KAH Operation & Maintenance Guide
Page: 43 of 88
Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | [email protected] | www.krueger-hvac.com
SECTION 3 - MAINTENANCE (CONTINUED)
FIGURE 46 - BEARING WITH SET SCREW TYPE
LOCKING DEVICE
FIGURE 47 - BEARING WITH ECCENTRIC CAM
FIGURE 49 - OPTIONAL LUBRICATION LINES
FIGURE 48 - SPLIT BEARING (ASSEMBLED)
1. Seal (4)
2. Housing Cap
3. Cap Bolts (2)
4. Locating Ring (2)
5. Lock Nut
6. Lock Washer
7. Tapered Sleeve
8. Bearing
9. Housing Base
Fan Bearing Lubrication
If the fans will be down for four weeks or more, properly
apply correct grease and rotate monthly to prevent
moisture from damaging bearings.
Fan bearings on the AHUs are equipped with standard
lubrication fittings. AHUs under 42” tall will have either
extended lube lines, enabling lubrication of both fan
bearings from one side of fan as shown in Figure 49
(right) or optional external lube lines. For AHUs 42” tall
and above, extended lube lines and external lube lines
are optional. Some fans will have permanently lubricated
bearings.
For specific fan bearing lubrication, check the instruction
packet attached to the fan housing. Some forward curved
fans are permanently lubricated.
For best results, relubricate the standard pillow block
bearings while in operation if it safe to do so. Add grease
slowly with the shaft rotating until a slight bead forms at
the seals.
If necessary to relubricate while the bearing is stationary,
refer to the manufacturer’s data for maximum grease
capacity for the size bearing.
Relubrication is generally accompanied by a temporary rise
in operating temperature. Excess grease will be purged at
the seals. Wipe away purged grease after several hours
of operation.
