FM-21: INTERNAL DRIVE GRINDS, KNOCKS, SCRAPES, OR RUNS ROUGH

FM-21 INTERNAL DRIVE GRINDS, KNOCKS, SCRAPES, OR RUNS ROUGH

• With no accessory load, the front drive makes abnormal metallic noise or feels rough.

  With no accessory load, the front drive makes abnormal 1. Remove the pack and every accessory; inspect nose, vents, and housing

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

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