🔍 Key Concepts

• Belt alignment and angular misalignment between motor pulley and compressor pulley as shown in Figure 5 of GS-0159 • How side loading from a misaligned belt transfers directly into the motor pulley bearing and produces uneven radial loading • Relationship between the direction of belt pull and which side of the bearing race carries more load and therefore shows more wear

💭 Think About

• Look carefully at Figure 5: in which direction is the belt pulling on the motor pulley relative to the motor shaft centerline? Is the load concentrated more toward one side of the bearing or evenly across it? • Imagine a cross‑section of the motor pulley bearing: if the belt is pulling down and to one side, which part of the inner and outer races would the rolling elements crowd against as the shaft turns? • Compare each wear pattern (a), (b), (c), and (d): which one best represents a bearing that has been continuously side‑loaded in one direction rather than evenly loaded?

✅ Before You Answer

• Verify which figure in GS‑0159 shows pure angular misalignment versus parallel misalignment and focus only on the one specified in the question (Figure 5). • For each possible wear pattern, check whether the wear is symmetrical about the centerline (indicating proper alignment) or heavier on one edge (indicating misalignment/side loading). • Confirm that the pattern you choose matches a bearing that has seen constant off‑center radial force in the same direction over time, consistent with the belt arrangement in Figure 5.