Fan Motor Lubrication; Fan Shaft Bearings; Centering Fan Wheel; Fan Shaft Position Adjustment - Bryant 524J Series Installation, Start-Up And Service Instructions Manual

Fan Motor Lubrication

Fan motor supplied with unit is permanently lubricated and re-
quires no further lubrication.

Fan Shaft Bearings

Size 25-30 units have pillow-block bearings (Fig. 21) that must
be lubricated with suitable bearing grease approximately every
3 months. See Table 10 for suitable lubricants.
Table 10 — Lubricant Data
MANUFACTURER
Mobil
Sunoco
Texaco
Texaco
NOTE(S):
a. Preferred lubricant, contains rust and oxidation inhibitors.
Locking
Bolt
Shaft
Fig. 21 — Fan Shaft, Bearings, and Fan Wheel (Typical)
LUBRICANT
Mobilplex EP No. 2
Prestige 42
Multifak 2
Regal AFB-2
a
Fan
Wheel
Hub
Bearing
Grease
Fitting
Locking
Collar

Centering Fan Wheel

If fan and fan shaft assembly are not properly centered, blades
may scrape against the blower side scroll plate or may create
an objectionable whistling noise. It may be necessary to adjust
individual fan wheels or move entire fan shaft. See the Fan
Shaft Position Adjustment and Individual Fan Wheel Adjust-
ment sections that follow.

Fan Shaft Position Adjustment

Loosen setscrew or locking collar of each fan shaft bearing.
Slide shaft into correct position and replace locking collar. (See
Fig. 22). To replace locking collar, push collar up against inner
face of bearing. Turn collar in direction of fan rotation until
tight, and tighten setscrew. Tightening locking collar in
direction of fan rotation results in further tightening of collar
should setscrew work itself loose.
Locking Locking
Collar Collar
Fig. 22 — Fan Shaft Bearing
22
Fan Fan
Shaft Shaft
Fan Fan
Shaft Shaft
Bearing Bearing