been tensioned and aligned at the factory.
SEASONAL START-UP:
Readjust the tension on the belt.
OPERATION:
After the initial tower start-up or the installation of a
new belt, the tension must be readjusted after the first
24 hours of operation. Thereafter, the condition of the
belt should be checked quarterly and the tension adjust-
ed as necessary, but at least once every three months.
To check the belt tension, place a straight edge along the
belt from sheave to sheave as shown in Figure 6a or use
a tape measure as shown in Figure 6b to measure belt
deflection. Apply a moderate force by hand (approximately
40 lbs) evenly across the width of the belt in the center of
the span between the sheaves. If the belt deflects between
1/4" and 3/8" as shown in Figure 6a and 6b, the belt is
adequately tensioned.
® Power Train is to periodi-
7