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BAC Parts
Parts Reference Materials

Aluminum Sheave Bushing Installation Instructions

Read complete instructions before proceeding:

  1. Wipe the shaft, bushing bore, bushing taper, and aluminum sheave bore with a cleaning solvent to remove any dirt or oil.
  2. Tighten each bolt a little at a time so that the bushing draws evenly into the sheave hub without cocking to one side or the other. Torque the bolts as specified on the chart below. Rotate the sheave to verify that it does not wobble.
  3. Do not attempt to bottom-out the bushing in the aluminum sheave. After proper bolt torque is applied, there should still be a gap between the bushing flange and the sheave hub.
  4. Follow belt tensioning and sheave realignment instructions.
CautionTip

BAC Caution Tip

Failure to follow these instructions may result in a cracked sheave!
Do not use an anti-seize product or any lubricant on the bolts!

Sheave Size Bushing Type Bushing Type
2B3.6 thru 2B4.4 SH 6
2B4.6 thru 2B6.8 SDS 6
2B7.0, 2B16.0 SK 13
2B20.0 SF 22
4B4.2 thru 4B6.6 SD 6
4B6.8 thru 4B9.4 SK 13
4B16.0, 4B20.0 SF 19
4B25.0, 5B25.0 E 35
6B5.0 thru 6B5.4 SD 6
6B5.6 thru 6B6.8 SK 13
6B7.0, 6B7.4, 6B9.4 SF 22
6B30.0, 6B38.0 E 35
8B5.6 SK 13
8B7.4 thru 8B8.2 SF 22
8B8.8 thru 8B9.4 E 35
8B38.0, 8B50.0 F 55